Changes between Version 103 and Version 104 of WKTRasterTutorial01


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Timestamp:
Jan 17, 2011, 11:13:15 AM (11 years ago)
Author:
pracine
Comment:

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  • WKTRasterTutorial01

    v103 v104  
    1414 * is not only a raster format but a SQL raster manipulation and analysis API
    1515
     16NOTE: Since its integration into PostGIS 2.0, PostGIS WKT Raster is now simply called "PostGIS raster". Note also that "gdal2wktraster.py" has been renamed "raster2pgsql.py" in PostGIS 2.0.
    1617
    1718Basically the problem introduced in this tutorial 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 not easy to do in ANY GIS package is the size of the datasets involved (900 MB of raster data), the simplicity of the queries and the speed at which we will get the results.