Forest ecosystems have recently received worldwide attention due to their biological diversity and their major role in the global carbon balance. Detecting forest cover change is crucial for reporting forest status and assessing the evolution of forested areas. However, existing change detection approaches based on satellite remote sensing are not quite appropriate to rapidly process the large volume of earth observation data. Recent advances in image segmentation have led to new opportunities for a new object-based monitoring system. <br> <br> This thesis aims at developing and evaluating an automated object-based change detection method dedicated to high spatial resolution satellite images for identifying and mapping forest cover changes in different ecosystems. This research characterized the spectral reflectance dynamics of temperate forest stand cycle and found the use of several spectral bands better for the detection of forest cover changes than with any single band or vegetation index over different time periods. Combining multi-date image segmentation, image differencing and a dedicated statistical procedure of multivariate iterative trimming, an automated change detection algorithm was developed. This process has been further generalized in order to automatically derive an up-to-date forest mask and detect various deforestation patterns in tropical environment.<br> <br> Forest cover changes were detected with very high performances (>90 %) using 3 SPOT-HRVIR images over temperate forests. Furthermore, the overall results were better than for a pixel-based method. Overall accuracies ranging from 79 to 87% were achieved using SPOT-HRVIR and Landsat ETM imagery for identifying deforestation for two different case studies in the Virunga National Park (DRCongo). Last but not least, a new multi-scale mapping solution has been designed to represent change processes using spatially-explicit maps, i.e. deforestation rate maps. By successfully applying these complementary conceptual developments, a significant step has been done toward an operational system for monitoring forest in various ecosystems.

Having experienced climatic warming before, First Nations people of the Albany River basin in sub-arctic, Canada, have already shown the ability to be adaptable to external influences. However, societal changes and the current accelerated rate of environmental change have reduced First Nations people ability to adapt. In addition, young people are no longer going out on the land as much. Fort Albany First Nation community members have commented on the lack of connection that some youth have with the land. A disconnect with the environment by youth can threaten the adaptive capacity of sub-arctic First Nations. As identified by Fort Albany First Nation community members, one potential tool that could influence the youth to become more aware of their land, is the collaborative geomatics tool. The collaborative geomatics tool is based on the WIDE (Web Informatics Development Environment) software toolkit. The toolkit was developed by The Computer Systems Group of the University of Waterloo to construct, design, deploy and maintain complex web-based systems. The collaborative geomatics tool supports a common reference map, based on high-resolution imagery. Three environmental outreach camps were held from 2011-2012, programming utilized place-based education as the platform to engage youth in their environment and community and begin using the associated mapping technology. All camps utilized the newly developed collaborative-geomatics tool and a camera ready handheld Global Positioning System (GPS) while participating in various activities that engaged them in their community and environment. The outreach program worked well in connecting youth with knowledgeable community members allowing for the direct transfer of traditional knowledge in a culturally appropriate manner, that is, learning through observation and doing, as well as other culturally-appropriate educational strategies. In addition, the informatics tool supported the archiving of this knowledge through the uploading of geospatially tagged pictures taken by the youth.

The scale of the affordable housing problem in Canada is enormous and the situation is worsening due to a number of recent social trends. Continued wealth inequality, an aging population, increased immigration, changing marriage and independence trends, and increased part-time employment, have all contributed to a growing affordable housing problem in Canada. Certain groups such as single parents, recent immigrants, seniors living alone and tourism/seasonal workers are particularly vulnerable. In Canada, cities and tourism-based communities have the most pronounced affordable housing shortages, and this is expected to continue in the future. New and innovative methods of public participation are needed in dealing with the challenges of affordable housing development. Spatial information technology such as Internet-based collaborative geospatial software aims to improve the public participation process. This technology is able to use the Internet, spatial data and carefully designed interfaces in order to engage citizens and increase community participation for difficult planning problems such as affordable housing development. This thesis focuses on three objectives. The first objective is to define a collaborative, spatially-aware approach to create and assess affordable housing options in Collingwood, Ontario. This approach will use existing spatial data, participants with a vested interest in affordable housing, and an open source geospatial software tool called MapChat. The second objective is to implement the defined approach in a real-world setting in order to generate participatory input. The third and final thesis objective is to examine the spatial patterns of existing affordable housing and the locations generated in the study to determine sites that are most suitable for future affordable housing development in Collingwood. The results of the thesis show that the approach used provides a proof of concept in the use of Internet-based collaborative geospatial software that can be applied to any town in Canada. Although the approach involved a modest study design, it was able to offer a number of potential advances in planning the locations of future affordable housing. The approach was successful in creating a set of potential affordable housing options, was effective in assessing those scenarios and was feasible to implement in a real-world setting. In addition, the approach had high potential in the generation and management of information and in supporting community participation and empowerment.

The scale of the affordable housing problem in Canada is enormous and the situation is worsening due to a number of recent social trends. Continued wealth inequality, an aging population, increased immigration, changing marriage and independence trends, and increased part-time employment, have all contributed to a growing affordable housing problem in Canada. Certain groups such as single parents, recent immigrants, seniors living alone and tourism/seasonal workers are particularly vulnerable. In Canada, cities and tourism-based communities have the most pronounced affordable housing shortages, and this is expected to continue in the future. New and innovative methods of public participation are needed in dealing with the challenges of affordable housing development. Spatial information technology such as Internet-based collaborative geospatial software aims to improve the public participation process. This technology is able to use the Internet, spatial data and carefully designed interfaces in order to engage citizens and increase community participation for difficult planning problems such as affordable housing development. This thesis focuses on three objectives. The first objective is to define a collaborative, spatially-aware approach to create and assess affordable housing options in Collingwood, Ontario. This approach will use existing spatial data, participants with a vested interest in affordable housing, and an open source geospatial software tool called MapChat. The second objective is to implement the defined approach in a real-world setting in order to generate participatory input. The third and final thesis objective is to examine the spatial patterns of existing affordable housing and the locations generated in the study to determine sites that are most suitable for future affordable housing development in Collingwood. The results of the thesis show that the approach used provides a proof of concept in the use of Internet-based collaborative geospatial software that can be applied to any town in Canada. Although the approach involved a modest study design, it was able to offer a number of potential advances in planning the locations of future affordable housing. The approach was successful in creating a set of potential affordable housing options, was effective in assessing those scenarios and was feasible to implement in a real-world setting. In addition, the approach had high potential in the generation and management of information and in supporting community participation and empowerment.

The Western James Bay region of northern Ontario (the Mushkegowuk Territory) is home to some of Canada’s largest wetlands and most pristine ecosystems. This region is also home to approximately 10,000 Omushekgo Cree who inhabit four First Nation communities. Environmental change due to climate change and major resource development are a reality to the people of this sub-arctic region. Furthermore, it is predicted that climate change will have amplified impacts in northern climates. Climate change has and will continue to have impacts on the distribution of species in arctic and sub-arctic ecosystems. To date, it is not clear to what extent these distributional changes in species due to climate change will have on First Nations’ place-based relationship with the land and what measures the Cree will take to adapt to these changes. The University of Waterloo’s Computer Systems Group has developed an approach and toolkit for the development of web-based, spatial data and information management systems referred to as collaborative geomatics. This system allows for place-based information, environmental and traditional environmental knowledge (TEK) storage and sharing between First Nation communities. And allows for the development of adaptive strategies and plans for future land use activities in the face of further resource development. This collaborative geomatic system has been designed with First Nation input and has been demonstrated to Chiefs and Councils of the Mushkegowuk Territory. Collaborative geomatics is an interactive, web-based, informatics tool that has been designed to store data, in a secure and culturally-appropriate framework on high-resolution satellite imagery. High-resolution imagery will become the backdrop to placed-based and TEK data. Community members will have the ability to input locations (e.g., significant sites, such as, seasonal camps and hunting locations) on the map in addition to uploading tabular and media data. This allows for the generation of dynamic and robust spatially-relevant information and knowledge-base. Beginning in August of 2009, formal and informal meetings were held with personnel from the Lands and Resources unit of Mushkegowuk Council, First Nations Chiefs and Councils (the elected local government), and other community members of MooseCree First Nation, Fort Albany First Nation, Kashechewan First Nation, Attawapiskat First Nation, and Weenusk First Nation to gather their assessment (i.e., viability) of the Mushkegowuk collaborative geomatics tool. Together with this formative assessment process, 16 semi-directive interviews (from October 2010 to February 2011) were conducted with community members of Fort Albany First Nations. Interview participants were purposively sampled and included: Chief & Council members, First Nation office personnel, education personnel, health services personnel, elders (≥60 years of age), and young adults. Each interview was audio recorded and transcribed verbatim. Following an adapted grounded theory methodological approach, the transcripts of each interview were coded and categorized according to themes. Throughout the assessment process, the research team received constructive feedback on the system. Each participant noted the utility of the tool to be used in the education of younger generations. Furthermore, participants felt that they would be able to use the tool to store TEK and help monitor environmental change. The greatest strength of the system was seen to be the visualization of information in numerous media forms (pictures and videos), while the greatest perceived weakness of the system was the security of the information. However, once user accessibility (usernames and passwords) was explained the concern over security of information was greatly reduced. This collaborative geomatic system has the potential to enhance the Mushkegowuk First Nations’ adaptive capacity to address environmental change by allowing them to make informed decisions, utilizing the knowledge stored in the collaborative geomatics tool.

Thesis (M. Geomatics Sc.) -- Dept. Geomatics, Univ. of Melb.

Closed depressions, low elevation features in a landscape with no outlet point, play an important role in both surface and subsurface hydrology. These depressions, which are common in hummocky morainal landscapes, pool incoming surface flow, promoting infiltration and facilitating leaching of surface pollutants into vital groundwater resources. Due to the cost of ground based identification in large areas and difficulties with the identification of irregular depressions, remote identification using digital elevation models (DEMs) stands as a practical and effective tool for the mapping of these closed depressions. A modified stochastic depression identification algorithm was used in this study to characterize depressions in the Waterloo and Paris-Galt-Guelph moraines of Southwestern Ontario. The simulation output was a map of depressions in the study area. Depressions were corroborated using GRCA Wetlands data, Google Street View imagery, SWOOP 2006 orthophotos and field validation. Depression corroboration showed that the algorithm was able to accurately identify the location of closed depressions containing wetlands and closed depressions that are dry (largely due to wetland draining) in the hummocky topography of the study site. This research has implications for depression mapping in the field of digital terrain analysis as it enables the identification of real depressions in large study areas with a moderate resolution DEM. Providing a means of efficiently mapping closed depressions is important because of the role closed depressions play in the recharge of important groundwater stores. / Natural Resources Canada

The objective of this thesis is to constrain the fundamental hydrogeological processes of a large crystalline fractured rock watershed in the Canadian Shield. The fundamental hydrogeological processes of groundwater recharge, flow and discharge are examined individually as well as holistically using a revised conceptual model. The study area is the topographically-subdued Tay River watershed in eastern Ontario where a thin veneer of soil overlies Precambrian crystalline rocks and Paleozoic sediments. Spatial scales from local-scale (100s m2 to 1 km2) to watershed-scale (>100 km2) are examined. Recharge processes are defined using hydrogeological characterization, numerical simulation and isotopic, thermal and hydraulic responses to a snowmelt event. Soil thickness and bedrock transmissivity are highly heterogeneous at the local scale. Cold, 2H depleted snowmelt locally recharged the bedrock aquifer to depths of at least 20 m within two days. This rapid recharge process is localized to areas where the soil is very thin whereas slow recharge is likely widespread. The impact of lineaments on groundwater flow at the watershed-scale is examined using geomatic analysis, hydrogeological characterization, numerical simulation and fracture mapping. Lineaments are interpreted as structural features because the two principal lineament sets are oriented parallel to fracture and fault orientations. The fractured bedrock underlying lineaments generally consists of poorly connected zones of reduced permeability suggesting lineament can be barriers to recharge and flow in this setting. Natural conservative, radioactive, and thermal tracers are integrated with streamflow measurements and a steady-state advective model to delimit the discharge locations and quantify the discharge flux to lakes, wetlands, creeks and the Tay River. The groundwater discharge rate to most surface water bodies is low. Groundwater discharge is distributed across the watershed rather than localized around lineaments or zones of exposed brittle fractures. In the revised conceptual model, recharge is considered two separate processes, groundwater flow is compartmentalized and the discharge flux is considerably lower than porous media watersheds. This thesis provides a better understanding of fundamental hydrogeological processes in a large crystalline fractured rock watershed which impacts the sustainability of water resources and ecology. / Thesis (Ph.D, Civil Engineering) -- Queen's University, 2009-07-13 14:51:25.244

Stationsetablering innebär bestämning av ett mätinstruments fysiska läge och orienterad riktning. I dagens bygg- och anläggningsbransch används nästan uteslutande fri station för att etablera en stationspunkt för mätningar. På en byggplats är tillgången till referensobjekt ofta begränsad. Instrumentets placering blir därför en kompromiss mellan tillgång till referensobjekt och tillgång till den plats där inmätning respektive utsättning skall ske. Denna kompromiss ger upphov till skiftande geometriska konfigurationer hos referensobjekten, vilka påverkar mätresultatet. Studiens syfte är att undersöka om simuleringar av fria stationsuppställningar i Svensk Byggnadsgeodesis (SBG:s) programvara Geo verifieras av fältmätningar och efterföljande beräkningar av osäkerhetsparametrar orsakade av konfiguration och mätta längder och riktningar. Delmål var att etablera ett testnät för att sedan genomföra simulering och fältmätning av fri stationsetablering mot. Analysen av fri stationsuppställning innefattade endast simulering och fältmätning i plan, med parametrarna X, Y och riktning. I samtliga konfigurationer verifieras simuleringarna av fältmätningarna genom att redovisade osäkerhetsellipser, till form och utbredning, överensstämmer. Detta innebär att genom simulering i SBG Geo kan svagheter i konfigurationer upptäckas och undvikas vid fältmätning, vilket är både tids- och resurssparande. Studiens slutsats är; Simulera mera. Simulering i SBG Geo visar god överensstämmelse med fältmätning och är där med ett effektivt planeringsverktyg för mätning samt att vid etablering av fri station bör referensobjekten placeras så att stationspunkten interpoleras för lägst osäkerhet. Faktorer att beakta vid fri station är, enligt studien: konfigurationen, mätningarnas kvalitet och att tillräcklig kontrollerbarhet (k-tal) föreligger / Station setup involves determination of the measuring instruments physical location and orientation. In today's construction industry free station is almost exclusively used to establish a station point for measurements. On a construction site, access to reference objects is often limited. The instruments placement therefore becomes a compromise between access to the reference objects and access to the site where surveying will take place. This compromise results in varying geometric configurations of the reference objects, which affect the results of the survey. This study aims to investigate whether the simulations of free station setups in Svensk Byggnadsgeodesis ( SBG's ) software Geo is verified by field measurements and subsequent calculations of uncertainty parameters caused by configuration and surveyed distances and directions. One objective of this study was to establish a test network of reference objects, which simulation and field measurement of free station were established against. The analysis of free station setup included only simulation and field measurement of plane surveying, with the parameters X, Y and direction. In all configurations, the simulations were verified by the field measurements by consistent corresponding of the shape of the error ellipses. This means that by simulation of SBG Geo, weaknesses in configurations can be detected and avoided during field survey, which saves both time and resources. Factors to consider when establishing free station is, according to the study: configuration, quality of the measurements and sufficient controllability (K-tal). The study concludes; simulate more. Simulation in SBG Geo show good representation of field measurements and is therefore an effective planning tool for field surveying. When establishing free station reference objects should be positioned so that the station point is interpolated for the lowest uncertainty

The Western James Bay region of northern Ontario (the Mushkegowuk Territory) is home to some of Canada’s largest wetlands and most pristine ecosystems. This region is also home to approximately 10,000 Omushekgo Cree who inhabit four First Nation communities. Environmental change due to climate change and major resource development are a reality to the people of this sub-arctic region. Furthermore, it is predicted that climate change will have amplified impacts in northern climates. Climate change has and will continue to have impacts on the distribution of species in arctic and sub-arctic ecosystems. To date, it is not clear to what extent these distributional changes in species due to climate change will have on First Nations’ place-based relationship with the land and what measures the Cree will take to adapt to these changes. The University of Waterloo’s Computer Systems Group has developed an approach and toolkit for the development of web-based, spatial data and information management systems referred to as collaborative geomatics. This system allows for place-based information, environmental and traditional environmental knowledge (TEK) storage and sharing between First Nation communities. And allows for the development of adaptive strategies and plans for future land use activities in the face of further resource development. This collaborative geomatic system has been designed with First Nation input and has been demonstrated to Chiefs and Councils of the Mushkegowuk Territory. Collaborative geomatics is an interactive, web-based, informatics tool that has been designed to store data, in a secure and culturally-appropriate framework on high-resolution satellite imagery. High-resolution imagery will become the backdrop to placed-based and TEK data. Community members will have the ability to input locations (e.g., significant sites, such as, seasonal camps and hunting locations) on the map in addition to uploading tabular and media data. This allows for the generation of dynamic and robust spatially-relevant information and knowledge-base. Beginning in August of 2009, formal and informal meetings were held with personnel from the Lands and Resources unit of Mushkegowuk Council, First Nations Chiefs and Councils (the elected local government), and other community members of MooseCree First Nation, Fort Albany First Nation, Kashechewan First Nation, Attawapiskat First Nation, and Weenusk First Nation to gather their assessment (i.e., viability) of the Mushkegowuk collaborative geomatics tool. Together with this formative assessment process, 16 semi-directive interviews (from October 2010 to February 2011) were conducted with community members of Fort Albany First Nations. Interview participants were purposively sampled and included: Chief & Council members, First Nation office personnel, education personnel, health services personnel, elders (≥60 years of age), and young adults. Each interview was audio recorded and transcribed verbatim. Following an adapted grounded theory methodological approach, the transcripts of each interview were coded and categorized according to themes. Throughout the assessment process, the research team received constructive feedback on the system. Each participant noted the utility of the tool to be used in the education of younger generations. Furthermore, participants felt that they would be able to use the tool to store TEK and help monitor environmental change. The greatest strength of the system was seen to be the visualization of information in numerous media forms (pictures and videos), while the greatest perceived weakness of the system was the security of the information. However, once user accessibility (usernames and passwords) was explained the concern over security of information was greatly reduced. This collaborative geomatic system has the potential to enhance the Mushkegowuk First Nations’ adaptive capacity to address environmental change by allowing them to make informed decisions, utilizing the knowledge stored in the collaborative geomatics tool.