On 01/04/2013 07:44 PM, Tom MacWright wrote:
How about rendering the lines at z16 in black with no antialiasing and comparing the results? After that, you can cache the hash of the image and compare it to additional lines. If you want to get really fancy, you could even pack them into bits and compare the hamming weight of the difference.
Yeah, I thought about using PostGIS raster features for doing that. Looking at raster docs[1] it should be as simple as doing ST_AsRaster on the geometry, then some rescaling and comparing the two. [1] http://postgis.net/docs/manual-dev/RT_reference.html Paweł _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
