Changes between Version 4 and Version 5 of WKTRasterTutorial01


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Timestamp:
Jun 10, 2010, 1:39:56 PM (12 years ago)
Author:
pracine
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  • WKTRasterTutorial01

    v4 v5  
    1 = WKT Raster Tutorial 1 =
    2 
    3 = Intersecting vector buffers with large raster coverage using PostGIS WKT Raster =
     1= WKT Raster Tutorial 1 - Intersecting vector buffers with large raster coverage using PostGIS WKT Raster =
    42
    53This exercise will show you how to do a very classical raster/vector analysis with PostGIS WKT Raster. Basically the problem is to compute the mean elevation for buffers surrounding a series of point representing caribou observations. You can do this kind of analysis pretty easily in any GIS package but what is special here and is not easy to do in ANY GIS package is the size of the datasets used (900 MB or raster data), the simplicity of the queries and the speed at which we will get the results.