Abstract
The feasibility of production of topographic maps based on orbital remote sensing data was investigated for the Brazilian Amazon Region. The selected test-site was an area with a low topographic relief within the National Tapajos Forest, Para State. Two kinds of radargrammetric DEMs (Digital Elevation Models), relative and absolute, were generated based on a Fine RADARSAT-1 stereo-pair (Fine 2, Fine 5) and evaluated regarding the altimetric information content. The geometric modeling for the DEM extractions was based on the “RADARSAT-1 Specific” model from the OESE (OrthoEngine Satellite Edition, PCI Geomatics) software, an automated matching solution which takes into account slant range distances from sensor/terrain. The planimetric features were extracted from integrated Fine/TM-Landsat products. Precise planialtimetric field information from DGPS (Differential Global Positioning System) was used as GCPs (Ground Control Points) for the modeling of the absolute DEM and for the orthorectification of the radar and optical data, and as ICP (Independent Control Points), for the calculation of planialtimetric accuracies of the topographic map. The investigation has shown that the planialtimetric accuracy of the topographic map met the requirements for 1:100,000-map (class A) as requested by the Brazilian Cartographic Accuracy Pattern (PEC). The spaceborne imaging radar technology represents na alternative to aerial optical and radar data for topographic mapping at semi-detailed scale (1:100,000) in similar environments of the Brazilian Amazon. The investigation was carried out through an INPE-Geoambiente`s project with funds from the PIPE Program of FAPESP.
Paper version not known (
Free)
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call