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bio website uwmike.com
location Kitchener, Canada
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visits member for 3 years, 4 months
seen Jun 12 '13 at 3:04

Apr
21
comment What's a good toolchain to reproject some PNGs in plate carre to UTM?
Aight, sweet. Thanks again so much. If I have further difficulties, I'll start a new question. :)
Apr
21
comment What's a good toolchain to reproject some PNGs in plate carre to UTM?
I was able to produce a tiff directly from the original DEM files. The next stage of my process (POVRay) didn't seem to care for the tiff until I ImageMagicked it into a 16-bit PNG. However, I'm finding that the terrain ultimately generated is of much lower quality (more stair-stepped) than with my original PNG converter. The original data is 1m vertical resolution, but I feel that maybe some of that is being lost in the TIFF stage. Is there some way to set a scale factor for gdalwarp output? I don't see it in the docs. Would I be better off to preprocess the data before using GDAL?
Apr
20
comment What's a good toolchain to reproject some PNGs in plate carre to UTM?
Okay, this looks manageable. If I generated the PNGs myself from the original *.dem files using my own Python script, then to add the georeferences to them, I just need to make my script also create a .wld file, am I right? It look like a wld file just has six unitless numbers—where in this process is the source data's projection declared?