Thesis (MSc)--Stellenbosch University, 2004. / ENGLISH ABSTRACT: Multi-criteria decision-making (MCDM) is a set of techniques designed specifically for the analysis of complex problems. Geographical Information Systems (GIS) focus on spatial problem-solving and spatial analysis. The integration of these methodologies offers a powerful approach to decision making. Despite the fact that most spatial decision problems are multi-criteria problems by nature, the process of MCDM is not well established or effectively integrated into the field of spatial analysis and GIS. This research focuses on bridging the gap between MCDM and GIS. To this end, a generic MCDM extension was designed and implemented in ArcView. As a result, a first version MCDM extension is offered. The extension expands ArcView's functionality with a limited set of MCDM methods. This functionality is illustrated on two problems involved with developing the tourism potential at Coutada 16 Wildlife Reserve in Mozambique. The MCDM extension facilitates procedures that allow the evaluation of spatial problems and includes the ability to deal with both raster and vector data. This system offers a generic problemsolving environment, which can be used to evaluate geographical problems of any nature. This research identifies a number of improvements to the developed functionality and successfully illustrates the potential problem-solving capabilities associated with MCDM integrated with ArcView. / AFRIKAANSE OPSOMMING: Multi Kriteria Besluitneming (MKBN) is n versameling metodes vir die analise van komplekse probleme. Geografiese Inligtingstelsels (GIS) fokus op geografiese probleemoplossing en analise. Die integrasie van hierdie twee metodologieë bied 'n kragtige benadering tot besluitneming. Ten spyte daarvan dat die meeste geografiese probleme in wese meerveranderlik van aard is, is MKBN nie effektiefbinne die raamwerk van GIS geïntegreer nie. Hierdie studie fokus op die oorbrugging van die gaping tussen MKBN en GIS. Met hierdie doel voor oë is 'n generiese MKBN-uitbreiding vir ArcView ontwerp en geïmplementeer. Die resultaat is 'n eerste- weergawe MKBN-uitbreiding. Die uitbreiding brei ArcView se funksionaliteit uit om 'n beperkte versameling MKBN-metodes in te sluit. Die nuut ontwikkelde funksies word geïllustreer aan die hand van twee probleme wat die ontwikkeling van die toerismepotensiaal vir die Coutada 16 Wildreservaat in Mosambiek aanspreek. Die uitbreiding maak voorsiening vir 'n MKBN-evaluasie van geografiese probleme en besit die vermoë om beide vektor- en roosterdata te analiseer. Hierdie stelsel verskaf 'n generiese omgewing vir probleemoplossing wat gebruik kan word om byna enige geografiese probleem te analiseer. Die studie identifiseer verbeteringe op en uitbreidings van die ontwikkelde funksies en slaag daarin om die potensiaal van probleemoplossing wat deur die integrasie van MKBN-tegnieke met ArcView moontlik gemaak word, te illustreer.

Thesis (MSc)--Stellenbosch University, 2004. / ENGLISH ABSTRACT: Grazing management in the semi-arid communal areas of Namaqualand is investigated in this study. Paulshoek, situated in the Leliefontein Communal Reserve area, is delineated as the study area and consists of 20 OOOha.Cattle farming is practised by most households primarily on a subsistence basis. It is also used as a source of income when financial problems arise. The management of grazing-land in terms of formal rules and regulations is non-existent with only mutual relationships between farmers. The aim of this study is to develop a spatial framework for the management of a sustainable grazing regime with the aid of Geographic Information Systems (GIS) technology. This aim is reached through three overlapping goals which are researched individually. The goals are to create a spatial image of the physical resource base as well as resource usage and from this the development of a computerised (Excel spreadsheet) spatial management framework for sustainable grazing management. Through the use of existing data available from the National Botanical Institute (NB!) as well as other sources and with the aid of GIS technology, coupled with Indigenous Knowledge, these goals were reached. The stockpost as individual entity is studied to give a broader understanding of how the herdsmen see their immediate environment. The grazing management system, as presented in this thesis, consists of a simple Excel Spreadsheet, with inputs from GIS technology and Indigenous Knowledge. The area is overgrazed, as is seen in the widespread occurrence of kraalbos cross the Paulshoek landscape. The recommendations are that this management system should be implemented, which could minimize the futher overgrazing of the area. The management system relies heavily on the cooperation of the community and the integration of existing management systems and policies. It will give a more detailed account of who may own how many stock and where they may graze in the communal rangelands which will also help in the establishment of new permanent waterpoints in the area. / AFRIKAANSE OPSOMMING: Weidingsbestuur in die semi-ariede gemeenskaplike gebiede van Namakwaland is in hierdie studie ondersoek. Paulshoek, geleë in die Leliefontein Gemeenskapsreservaat gebied, word as studiegebied afgebaken en beslaan ongeveer 20 OOOha.Veeboerdery word deur meeste van die huishoudings primêr as bestaansboerdery beoefen. Dit word ook gebruik as 'n bron van inkomste wanneer finansiële probleme ondervind word. Die bestuur van weivelde in terme van formele reëls en regulasies is glad nie ter sprake nie, slegs onderlinge verhoudinge tussen veeboere bestaan. Die doel van hierdie studie is om 'n ruimtelike raamwerk te ontwikkel vir die bestuur van 'n volhoubare weidingsregime deur die aanwending van Geografiese Inligting Stelsels (GIS). Hierdie doel word behaal deur drie oorkoepelende doelwitte wat elk afsondelik behandel word. Die doelwitte is om 'n ruimtelike beeld van die fisiese hulpbronbasis asook die benuttingsregime van die hulpbron te skep, en hieruit 'n rekenaar-gesteunde (Excel sigblad) ruimtelike bestuursraamwerk vir volhoubare weidingsbestuur te ontwerp. Deur gebruik te maak van bestaande inligting afkomstig vanaf Nasional Botaniese Instituut (NBI) asook ander bronne en met die koppeling van GIStegnologie en Inheemse Kennis (IK) is die doelwitte bereik. Die veepos word as entiteit behandel om 'n beter verstandhouding op te bou van hoe die veewagter sy onmiddelike omgewing bestuur. Die weidingsbestuurstelsel, soos voorgestel in hierdie tesis, bestaan uit 'n eenvoudige Excel sigblad, gekoppel aan GIS-tegnologie en Inheemse Kennis. Die gebied is oorbeweid, soos gesien kan word aan die verspreiding van kraalbos regoor die landskap van Paulshoek. Die aanbevelings is dat die bestuurstelsel geïmplementeer moet word om te verhoed dat die gebied verder onderhewig sal wees aan intensiewe beweiding. Die bestuurstelsel berus op die samewerking van die gemeenskap en die integrasie van bestaande bestuurstelsels. Dit sal tot gevolg hê 'n meer volledige opname van wie hoeveel vee mag besit en wie waar mag vestig in die weiveld gebied, wat gevolglik ook die skepping van nuwe permanente waterbronne sal vergemaklik.

Thesis (MA)--Stellenbosch University, 2000. / ENGLISH ABSTRACT: European cities offer a variety of attractions, activities and facilities to tourists. One component of tourism in this urban context is cultural tourism which is a high potential growth sector within the tourism industry. Cultural tourists travel to cities mainly to see the most important and well known cultural attractions, to take part in cultural festivities, to view the cultural treasures of the cities and to attend performances and exhibitions. Other functions and activities such as retail functions and types also occur in the vicinity of the important cultural attractions of a city. Amongst these activities and functions are shops, cafés and restaurants. In an area of a city where cultural attractions and retail types coexist, the possibility exits that a spatial relationship between cultural tourism and retailing may occur in the sense that the tourists who visit these attractions may support the retail establishments in the vicinity of cultural attractions. The city of Leuven in Belgium is a typical West European city with a variety of cultural tourist attractions as well as functions which can be supportive of cultural tourism. These functions include shops, cafés and restaurants. An investigation was conducted to establish whether a spatial relationship exists between cultural tourism and retail activities in the part of Leuven known as the Ring. The geographical information systems TransCad, Arc/Info en ArcView were used for the processing and analysis of retail and cultural tourism data gathered in the Ring of Leuven. Three analytical procedures were performed separately for shops, cafés and restaurants. These procedures comprised (a) the determination of the numbers and types of supportive functions around the most important cultural-historical tourist attractions, (b) the determination of the numbers and types of supportive functions along the routes to cultural-historical sites from tourist points of origin, and (c) the determination of the numbers and types of supportive functions along guided-walk routes in the city. The analysis results show that a (spatial) relationship does exist between retail and cultural tourism in the Ring of Leuven. On average 44% of the retail functions (shops, cafés and restaurants) are located within a distance of up to saam from the six most important cultural building attractions in Leuven (procedure 1). Retail functions on guided-walk routes totalled 48% with cafés and restaurants being the most abundant (procedure 3). Only 19% of retail functions are located between points of origin and cultural building attractions (procedure 2). A more detailed study should be conducted to establish the exact nature of the spatial relationship which exists between retail and cultural tourism in the Ring of Leuven. / AFRIKAANSE OPSOMMING: Europese stede bied 'n reeks attraksies, aktiwiteite en fasiliteite vir toeriste. Een komponent van die breër term toerisme in hierdie stedelike konteks is kulturele toerisme wat 'n baie sterk groeisektor binne die toerismemark is. Kulturele toeriste besoek stede hoofsaaklik met die doelom die belangrikste en bekendste kulturele attraksies te besigtig, om aan kulturele feeste deel te neem, die kunsskatte van stede te betrag en om teateropvoerings en tentoonstellings by te woon. In die nabyheid van die belangrikste kulturele attraksies van 'n stad kom ook ander funksies en aktiwiteite soos kleinhandelsfunksies en -tipes voor. Hieronder ressorteer onder andere winkels, cafés en restaurante. In die gedeelte van 'n stad waar kulturele attraksies en kleinhandelstipes naby mekaar voorkom, kan die moontlikheid bestaan van 'n ruimtelike verwantskap tussen kulturele toerisme en kleinhandel, in dié sin dat toeriste wat die attraksies besoek, moontlik ook die kleinhandelstipes wat in die nabyheid van die kulturele attraksies voorkom, salondersteun. Die stad Leuven in België is 'n tipiese voorbeeld van 'n Wes-Europese stad met 'n verskeidenheid kulturele toeriste-attraksies asook funksies wat kulturele toerisme ondersteun. Hierdie ondersteunende funksies sluit winkels, cafés en restaurante in. In die deel van Leuven wat as die Ring bekend staan, is ondersoek ingestel na die voorkoms, al dan nie, van 'n ruimtelike verwantskap tussen kulturele toerisme en kleinhandel. Die geografiese inligtingstelsels TransCad, Arc/Info en ArcView is ingespan vir die verwerking en analise van data oor kleinhandel en kulturele toerisme in die Ring van Leuven. Drie ontledingsprosedures is afsonderlk uitgevoer vir winkels, cafés en restaurante. Hierdie prosedures behels (a) die bepaling van die aantal en tipes ondersteunende funksies rondom die belangrikste kultuurhistoriese toeristeattraksies; (b) die bepaling van die aantal en tipe ondersteunende funksies langs die roetes tussen die toeriste-oorsprongpunte en die belangrikste kultuurhistoriese toeriste-attraksies; en (c) die bepaling van die aantal en tipe ondersteunende funksies langs begeleide stadswandelroetes. Die analiseresultate wys dat 'n verwantskap tussen kleinhandel en kulturele toerisme, ruimtelik-gesproke, wel in die Ring van Leuven bestaan. Só is gemiddeld 44% van die kleinhandelsfunksies (winkels, cafés en restaurante) tot op In afstand van SOOmvanaf die ses belangrikste kulturele gebou-attraksies in Leuven geleë (prosedure 1). Ook kom 48% van die kleinhandelsfunksies langs die roetes van begeleide stadswandelinge voor. Hier is dit egter die cafés en restaurante wat die grootste proporsies uitmaak (prosedure 3). 'n Gemiddelde proporsie van slegs 19% van die kleinhandelsfunksies kom tussen oorsprongpunte en die belangrikste kulturele gebou-attraksies voor. 'n Meer omvattende studie moet onderneem word om vas te stel watter tipe ruimtelike verwantskap tussen kleinhandel en kulturele toerisme binne Leuven se Ring voorkom.

Thesis (MA.)--Stellenbosch University, 2001. / ENGLISH ABSTRACT: There are many reasons to conserve fynbos. Not only does fynbos form part of the Cape floral kingdom, one of the richest floral kingdoms in the world, but the contribution that it makes to the regional economy through utilisation, education, recreation and tourist opportunities is immeasurable. Fire plays an integral role in fynbos ecosystems. According to Van Wilgen, Richardson & Seydack (1994: 322) " ... managing fynbos equates to managing fire". Therefore managers need accurate fire information about a fynbos area to manage it properly. This is where satellite remote sensing can provide the manager with useful information about the fire regime. In other words, satellite remote sensing can help a manager establish where and when an area has burnt. Using readily available satellite data, this study attempts to establish (through comparison) what techniques would be most suitable and affordable to compile a fire information database. Landsat Thematic Mapper data from 1990 - 1996 of the southwestern Cape was used and compared with existing fire records of the area. The results show that techniques such as supervised and unsupervised classification are reliable in identifying burnt areas, but a major drawback of these techniques is that they require a large amount of user input and knowledge. They are thus not regarded as simple or easily repeatable. - The' more simple techniques like image differencing and image ratioing were also found to be reliable in identifying burnt areas. These techniques require less user input and in some instances less data (image bands) to produce similar (or better) results than supervised and unsupervised classification techniques. The results show that differencing temporally different Images, obtained from applying principle components analysis, produces reliable results with very little confusion and little user input. Using such a technique could enable users to procure only two bands of Landsat data and still produce reliable fire information for managing a fynbos ecosystem. / AFRIKAANSE OPSOMMING: Daar is verskeie redes waarom fynbos bewaar moet word. Nie net vorm dit deel van een van die rykste blommeryke in die wereld nie, maar die bydrae wat dit tot die streeksekonomie maak, deur die benutting van veldblomme en die geleenthede wat dit bied vir toerisme en ontspanning, is enorm. Vuur speel 'n belangrike rol in die bestuur van fynbos ekosisteme. Soos beklemtoon deur Van Wilgen, Richardson & Seydack (1994: 322) se stelling: " ... managing fynbos equates to managing fire". Om hierdie rede is dit belangrik dat 'n bestuurder akkurate inligting oor die verspreiding van veldbrande moet he. Satellietafstandwaarneming kan hier 'n belangrike rol speel deur sulke inligting te verskaf Deur gebruik te maak van maklik bekombare satellietdata, poog hierdie studie om te bepaal (d.m.v. vergelyking) watter tegnieke die mees geskikte is in terme van bekostigbaarheid en gebruikersvriendelikheid. Landsat Thematic Mapper data van 1990 tot 1996 van die suidwes-Kaap is gebruik en vergelyk met bestaande branddata van die studiegebied. Daar is gevind dat tegnieke soos gerigte en nie-gerigte klassifikasie in staat is om gebrande dele betroubaar uit te ken. Hierdie tegnieke verg egter baie insette en kennis van die gebruiker en is ook nie maklik om jaar na jaar te herhaal nie. Daarom word hierdie tegnieke nie aanbeveel nie. Daar is gevind dat die eenvoudiger tegnieke soos veranderingsanalise ook gebrande dele betroubaar kon uitken. Hierdie tegnieke het die voordeel dat die gebruiker nie baie' kennis van die gebied hoef te he nie en ook nie so baie insette hoef te lewer nie. Hierdie tegnieke word bo gerigte en nie-gerigte klassifikasie aanbeveel. - Die resultate dui daarop dat betroubare resultate verkry kan word deur tempo reel verskillende beeIde, verkry deur hoofkomponentanalise, van mekaar af te trek. Hierdie tegniek vereis relatief min gebruikersinsette en daar kan selfs met slegs twee Landsat bande gewerk word. So 'n tegniek kan beslis 'n bekostigbare en effektiewe manier wees om nodige inligting vir die bestuur van 'n fynbos ekosisteem te bekom.

Thesis (MA)--University of Stellenbosch, 2002. / ENGLISH ABSTRACT: A major concern for Energex, Australia's largest energy utility in South East Queensland, is the escape of natural gas out of their reticulation systems. Within many of the older areas in Brisbane, these networks operate primarily at low and medium pressure with a significant percentage of mains being cast iron or steel. Over many years pipes in these networks have been replaced, yet reports show that unaccounted for gas from the same networks remain high. Furthermore, operation and maintenance budgets for these networks are high with many of these pipes close to the end of their economic life. When operation and maintenance costs exceed the costs of replacement, the Energex gas utility initiates projects to renew reticulation networks with polyethylene pipes. Making decisions about pipe renewal requires an evaluation of historical records from a number of sources, namely: • gas consumption figures, • history of leaks, • maintenance and other related cost, and • the loss of revenue contributed by unaccounted for gas. Financial justification of capital expenditure has always been a requirement for renewal projects at the Energex gas utility, however the impact of a deregulation in the energy utility market has necessitated a review of their financial assessment for capital projects. The Energex gas utility has developed an application that evaluates the financial viability of renewal projects. This research will demonstrate the role of GIS integration with the Energex financial application. The results of this study showed that a GIS integrated renewal planning approach incorporates significant benefits including: • Efficient selection of a sub-network based on pipe connectivity, • Discovery of hidden relationships between spatially enabled alphanumeric data and environmental information that improves decision making, and • Enhanced testing of proposed renewal design options by scrutinizing the attributes of spatial data. / AFRIKAANSE OPSOMMING: 'n Groot bron van kommer vir Energex, Australië se grootste energieverskaffer in Suidoos- Queensland, is die verlies van natuurlike gas uit hul gasdistribusie netwerke. In 'n groot deel van ouer Brisbane opereer hierdie netwerke hoofsaaklik teen lae en medium druk, met 'n aansienlike persentasie van hoofpyplyne wat uit gietyster of staal bestaan. Al is sommige pyplyne in hierdie netwerke met verloop van tyd vervang, maak verslae dit duidelik dat 'n groot deel van die gas in hierdie netwerke steeds langs die pad verlore gaan. Die operasionele - en onderhoudsbegrotings vir hierdie netwerke is boonop hoog, met 'n groot persentasie van die pyplyne wat binnekort aan die einde van hulle ekonomiese leeftyd kom. Wanneer operasionele- en onderhoudsonkostes die koste van vervanging oorskry, beplan Energex se gasvoorsienings-afdeling projekte om verspreidingsnetwerke te hernu met poli-etileen pype. Om sinvolle besluite te neem tydens pyplynhernuwings, word verskeie historiese verslae geraadpleeg, insluitend: gasverbruikvlakke, lekplek geskiedenis rekords, onderhoud- en ander verwante onkostes, asook die verlies van inkomste weens verlore gas. Alhoewel finansiële stawing van kapitale uitgawes nog altyd 'n voorvereiste was tydens hernuwingsprojekte by Energex, het die impak van privatisering op die energieverskaffingsmark dit noodsaaklik gemaak om hulle finansiële goedkeuringsproses vir kapitaalprojekte te hersien. Energex het dus 'n sagteware toepassing ontwikkel wat die finansiële gangbaarheid van hernuwingsprojekte evalueer. Hierdie navorsing sal die moontlike integrasie van geografiese inligtingstelsels (GIS) met dié van Energex se finansiële evalueringspakket demonstreer. Die resultate van hierdie studie toon dat die integrasie van GIS in die hernuwingsproses aansienlike voordele inhou, insluitende: • die effektiewe seleksie van sub-netwerke, gebaseer op pyp konnektiwiteit, • die ontdekking van verskuilde verwantskappe tussen geografies-ruimtelike alfanumeriese data en omgewingsinligting, wat besluitneming vergemaklik, en • verbeterde toetsing van voorgestelde hernuwingsopsies deur die indiepte-nagaan van geografiesruimtelike elemente.

Thesis (MA)--Stellenbosch University, 2003. / ENGLISH ABSTRACT: Rural tourism and agritourism are in their infant stages in South Africa. It benefits the farmer, the local community, the rural area, the tourist and the country. It is therefore a viable option but requires more research, management, planning and control for it to be successful. Many agritourism ventures are not as successful as they should be. The problem is that farmers/landowners do not research the demand for tourist products before they deliver them and do not know whom they are catering for. To stay competitive, the tourists' characteristics ought to be understood. This would provide insight into what facilities and services to supply, what resources to utilise and how to promote the agritourism destination. The aim of this study was to segment the potential and practising agritourists into different clusters, according to their preferences, and to investigate the clusters' characteristics and behaviours. The objectives were to: 1. Investigate the potential and practising agritourists' socio-economic, demographic and travel characteristics. 2. Rate all the attractions, activities and services according to their popularity. 3. Clarify the preferences of these tourists, concerning attractions and activities, by combining similar ones. 4. Divide the tourists into clusters of similar preferences. 5. Compare the socio-economic, demographic and travel characteristics of the different clusters of tourists. 6. Produce a set of guidelines for entrepreneurs/farmers/landowners, as to what tourist products they should supply or develop, and for whom, and how they should market them. This study entailed distributing questionnaires to potential and practising agritourists at shopping centres and farms involved in agritouri'swimming', 'picnicking', 'scenic drives', 'dams/lakes/pans' and 'small game' were the most popular agritourism attractions and activities. Factor analysis was used to reduce the number of variables by combining like variables (attractions) and cluster analysis was utilised to segment the respondents into five clusters of tourists with similar preferences for agritourism attractions and activities. Cross tabulation, frequencies and descriptive statistics were used to describe these different clusters. These groups of tourists were described according to their demographic, socio-economic and travel characteristics. Segmenting tourism markets and compiling profiles of the tourists within each sub-market has proved to be advantageous. Once the demands of the tourists are known, the appropriate facilities and number of facilities can be developed. Knowing who the tourists are and where to target them, will lead to better marketing, planning and promotion of the destination. Customer satisfaction will be increased, as it is known exactly who must be catered for, thereby resulting in repeat visits. The five clusters of tourists were: 'general nature tourists'; 'urban tourists'; 'hard outdoor adventure tourists'; 'visual or soft outdoor adventure tourists'; and 'agritourists'. All these tourists, except 'urban tourists', are excellent potential agritourists. The results of this study were used to compile guidelines for entrepreneurs. These guidelines could help them in deciding who to target (which clusters), what agritourism products to develop (attractions, activities and services) and how to market them (means of advertising). Appropriate accommodation types and the availability of equipment and facilities for activities also act as attractions. This study demonstrates an inexpensive method of gathering information about tourists, thereby improving marketing and planning approaches. It illustrates how the potential and practising agritourists can be divided into sub-markets. The agritourism market is a heterogeneous market and must therefore be segmented. Any entrepreneur can use the results of this market segmentation. Any future studies, similar to this one, could consist of a sample much larger. As this study was primarily based in the Western Cape, similar research should be executed in other distinct regions. It would be illuminating to see how the groups of agritourists vary according to geographical areas. / AFRIKAANSE OPSOMMING: Landelike en agritoerisme is in hulontluikende fase in Suid-Afrika. Dit bevoordeel die boer, die plaaslike gemeenskap, die landelike streek, die toeris en die land. Dit is 'n lewensvatbare opsie maar benodig meer navorsing, bestuur, beplanning en beheer om suksesvol te wees. Baie agritoerisme ondernemings is nie so geslaagd as wat dit kan wees nie. Die probleem is dat die boere/grondeienaars nie die nodige navorsing doen omtrent die aanvraag na 'n produk voordat hul dit aanbied nie, en weet ook nie watter toerismesegment hul wil bevredig nie. Om mededingend te bly moet die toeris se eienskappe verstaan word. Dit sal insae gee in watter fasiliteite en dienste om te voorsien, asook watter bronne om te benut om die agritoerismedestinasie te promoveer. Die doel van hierdie studie was om potensiële en praktiserende agritoeriste te groepeer in verskillende segmente volgens hulle voorkeure en groeps gedrag. Die doelwitte was om: 1. Potensiële en praktiserende agritoeriste se sosio-ekonomiese, demografiese en reiseienskappe te ondersoek. 2. Die rangorde van attraksies, aktiwiteite en dienste volgens gewildheid te bepaal. 3. Voorkeure van toeriste aangaande attraksies en aktiwiteite te bepaal deur gelyksoortige groeperings te kombineer. 4. Toeriste in trosgroepe met gelyksoortige voorkeure te verdeel. 5. Die sosio-ekonomiese, demografiese en reiseienskappe van verskillende toeristetrosgroepe te vergelyk. 6. Riglyne vir ondernemers/boere/grondeienaars te formuleer vir watter toeristeprodukte hul behoort te verskaf of ontwikkel en aan wie en hoe hul dit behoort te bemark. Hierdie studie het die verspreiding van vraelyste aan potensiële en praktiserende agritoeriste in winkelsentrums en plase, betrokke by agritoerisme, behels. Die vraelyste het informasie oor potensiële en praktiserende agritoeriste verskaf Een-honderd en agt vraelyste was voltooi. Die respondente het aangedui dat 'berge', 'watervalle', 'riviere', 'grootwild', 'swem', 'pieknieks', 'natuurskoonplesierritte' , 'damme/mere/panne' en 'kleinwild' die gewildste agritoerisme attraksies en aktiwiteite is. Faktoranalise is gebruik om die getal verandelikes te verminder deur soortgelyke verandelikes (attraksies) te kombineer en trosanalise te gebruik om die respondente te segmenteer in vyf trosgroepe toeriste met gelyksoortige voorkeure vir agritoerisme attraksies en aktiwiteite. Kruistabulering, frekwensies en beskrywende statistiek was gebruik om hierdie verskillende trosse te beskryf volgens hul demografiese, sosio-ekonomiese en reiseienskappe. Segmentering van die toerismemark en die saamstel van profiele van die toeriste binne elke sub-mark is voordelig bevind. As die vereistes van die toeriste bekend is, kan die gepaste fasiliteite en aantal fasiliteite ontwikkel word. Om te weet wie die toeriste is en waar om hulle te teiken sal tot beter bemarking, beplanning en promosie van die destinasie lei. Kliëntbevrediging sal toeneem, omdat ondernemers presies weet wie om te bevredig en dit sal herhaalde besoeke tot gevolg hê. Die vyf trosgroepe toeriste was: 'algemene natuurtoeriste'; 'stedelike toeriste'; 'ekstreme buitelug avontuurtoeriste' ; 'visuele of nie-ekstreme buitelug avontuurtoeriste' ; en 'agritoeriste'. Al die toeriste behalwe stedelike toeriste is uitstekende potensiële agritoeriste. Die resultate van hierdie studie is gebruik om riglyne vir ondernemers te kompileer. Hierdie riglyne kan hul help om te besluit wie om te teiken (watter trosse), watter agritoerisme produkte om te ontwikkel (attraksies, aktiwiteite en dienste) en hoe om dit te bemark (wyse van advertensie). Toepaslike akkommodasie en die beskikbaarheid van toerusting en fasiliteite vir aktiwiteite dien ook as attraksies. Hierdie studie demonstreer 'n ekonomiese manier om informasie omtrent toeriste in te win, om bemarking en beplanning te verbeter. Dit illustreer hoe die potensiële en praktiserende agritoeris ook in sub-markte ingedeel kan word. Die agritoerisme mark is 'n heterogenemark en moet dus gesegmenteer word. Enige ontwikkelaar kan die resultate van hierdie marksegmentasie gebruik. Soortgelyke navorsing behoort in die toekoms op 'n groter steekproef gedoen word. Omdat hierdie studie hoofsaaklik in die Wes-Kaap gebaseer was, behoort soortgelyke navorsing in ander bepaalde streke uitgevoer te word. Dit sal insiggewend wees om te sien hoe die groepe agritoeriste volgens geografiese streke varieer.

Thesis (MSc)--Stellenbosch University, 2003. / ENGLISH ABSTRACT: The oceanic and meteorological systems that characterize the southern African coastline are well-documented. In this thesis, these characteristics have been considered in conjunction with the analysis of a unique set of sea surface temperature (SST) data, obtained from measuring sites around the southern African coast, to determine the variability of SSTs in the immediate coastal region of southern Africa, and to demonstrate how this variability impacts on marinerelated economic activities. As part of the analysis process, various statistical techniques have been applied to the data over different time periods to establish the extent of the spatial variability of SSTs along the southern African coastline. From the results it has been possible to identify three distinctly different 'climatological' regions around the southern African coast; viz a cooler west coast region with a low annual and seasonal SST variability and a higher variability from day-ta-day, a warmer east coast region with a higher annual and seasonal SST variability and a lower variability from day-ta-day; and a temperate south coast region with a highly erratic annual, seasonal and day-ta-day SST variability. Furthermore, it has been possible to identify, albeit small, the existence of a high and a low frequency signal of 12-15 days and 40-60 days, respectively, in the three different regions. There is also evidence of the periodic occurrence of anomalously warm and cold SST events in all three regions, and a probability of <1.1% of a day-ta-day SST anomaly of >3°C (+3°C or- 3°C) occurring anywhere along the southern African coastline. The general causes of SST change have been discussed within the context of the heat budget equation. Furthermore, the effects of the variability of SST on the climate and marine life around southern Africa and the resulting impact on the various marine-related economic activities (such as aquaculture, air-sea rescue and power stations) have been identified, and shown to be both positive and negative.Finally, it should be noted, that economic infonnation relating to marine activities is closely guarded due to inter-industry competition. It has therefore been difficult to quantify the exact impact of the effects of SST variability on these activities. / AFRIKAANSE OPSOMMING: Die oseaniese en weerkundige stelsels wat die kuslyn van suidelike Afrika kenmerk is goed gedokumenteer. Die stelselkenmerke is in hierdie verhandeling ondersoek aan die hand van 'n unieke datastel van seeoppervlaktemperature (SST) afkomstig van meetplekke aan die kus van suidelike Afrika, ten einde die veranderlikheid van SST in die onmiddelike kusomgewing van suidelike Afrika vas te stel, asook om te demonstreer hoe hierdie veranderlikheid inwerk op seeverwante ekonomiese aktiwiteite. As deel van die proses van analise is verskeie statistiese metodes gebruik om die data oor verskeie tydperke te ontleed ten einde die omvang van ruimtelike veranderlikheid van SSTs langs die kus van suidelike Afrika te bepaal. Uit die resultate was dit moontlik om drie duidelike onderskeibare 'klimatologiese' streke aan die kus van suidelike Afrika te identifiseer; te wete 'n koeler weskusstreek met 'n lae jaarlikse en seisoenale SST-veranderlikheid en hoër dag-tot-dag veranderlikheid, 'n warmer ooskusstreek met 'n hoër jaarlikse en seisoenale SST-veranderlikheid en laer dag-tot-dag verandelikheid; asook 'n gematigde suidkusstreek met 'n hoogs wisselvallige jaarlikse, seisoenale en dag-totdag SST-veranderlikheid. Dit was verder moontlik om, alhoewel klein, die bestaan van lae en hoë frekwensie seine van 12-15 dae en 40-60 dae onderskeidelik in die drie streke te identifiseer. Daar is ook tekens van die periodieke voorkoms van anomale warm en koue SSTgebeurtenisse in al drie streke en 'n waarskynlikheid van <1.1% van die voorkoms van 'n dagtot- dag SST-anomaliteit van >3°C (+3°C of -3°G) op enige plek langs die suider Afrikaanse kuslyn. Die algemene oorsake van veranderings in SST is bespreek binne die konteks van die formule vir die behoud van hitte-energie. Die invloed van SST-veranderlikheid op die klimaat en die seelewe om suidelike Afrika en die gevolglike effek op mariene-verwante ekonomiese aktiwiteite (soos akwakultuur, lug-see-redding en kragstasies) is ook geïdentifiseer en is aangetoon om beide positief en negatief te wees Ten laaste dien dit gemeld te word dat ekonomiese inligting met betrekking tot mariene aktiwitweite goed bewaar word as gevolg van kompetisie in die bedryf. Dit was derhalwe moeilik om die presiese impak van die gevolge van SST-veranderlikheid op sodanige aktiwiteite te kwantifiseer.

Thesis (MA (Geography and Environmental Studies))--University of Stellenbosch, 2011. / ENGLISH ABSTRACT: Land for agricultural development gets scarcer as more and more agricultural land is being transformed by non-agricultural uses. The increased agricultural land use change in the Western Cape Province results in transformation, fragmentation and loss of productive agricultural land. With the A2 planning area of the Department of Environmental Affairs and Development Planning (DEADP), in the Boland region of the Western Cape, as its study area, this study investigates the role of legislative control measures on changes of land use from agriculture to a different form of development, by analysing the Environmental Impact Assessment (EIA) applications for the change of agricultural land use and agriculture applications for the conversion of undeveloped land for the period 1 January 1998 to 3 July 2006. The study examines the role that the relevant legislation plays in agricultural land use control; considers the nature, extent and reasons for agricultural land use change in the study area (under the Environment Conservation Act (Act 73 of 1989) (ECA)); determines the impacts associated with the transformation of agricultural land use in the study area by assessing transformation of undeveloped land applications (captured under the Conservation of Agricultural Resources Act (Act 43 of 1983) (CARA)); and measures the amount of agricultural land potentially lost to development through EIA change of land use applications (according to the DEADP database) opposed to the amount of agricultural land potentially gained through conversion of undeveloped land (according to the DoA database). Two databases were created, based on variables obtained from EIA change of agricultural land use applications authorised by DEADP [DEADP’s database] and conversion of undeveloped land for agricultural use, authorised by the Department of Agriculture (DoA)[DoA’s database]. The variables used to create DEADP’s database are the applicant, property owner, type of property, development function, year of authorisation, municipality, town, size of property, permanent and temporary jobs created, percentage of property developed, footprint of development, existing land use and unique source. The variables used to create DoA’s database are the year of authorisation, new and existing land use, year of authorisation, municipal area, property owner, percentage of property converted and footprint of development. The variables in the two databases are analysed using cross tabulations, with the variables measured against each other using pivot tables. The final tables are investigated through interpretation of the results and making recommendations for better management and planning in the future, based on relevant literature. The main findings are that DEADP gave authorisation for 416 agricultural land use change developments between 1 January 1998 and 3 July 2006, resulting in 2855 hectares of agricultural land potentially being developed. It was also found that DoA gave approval for 118 undeveloped land conversion applications, converting a total of 2589 hectares for agricultural purposes. The findings also revealed that 1707ha of this undeveloped land were covered with indigenous vegetation, while only 299ha were covered with alien vegetation. The challenge is to use valuable agricultural land optimally and sustainably for agricultural purposes. Non-agricultural developments should be kept within the urban edge and away from valuable agricultural land. If such development must take place on agricultural land, it must be done on the poorest soils and should not jeopardise agricultural activities. Keywords: land use change, undeveloped land, applicant, property owner, type of property, development function, year of authorisation, municipality, town, size of property, permanent jobs, temporary jobs, percentage of property developed, footprint of development, existing land use, new land use and unique source. / AFRIKAANSE OPSOMMING: Grond vir landbou ontwikkeling word al hoe skaarser namate meer en meer landbougrond omskep word vir ander grondgebruike. Die gevolg is dat meer landbougrond in die Wes-Kaap omskep word vir ander ontwikkelingsdoeleindes, wat lei tot transformasie, fragmentering en verlies van produktiewe landbougrond. Met die A2 beplanningsgebied van die Departement van Omgewingsake en Ontwikkelingsbeplanning (DOeOB), wat geleë is in die Boland streek van die Wes-Kaap, as studiegebied, ondersoek hierdie studie die rol van wetgewende beheermatreëls op grondgebruiksverandering vir die periode 1 Januarie 1998 tot 3 Julie 2006, deur Omgewingsimpakbepalings (OIB) aansoeke wat ‘n verandering van landbougrondgebruik insluit, asook landbou aansoeke wat die omskepping van onontwikkelde grond insluit, te ontleed. Die studie ondersoek die rol wat relevante wetgewing in landbougrondgebruikskontrole speel; analiseer die aard, omvang en redes vir landbougrondgebruiksverandering in die studiegebied soos voor aansoek gedoen in terme van die Wet op Omgewingsbewaring (Wet 73 van 1989); die impakte wat geassosieer word met transformasie van landbougrond deur verandering van landbougrondgebruik soos voor aansoek gedoen in terme van die Wet op Bewaring van Landbouhulpbronne (Wet 43 van 1983); en vergelyk die hoeveelheid landbougrond wat potensieel omskep is vir ontwikkeling deur middel van OIB verandering van grondgebruik aansoeke (volgens DOeOB databasis) teenoor die hoeveelheid nuwe landbou grond wat potensieel geskep is deur onontwikkelde grond te omskep vir landbou (volgens DvL databasis). Twee databasisse is geskep, gebaseer op veranderlikes wat verkry is uit OIB-aansoeke wat ‘n verandering van landbougrondgebruik ingesluit het en deur DOeOB goedgekeur is [DOeOB databasis] en aansoeke wat ‘n verandering van onontwikkelde grond vir landboudoeleindes insluit, goedgekeur deur die Departement van Landbou (DvL) [DvL databasis]. Die veranderlikes in die DOeOB databasis te skep sluit die volgende in: aansoeker, eienaar, tipe eiendom, tipe ontwikkeling, jaar van goedkeuring, munisipale area, dorp, groote van eiendom, permanente en tydelike werksgeleenthede geskep, proporsie van grond ontwikkel, voetspoor van ontwikkeling, bestaande grondgebruik, nuwe grondgebruik en unieke bron. Die veranderlikes in die DvL databas is: jaar van goedkeuring, nuwe en bestaande grondgebruik, munisipale area, dorp, grondeienaar, proporsie van grond ontwikkel en voetspoor van ontwikkeling. Die veranderlikes in die twee databasisse is ontleed deur kruistabelle. Die finale tabelle word geanaliseer deur die resultate te interpreteer en voorstelle te maak vir beter bestuur en beplanning in die toekoms, gebaseerd op relevante literatuur. Die hoof resultate van die studie toon dat DOeOB goedkeuring gegee het vir 416 landbougrondgebruiksveranderingontwikkelings tussen 1 Januarie 1998 en 3 Julie 2006, wat moontlik veroorsaak het dat 2855 hektaar landbougrond ontwikkel is. Die resultate dui ook dat DvL goedkeuring uitgereik het vir 118 ontwikkeling van onontwikkelde grond aansoeke, wat ’n totaal van 2589 hektaar grond potensieel omskep het vir landbou doeleindes. Die bevindinge bevestig ook dat 1707 hektaar van die onontwikkelde grond bedek was met inheemse plantegroei, terwyl slegs 299 hekaar bedek was met uitheemse plantegroei. Die uitdaging vir die toekoms is om vrugbare landbougrond optimaal en volhoubaar te gebruik vir landbou. Nie-landbou ontwikkelings moet binne die stedelike grens geskied, weg van vrugbare landbougrond. Indien ontwikkeling op landbougrond plaasvind, moet dit op lae-potensiaal landbou grond geskied en geensins landbou aktiwiteite benadeel nie. Kernwoorde: grondgebruiksverandering, onontwikkelde grond, aansoeker, eiendoms eienaar, tipe eiendom, tipe ontwikkeling, jaar van goedkeuring, munisipale area, dorp, groote van eiendom, permanente werksgeleenthede, tydeike werksgeleenthede geskep, persentasie van grond ontwikkel, voetspoor van ontwikkeling, bestaande grondgebruik, nuwe grond gebruik en unieke bron.

Thesis (MSc)--Stellenbosch University, 2012. / ENGLISH ABSTRACT: Supervised classifiers are commonly used in remote sensing to extract land cover information. They are, however, limited in their ability to cost-effectively produce sufficiently accurate land cover maps. Various factors affect the accuracy of supervised classifiers. Notably, the number of available training samples is known to significantly influence classifier performance and to obtain a sufficient number of samples is not always practical. The support vector machine (SVM) does perform well with a limited number of training samples. But little research has been done to evaluate SVM’s performance for geographical object-based image analysis (GEOBIA). GEOBIA also allows the easy integration of additional features into the classification process, a factor which may significantly influence classification accuracies. As such, two experiments were developed and implemented in this research. The first compared the performances of object-based SVM, maximum likelihood (ML) and nearest neighbour (NN) classifiers using varying training set sizes. The effect of feature dimensionality on classifier accuracy was investigated in the second experiment. A SPOT 5 subscene and a four-class classification scheme were used. For the first experiment, training set sizes ranging from 4-20 per land cover class were tested. The performance of all the classifiers improved significantly as the training set size was increased. The ML classifier performed poorly when few (<10 per class) training samples were used and the NN classifier performed poorly compared to SVM throughout the experiment. SVM was the superior classifier for all training set sizes although ML achieved competitive results for sets of 12 or more training samples per class. Training sets were kept constant (20 and 10 samples per class) for the second experiment while an increasing number of features (1 to 22) were included. SVM consistently produced superior classification results. SVM and NN were not significantly (negatively) affected by an increase in feature dimensionality, but ML’s ability to perform under conditions of large feature dimensionalities and few training areas was limited. Further investigations using a variety of imagery types, classification schemes and additional features; finding optimal combinations of training set size and number of features; and determining the effect of specific features should prove valuable in developing more costeffective ways to process large volumes of satellite imagery. KEYWORDS Supervised classification, land cover, support vector machine, nearest neighbour classification maximum likelihood classification, geographic object-based image analysis / AFRIKAANSE OPSOMMING: Gerigte klassifiseerders word gereeld aangewend in afstandswaarneming om inligting oor landdekking te onttrek. Sulke klassifiseerders het egter beperkte vermoëns om akkurate landdekkingskaarte koste-effektief te produseer. Verskeie faktore het ʼn uitwerking op die akkuraatheid van gerigte klassifiseerders. Dit is veral bekend dat die getal beskikbare opleidingseenhede ʼn beduidende invloed op klassifiseerderakkuraatheid het en dit is nie altyd prakties om voldoende getalle te bekom nie. Die steunvektormasjien (SVM) werk goed met beperkte getalle opleidingseenhede. Min navorsing is egter gedoen om SVM se verrigting vir geografiese objek-gebaseerde beeldanalise (GEOBIA) te evalueer. GEOBIA vergemaklik die integrasie van addisionele kenmerke in die klassifikasie proses, ʼn faktor wat klassifikasie akkuraathede aansienlik kan beïnvloed. Twee eksperimente is gevolglik ontwikkel en geïmplementeer in hierdie navorsing. Die eerste eksperiment het objekgebaseerde SVM, maksimum waarskynlikheids- (ML) en naaste naburige (NN) klassifiseerders se verrigtings met verskillende groottes van opleidingstelle vergelyk. Die effek van kenmerkdimensionaliteit is in die tweede eksperiment ondersoek. ʼn SPOT 5 subbeeld en ʼn vier-klas klassifikasieskema is aangewend. Opleidingstelgroottes van 4-20 per landdekkingsklas is in die eerste eksperiment getoets. Die verrigting van die klassifiseerders het beduidend met ʼn toename in die grootte van die opleidingstelle verbeter. ML het swak presteer wanneer min (<10 per klas) opleidingseenhede gebruik is en NN het, in vergelyking met SVM, deurgaans swak presteer. SVM het die beste presteer vir alle groottes van opleidingstelle alhoewel ML kompeterend was vir stelle van 12 of meer opleidingseenhede per klas. Die grootte van die opleidingstelle is konstant gehou (20 en 10 eenhede per klas) in die tweede eksperiment waarin ʼn toenemende getal kenmerke (1 tot 22) toegevoeg is. SVM het deurgaans beter klassifikasieresultate gelewer. SVM en NN was nie beduidend (negatief) beïnvloed deur ʼn toename in kenmerkdimensionaliteit nie, maar ML se vermoë om te presteer onder toestande van groot kenmerkdimensionaliteite en min opleidingsareas was beperk. Verdere ondersoeke met ʼn verskeidenheid beelde, klassifikasie skemas en addisionele kenmerke; die vind van optimale kombinasies van opleidingstelgrootte en getal kenmerke; en die bepaling van die effek van spesifieke kenmerke sal waardevol wees in die ontwikkelling van meer koste effektiewe metodes om groot volumes satellietbeelde te prosesseer. TREFWOORDE Gerigte klassifikasie, landdekking, steunvektormasjien, naaste naburige klassifikasie, maksimum waarskynlikheidsklassifikasie, geografiese objekgebaseerde beeldanalise

Thesis (MSc (Geography and Environmental Studies))--University of Stellenbosch, 2004. / 103 Leaves printed on single pages, preliminary pages i- viii and numbered pages 1-94.I ncludes bibliography, ADDENDUM A: Questionnaire document used in the research; list of tables and figures. / Digitized at 330 dpi black and white PDF format (OCR), using KODAK i 1220 PLUS scanner. / ENGLISH ABSTRACT: The subject of waste management is one that evokes a variety of debates due to the overwhelming implications on the environment and on health that are associated with the management of waste. In developing urban areas associated with informal settlements, environmental problems emanating from household solid waste management predicaments such as illegal dumping, littering and overfilling of skips have become a permanent feature. This is also the case in Lwandle a developing township in Helderberg Municipality, Western Cape. This study looks into the waste management system in Lwandle with the aim to investigate institutional settings, related socio-economic factors and resultant community perceptions, and avenues for the use of environmental education and community participation. The results show waste collection to be the responsibility of the Helderberg Municipality, but the collection operation is undertaken by a private contractor. The nature of waste collection under these arrangements is mainly determined by the nature of housing and associated accessibility. Consequently, three main methods of waste collection are used: kerbside collection; communal collection where there is use of bins and communal collection where there is use of skips. These have varying efficiency among the nine housing areas. Socioeconomic conditions, which were marked by a high level of unemployment and low incomes, determine societal attitudes. These underpin finer variations and detailed conditions of waste collection. These, in tum, establish the framework for suitable environmental education and community participation. The latter was found to be minimal. Thus, a holistic approach to the improvement of waste management that first acknowledges inherent broader societal problems such as housing and unemployment is proposed as part of the recommendations. This approach then concentrates on finer aspects such as contracts for waste collection, aspects of waste collection dependent on waste stream nature of housing areas, appropriate environmental education and community participation. / AFRIKAANSE OPSOMMING: Afvalbestuur is 'n onderwerp wat 'n verskeidenheid van debatte uitlok vanwee die geweldige implikasies vir die omgewing en vir gesondheid wat met afvalbestuur geassosieer word. In ontwikkelende stedelike gebiede wat met informele behuising geassosieer word, het omgewingsprobleme soos onwettige storting, die strooi van rommel en oorvol stortbakke wat verband hou met die hantering van vaste afval uit huise 'n permanente kenmerk geword. Dit is ook die geval by Lwandle, 'n ontwikkelende dorpsgebied te Helderberg, in die Wes-Kaap. Hierdie studie beskou die afvalbestuursisteem in Lwandle met die doel om institusionele omgewings, verwante sosio-ekonomiese faktore en die persepsies van die gemeenskap wat daaruit ontwikkel, asook moontlikhede vir die gebruik van omgewingsopvoeding en gemeenskapsbetrokkenheid, te ondersoek. Die resultate van die ondersoek toon dat die Helderberg Munisipaliteit verantwoordelik is vir die insameling van afval, maar dat die insameling deur 'n private kontrakteur uitgevoer word. Onder sulke omstandighede word die aard van afvalinsameling hoofsaaklik deur die aard van die behuising en die verwante toeganklikheid bepaal. Daarvolgens is daar drie hoofmetodes van insameling, wat deur verskillende grade van effektiwiteit gekenmerk word, vir die nege behuisingsgebiede: sypaadjie versameling; kommunale versameling in dromme; en kommunale versameling in stortbakke. Sosio-ekonomiese omstandighede, wat gekenmerk word deur 'n hoe mate van werkloosheid en lae inkomstes, bepaal gemeenskapshoudings wat deur die verskillende maniere van afvalverwydering tot stand kom en ondersteun fyner variasies en gedetailleerde omstandighede van afvalinsameling. Dit bepaal weer die raamwerk vir gepaste omgewingsopvoeding en die deelname van die gemeenskap. Die studie het getoon dat laasgenoemde minimaal is. 'n Holistiese benadering tot die verbetering van afvalbestuur, wat eerstens inherente breer gemeenskapsprobleme soos behuising en werkloosheid erken, word dus as deel van die aanbevelings voorgestel. Hierdie benadering konsentreer vervolgens op die fynere aspekte, soos kontrakte vir afvalinsameling, aspekte van afvalinsameling, gepaste omgewingsopvoeding en gemeenskapsdeelname.