Thesis (Ph. D.)--Ohio State University, 2005. / Title from first page of PDF file. Document formatted into pages; contains xi, 184 p.; also includes graphics (some col.). Includes bibliographical references (p. 158-167). Available online via OhioLINK's ETD Center

No description available.

The eruption of Mount St. Helens in 1980 severely impacted the woody vegetation within the geomorphic floodplain as well as the morphology of the Upper South Fork Toutle River. Historic aerial imagery and LiDAR data were used in combination to create snapshots of the channel and vegetation in 1980, 1983, 1996, 2003, and 2014. This data was mapped and analyzed using GIS, with the primary focus on 2D channel change, vegetation change, and channel-vegetation interactions from 1980 to 2014. No vegetation was discernable in 1980-83 but the vegetation present in 1996 increased in area and in density from 1996 to 2014. The number of channels locations were dependent on vegetation density and presence while vegetation growth occurred predominately in areas previously occupied by the channel.

Made available in DSpace on 2014-06-11T19:31:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-12-15Bitstream added on 2014-06-13T19:42:02Z : No. of bitstreams: 1 silva_eg_dr_botfca.pdf: 1092618 bytes, checksum: 2cecd410091c2837654b5683e84fd1b8 (MD5) / O desenvolvimento da agricultura e o uso da terra de maneira não somente a protegê-la contra alterações superficiais provocadas pela ação constante dos fenômenos naturais, mas também a desenvolver aos poucos sua capacidade produtiva, requer um cuidadoso planejamento inicial. Para que o mesmo seja efetivo e eficiente, é necessário que se tenha acesso a informações corretas e detalhadas, as quais podem estar disponíveis em imagens aéreas de sensoriamento remoto. O uso das fotografias aéreas verticais dentre os produtos do Sensoriamento Remoto se tornou cada vez mais frequente nos projetos de levantamentos, planejamentos e explorações do solo, principalmente porque substitui, com vantagens, outras bases cartográficas, além da riqueza de detalhes que oferece, eliminando-se assim as dificuldades de acesso em áreas inacessíveis, bem como facilitando a visão tridimensional, por aumentar o rendimento e a precisão do mapeamento, por meio da combinação dos trabalhos de campo e laboratório, com o estudo de interpretação fotográfica. Este trabalho utilizou-se de fotografias aéreas pancromáticas nas escalas nominais 1:25000 (1962), 1:45000 (1977) e coloridas na escala nominal aproximada de 1:30.000, proveniente do levantamento aerofotogramétrico efetuado no ano de 2005, tendo como objetivo mostrar através da utilização de um Sistema de Informação Geográfica (SIG) a possibilidade de realizar uma análise mais completa e segura de valores de área, obtidos diretamente na foto sem correções de escala, e posteriormente compará-los com os valores de área obtidos de fotografias aéreas com escalas corrigidas, tendo como referência a carta do Instituto Geográfico e Cartográfico do Estado de São Paulo, resultando num coeficiente de erro que mostrará as diferenças das áreas através... / interpretation is a basic resource and it constitutes in a technique which enables infinite refining. Agricultural development and ground use requires a careful initial planning in order not only to protect them against superficial changing provoked by natural phenomena but also to gradually develop its productive capacity. For the efficiency of ground management, it is necessary to access correct and detailed information which can be available through aerial images of remote sensing. The use of vertical aerial photography through Remote Sensing has become more common in ground collection, management and exploration, mainly because it substitutes, with lots f advantage, for cartographic bases, besides offering detailed characteristics, eliminating access difficulties in inaccessible areas, as well as facilitating a tridimensional view once it increases map efficiency and accuracy by combining field and laboratory work with photography interpretation. This work, using panchromatic aerial photography in nominal scale 1:25000 (1962), 1:45000 (1977) , and approximate nominal scale of 1:30.000, proceeding from aerial photogrameter developed in 2005, aimed at showing through the Geographic Information System (GIS) the possibility of developing a more complete and accurate analysis of the area values, obtained directly from photos without scale correction, and after comparing it with area values obtained from aerial photography with correct scale referred in IGC (Brazilian Cartography and Geography Institute) guidelines, resulting in an error coefficient which shows area differences through two proposed study. Considering the aerial photographies in three different years: 192, 1977 and 2005, it is possible to affirm that the 2005’s images presented lower values of area difference... (Complete abstract click electronic access below)

Resumo: O desenvolvimento da agricultura e o uso da terra de maneira não somente a protegê-la contra alterações superficiais provocadas pela ação constante dos fenômenos naturais, mas também a desenvolver aos poucos sua capacidade produtiva, requer um cuidadoso planejamento inicial. Para que o mesmo seja efetivo e eficiente, é necessário que se tenha acesso a informações corretas e detalhadas, as quais podem estar disponíveis em imagens aéreas de sensoriamento remoto. O uso das fotografias aéreas verticais dentre os produtos do Sensoriamento Remoto se tornou cada vez mais frequente nos projetos de levantamentos, planejamentos e explorações do solo, principalmente porque substitui, com vantagens, outras bases cartográficas, além da riqueza de detalhes que oferece, eliminando-se assim as dificuldades de acesso em áreas inacessíveis, bem como facilitando a visão tridimensional, por aumentar o rendimento e a precisão do mapeamento, por meio da combinação dos trabalhos de campo e laboratório, com o estudo de interpretação fotográfica. Este trabalho utilizou-se de fotografias aéreas pancromáticas nas escalas nominais 1:25000 (1962), 1:45000 (1977) e coloridas na escala nominal aproximada de 1:30.000, proveniente do levantamento aerofotogramétrico efetuado no ano de 2005, tendo como objetivo mostrar através da utilização de um Sistema de Informação Geográfica (SIG) a possibilidade de realizar uma análise mais completa e segura de valores de área, obtidos diretamente na foto sem correções de escala, e posteriormente compará-los com os valores de área obtidos de fotografias aéreas com escalas corrigidas, tendo como referência a carta do Instituto Geográfico e Cartográfico do Estado de São Paulo, resultando num coeficiente de erro que mostrará as diferenças das áreas através... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract : interpretation is a basic resource and it constitutes in a technique which enables infinite refining. Agricultural development and ground use requires a careful initial planning in order not only to protect them against superficial changing provoked by natural phenomena but also to gradually develop its productive capacity. For the efficiency of ground management, it is necessary to access correct and detailed information which can be available through aerial images of remote sensing. The use of vertical aerial photography through Remote Sensing has become more common in ground collection, management and exploration, mainly because it substitutes, with lots f advantage, for cartographic bases, besides offering detailed characteristics, eliminating access difficulties in inaccessible areas, as well as facilitating a tridimensional view once it increases map efficiency and accuracy by combining field and laboratory work with photography interpretation. This work, using panchromatic aerial photography in nominal scale 1:25000 (1962), 1:45000 (1977) , and approximate nominal scale of 1:30.000, proceeding from aerial photogrameter developed in 2005, aimed at showing through the Geographic Information System (GIS) the possibility of developing a more complete and accurate analysis of the area values, obtained directly from photos without scale correction, and after comparing it with area values obtained from aerial photography with correct scale referred in IGC (Brazilian Cartography and Geography Institute) guidelines, resulting in an error coefficient which shows area differences through two proposed study. Considering the aerial photographies in three different years: 192, 1977 and 2005, it is possible to affirm that the 2005's images presented lower values of area difference... (Complete abstract click electronic access below) / Orientador: Zacarias Xavier de Barros / Coorientador: Sergio Campos / Banca: Muricy Domingues / Banca: Otavio Yassuo Itame / Banca: Lincoln Gering Cardoso / Banca: Osmar Delmanto Junior / Doutor

Bibliography: pages 123-133. / The hypothesis was advanced that comparative interpretation of multi-temporal aerial photographs can be used as a tool in Environmental Impact Analysis (EIA). To test this hypothesis a site, Silwerstroomstrand, approximately 40 kilometres north of Cape Town on the West coast was chosen. An analysis of the site was carried out using aerial photographs taken in 1938, 1960, 1968, 1971, 1977, 1981 and 1983 at scales ranging from 1:7 000 to 1:50 000. Development of the site for recreation began in 1972 and in 1976 for water extraction. Pre-development photographs, 1938, 1960, 1968 and 1971, were stereoscopically compared and the observations were interpreted using a systems approach. From the analysis of the photographs and information on past landuse, the dynamics of the site were described with particular attention to the response of that environment to perturbations such as fire and removal of vegetation. Development actions were analysed to establish any similarity to past perturbations and on the basis of similarities, predictions of probable future responses of the site (and hence impacts) were made. The predicted impacts were compared with: 1. the interpretation of post-development photographs. 2. Impacts identified by a multi-disciplinary panel after a visit to the site. It was found that the major limitation of multi-temporal aerial photographs was the spatial resolution of the early (pre 1970) photographs. However, the capabilities of the tool for quantitative and semi-quantitative data gathering; promoting an understanding of spatial and temporal relationships; monitoring change; communicating information and the fact that it is economical means that it has a positive contribution to make to Environmental Impact Analysis is suggested that the optimal use of the tool of comparative interpretation of multi-temporal aerial photography is to combine it with other tools such as site visits and multi-disciplinary panels.

No description available.

No description available.

No description available.

No description available.