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- Title
Avaliação de técnicas de geoprocessamento no modelo digital de terreno com dados temporais: um abalroamento abalizado na inclinação da superfície terrestre.
- Authors
Bertotti, Luiz Gilberto; Filho, Mauricio Camargo; Pelegrina, Marcos Aurélio; Boas Gomes, Marquiana Freitas Vilas; Costa Toledo, Bruno Henrique; Piasecki, João Saulo
- Abstract
The present study aimed to compare the maps of slope obtained in 1997 in the Geographic Information System (GIS, SGI/INPE), with the declivity maps generated in 2014 in the Georeferenced Information Processing System (SPRING). The input data from the testing areas, topographic maps and Shuttle Radar Topography Mission (SRTM) images were stored in SPRING databases. The test areas were built with well-defined isolines concerning the horizontal spacing between the contour lines. The Interpolation methods analyzed were: Weighted Mean/Elevation/Quadrant, Weighted Mean/Quadrant, Weighted Mean, Simple Mean, Nearest Neighbor, Linear and Quintic Surface with breaklines. All these methods were used to draw rectangular grids with 1mx1m spatial resolution. In order to obtain the Triangulated Irregular Network (TIN) grid, the interpolations used were Delaunay, lower angle and isolines. Out of these methods, we selected the TIN grid with Delaunay interpolator which allowed the generation slope image with spatial resolution of1m. This image was sliced according to slope classes generating digital declivity maps. Next, we established statistical procedures, indexes of Percentage of Accuracy (PA) and indexes of Percentage of Total Accuracy (PAT)) for the evaluation of the classes of slope and declivity areas obtained in the two periods. We concluded that the results were on average10% higher for areas classified as plan relief and over 100% higher for areas of corrugated and mountainous relief. The input data from topographic maps and SRTM image with spatial resolution of 90m were satisfactory. We observed that there were significant advances in data entry mode and in the values of each class of declivity maps when compared in both periods. When they are close to the real values, they can provide important data and information that are essential for the planning of land use in both, urban and rural areas.
- Publication
Ambiência, 2015, Vol 11, Issue 1, p215
- ISSN
1808-0251
- Publication type
Article
- DOI
10.5935/ambiencia.2015.01.13