[Gdal-dev] gdalwarp -t_srs -s_srs
Shawn.Gong at drdc-rddc.gc.ca
Tue Jan 16 16:27:41 EST 2007
Here are a few questions regarding gdalwarp. Thanks in advance.
Q1: why do I need -s_srs (source spatial reference) ? I know this is
optional. But can't this be extract from srcfile?
Q2: -t_srs (target spatial reference) for example -t_srs "+proj=utm
+zone=50 +datum=WGS84" What if the zone is in southern hemisphere?
I used something like:
gdalwarp -t_srs "+proj=utm +zone=50K +datum=WGS84" -ts 1500 900
gdalinfo displays that dst.tif's northing as negative numbers (says it
is in northern hemisphere).
How can I specify -t_srs for southern hemisphere?
Q3: is there any detailed documentation for gdalwarp, with more
examples, instead of the 1-2 pages usage intro?
Q4: Where can I get documentation for OGR Well Known Text?
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