GIS Analysis with WebGL

This example shows a browser side real-time hillshade calculation of a 1024x1024 input DEM raster. It uses WebGL technology to exploit the parallel computation power of the graphics card (GPU). That way the application computes the value of each pixel in parallel instead of classical serial computation on the main processor (CPU). You can also watch the DEM used for the calculation, SLOPE and ASPECT calculations which are a byproduct of the HILLSHADE algorithm. Try also the difference between 8 and 16 bit DEM precision.
It's faaaassssst.... CLICK TO SET SHADING TARGET Azimuth: Zenith: FPS:

DEM Precision

HILLSHADE with colored DEM
   University of Heidelberg    GIScience Group, Institute of Geography, University of Heidelberg
GIScience Research Group, Institute of Geography, University of Heidelberg
Website by Dipl.-Geogr. M. Auer
Original DEM Data by USGS, obtained from the "Large Geometric Models Archive"
of the College of Computing at the Georgia Institute of Technology, Atlanta, USA