To identify critical sediment sources in large catchments, using easily available terrain information at a regionalscale, a methodology was developed to obtain a qualitative assessment necessary for environmental management.Fargas et al method was employed in the research. The study was carried out in one of the sub-basins of Hableh Roodbasin called Dehnamak in the arid and semiarid climate of ...

Habitat classification and its applications (e.g. habitat monitoring, identification of rare species, etcetera) are important challenges researched by environmental bodies and mapping agencies. However, manual habitat classification is labour intensive, costly, subjective and time consuming (Chen and Rau, 1997). From an image processing perspective, habitat classification can be achieved using ...

In the past decade, LIght Detection And Ranging (LIDAR) has been recognised by both the commercial and public sector as a reliable and accurate source for land surveying. Object classification in LIDAR data tends towards data fusion by employing additional simultaneously recorded bands. In this paper, a supervised classification algorithm based on Maximum Likelihood is presented using high reso...

-.. .. _Measuring Waterfowl Habitat ~pulation Changes From Aerial Photos Harvey \IT. Miller Nebraska Game Commission Bassett, Nebraska A survey was conducted in 1953 to determine the feasibility of using aerial photography to measure the trends in available waterfowl habitat in the Nebraska Sandhills. This pilot survey included 96 one-square-mile sections systematically distributed over the are...

The aerial photos of Aquileia, especially the orthophotos of the last decade, allow for a new and broad vision of the ancient city’s extent. Together with V.Roberto we published some new findings. More recent orthophotos (2010), after data filtering and image processing, allow for newer insights into the roman city map .

Nowadays several areas of application need a precise 3D cartographic model, specially in the urban domain: telecommunications, urbanism, tourism and other ludicrous applications. The analysis of aerial stereoscopic photos provides a fast method to obtain a faithful relief of the observed scene, including its superstructures. This work presents the Navegador3D developed by NPDI/UFMG, ETIS/ENSEA ...

gully erosion is one of the most severe types of water erosion that inclusive and global model to represent its development under different environmental circumstances is difficult. moreover, having knowledge about history behaviors of a gully and its advancement requires direct annual monitoring that is not possible in iran conditions because of cost and time. gis and remote sensing with provi...