| 1 | | It might be much quicker to provide the value associated with a pixel intersecting with a point geometry when using ST_Intersection() by accessing the pixel value with ST_Value instead of vectorizing the whole tile. This, obviously, do not work when the intersecting geometry is a polygon. In this case we have to vectorize the complete raster tile. |
| | 1 | It might be much quicker to provide the value associated with a pixel intersecting with a point geometry when using ST_Intersection() by accessing the pixel value with ST_Value instead of vectorizing the whole tile. We have first to fix st_value(rast, geom) so it behave exactly as st_intersect on edge of raster and pixels. |
| | 2 | |
| | 3 | This, obviously, do not work when the intersecting geometry is a line or a polygon. In this case we should try to vectorize only the intersecting part of the raster tile. |
