Changes between Version 48 and Version 49 of WKTRasterTutorial01
- Timestamp:
- 06/11/10 12:58:35 (15 years ago)
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WKTRasterTutorial01
v48 v49 225 225 }}} 226 226 227 Similarly you can visuali se your own caribou point layer with this OpenJUMP query:227 Similarly you can visualize your own caribou point layer with this OpenJUMP query: 228 228 229 229 {{{ … … 231 231 FROM cariboupoints; 232 232 }}} 233 234 This 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. 233 235 234 236 Now 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... … … 282 284 == Intersecting the caribou buffers with the elevation rasters == 283 285 284 Our two coverages are now ready to be intersected. We will use the brand newst_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:286 Our 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: 285 287 286 288 {{{