[Mapserver-users] Large Raster files
mapguy
phatsbbnlist at twcny.rr.com
Tue May 18 03:53:41 PDT 2004
I have a question regarding the relationship between PROJECTION and
EXTENT for the display of layers in the mapfile (mapserve src 4.02 and
the new 4.2beta) I have managed to get a custom region working using the
mapderve cgi tutorial files as a start. I have successfully displayed
and tiled natural color ortho tiffs in EPSG:32115 (NY East state plane),
and I have succeeded with a UTM location that displays shape files in
EPSG:26918 (UTM 18N NAD83 GRS80).
I have downloaded 302 world-file-referenced tiffs with the 1:24000 scale
topo info for NYS. These are in EPSG:26918 (UTM 18NnAD83 GRS80) and the
extents, coordinate system and mapping have been verified in my GIS
program (grass 5.03). These files will not display, neither as single
maps nor as a tiled map, even though the shapefile for the TILEINDEX
(with the exact same coord parameters) displays just fine (I even got a
county line shapefile map in latlong coordinates to plot properly on the
UTM basemap). No errors in the logs. I used .tfw and .wld and internal
GeoTiff (gdal_translated) files all with the same null result.
I have searched and read the posts on related problems, and it seems I
have considered al the possibilities listed. I tried a gdalwarp into
state plane (tiff output) coordinates to see if I could "TRANSFORM" it
onto the base EPSG:26918 map, but failed to get anything more than the
blank map frame.
Is there something about UTM and EPSG I am missing, at least as they
concern mapserver?
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