Changes between Version 48 and Version 49 of WKTRasterTutorial01


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Timestamp:
Jun 11, 2010, 12:58:35 PM (11 years ago)
Author:
pracine
Comment:

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  • WKTRasterTutorial01

    v48 v49  
    225225}}}
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    227 Similarly you can visualise your own caribou point layer with this OpenJUMP query:
     227Similarly you can visualize your own caribou point layer with this OpenJUMP query:
    228228
    229229{{{
     
    231231    FROM cariboupoints;
    232232}}}
     233
     234This fake caribou layer is distributed very differently than our original one and does not really look like a caribou distribution but this does not matter for the rest of the tutorial.
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    234236Now that we have our two coverages loaded in the database and that we are confident about their values and spatial reference, let's start doing some analysis queries...
     
    282284== Intersecting the caribou buffers with the elevation rasters ==
    283285
    284 Our two coverages are now ready to be intersected. We will use the brand new st_intersection() function and st_intersects() operator which operates directly on raster and geometries by vectorizing only the necessary part of the raster before doing the intersection and is one of the main feature of PostGIS WKT Raster: 
     286Our two coverages are now ready to be intersected. We will use the st_intersection() function and st_intersects() operator which operates directly on raster and geometries by vectorizing only the necessary part of the raster before doing the intersection and is one of the main feature of PostGIS WKT Raster: 
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    286288{{{