Hi, I've been generating hillshade images using the SRTM3 data, these are looking good but I've noticed some artifacts around the area of the Southern Alps of New Zealand. These can be seen in this sample image: http://test.geosmart.co.nz/images/relief-artifacts.png
Being a little bit new to this I'm neither sure of why the artifacts exist and how to remove them in the processing of the data. So far I've experimented with some of the options to gdalwarp, on the Hiking/Biking maps wiki page it was suggested to pass "-wt Float32 -ot Float32" to the gdalwarp call - I observed no difference with these options. I also tried setting the error threshold '-et' option to 0 which had no effect. Any suggestions on how to tackle this problem are much appreciated. Cheers Adam _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
