TOPO & LANDFORMS
Topographic information is getting more and more accessible due to the availability of many satellite sensors acquiring data in stereo mode (IKONOS, ASTER, ALOS, SPOT, etc.) and also because of the free SRTM topographic layer offering an exceptional rich and accurate data.
At the first level, a Digital Elevation Model provides an altitude value for each pixel; this value corresponds to the average altitude within that pixel. The smaller the pixel the more accurate the absolute altitude value is for that pixel.
Based on that information we can generate contours using that first degree information. But there’s a lot more to that. When analysing this dataset at the second and at third degree we can extract Slope value, Slope direction, Channels, Ridges, Passes, Peaks, planes and pits. The DEM can also be illuminated using azimuth and Elevation values giving a visually powerful effect. The illumination can also be used to enhanced certain geological structures or finding shadows within an satellite image acquired at a certain moment during the day.
At the first level, a Digital Elevation Model provides an altitude value for each pixel; this value corresponds to the average altitude within that pixel. The smaller the pixel the more accurate the absolute altitude value is for that pixel.
Based on that information we can generate contours using that first degree information. But there’s a lot more to that. When analysing this dataset at the second and at third degree we can extract Slope value, Slope direction, Channels, Ridges, Passes, Peaks, planes and pits. The DEM can also be illuminated using azimuth and Elevation values giving a visually powerful effect. The illumination can also be used to enhanced certain geological structures or finding shadows within an satellite image acquired at a certain moment during the day.
EXAMPLES
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Hillshaded Relief
Slope Classes
PRODUCTS & SERVICES
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- World DEM at 90 m
- World Hillshaded Relief at 90 m
- South America DEM at 30 m
- Natural Disasters analysis (Landstide Susceptibility, Erosion, Inundations risks)
- Landforms and Geomorphology Mapping
- Orthorectification of satellite images using DEM and accurate control points
- Web Mapping
- Advanced training for Remote Sensing and GIS applied to Topography
IMPORTANT PROJECTS
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- Dunes mapping in West Africa;
- Landslide analysis Studies in Bolivia;
- Monitoring Lakes Waterlevels in Honduras;
- Physiographic mapping in Peru;
- Geological structure Mapping in Argentina, Peru, Brasil, Peru, Ecuador and Columbia;
- Mutlicriteria analysis for targeting for establishing vineyard locations