[mapserver-users] Mapserver and raster layers
Stephen Woodbridge
woodbri at swoodbridge.com
Sun Apr 17 00:11:57 EDT 2011
Sorry, you had posted the gdalinfo, I was rushing out the door and
missed that. But looking at it the image extents looks strange, it seems
that the north-south coordinates are inverted.
Upper Left (-123.8600311, 38.0116386) (123d51'36.11"W, 38d 0'41.90"N)
Lower Left (-123.8600311, 53.7055626) (123d51'36.11"W, 53d42'20.03"N)
Upper Right ( -97.1885986, 38.0116386) ( 97d11'18.96"W, 38d 0'41.90"N)
Lower Right ( -97.1885986, 53.7055626) ( 97d11'18.96"W, 53d42'20.03"N)
lower left should be the xmin, ymin and upper right should be the xmax,
ymax values and so that looks weird.
Otherwise I'm not seeing a problem. You might need to specify an image
mode that you want mapserver to render you image in:
IMAGETYPE jpeg
-Steve W
On 4/16/2011 5:52 PM, Christopher Dedels wrote:
> gdalinfo output for my raster file is:
>
> Driver: GTiff/GeoTIFF
> Files: /tmp/image.tiff
> Size is 800, 600
> Coordinate System is:
> GEOGCS["WGS 84",
> DATUM["WGS_1984",
> SPHEROID["WGS 84",6378137,298.257223563,
> AUTHORITY["EPSG","7030"]],
> AUTHORITY["EPSG","6326"]],
> PRIMEM["Greenwich",0],
> UNIT["degree",0.0174532925199433],
> AUTHORITY["EPSG","4326"]]
> Origin = (-123.860031127930000,38.011638641357401)
> Pixel Size = (0.033339290618897,0.026156539916992)
> Metadata:
> AREA_OR_POINT=Area
> Image Structure Metadata:
> INTERLEAVE=BAND
> Corner Coordinates:
> Upper Left (-123.8600311, 38.0116386) (123d51'36.11"W, 38d 0'41.90"N)
> Lower Left (-123.8600311, 53.7055626) (123d51'36.11"W, 53d42'20.03"N)
> Upper Right ( -97.1885986, 38.0116386) ( 97d11'18.96"W, 38d 0'41.90"N)
> Lower Right ( -97.1885986, 53.7055626) ( 97d11'18.96"W, 53d42'20.03"N)
> Center (-110.5243149, 45.8586006) (110d31'27.53"W, 45d51'30.96"N)
> Band 1 Block=800x2 Type=Float32, ColorInterp=Gray
>
> Regards,
>
> Chris
>
> On Sat, Apr 16, 2011 at 5:47 PM, Stephen Woodbridge
> <woodbri at swoodbridge.com <mailto:woodbri at swoodbridge.com>> wrote:
>
> What does:
>
> gdalinfo /tmp/image.tif
>
> report?
>
> -Steve W
>
>
>
> On 4/16/2011 4:52 PM, Christopher Dedels wrote:
>
> Hmmm...missed that one. But changing the units to dd still
> doesn't have
> any effect.
>
> I am using mapserver 4.8.1. DEBUG is not an option in this version.
> mapserv -v produces the following output:
>
> MapServer version 4.8.1 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG
> OUTPUT=WBMP
> OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER
> SUPPORTS=GEOS INPUT=EPPL7 INPUT=POSTGIS INPUT=GDAL INPUT=SHAPEFILE
>
> My request uri is:
> http://localhost/cgi-bin/mapserv?MAP=/tmp/mapNl7O7H.map&LAYERS=ALL&MODE=MAP
> <http://localhost/cgi-bin/mapserv?MAP=/tmp/mapNl7O7H.map&LAYERS=ALL&MODE=MAP>
> <http://localhost/cgi-bin/mapserv?MAP=/tmp/mapNl7O7H.map&LAYERS=ALL&MODE=MAP
> <http://localhost/cgi-bin/mapserv?MAP=/tmp/mapNl7O7H.map&LAYERS=ALL&MODE=MAP>>
>
> gdalinfo output for my raster file is:
>
> Driver: GTiff/GeoTIFF
> Files: /tmp/image.tiff
> Size is 800, 600
> Coordinate System is:
> GEOGCS["WGS 84",
> DATUM["WGS_1984",
> SPHEROID["WGS 84",6378137,298.257223563,
> AUTHORITY["EPSG","7030"]],
> AUTHORITY["EPSG","6326"]],
> PRIMEM["Greenwich",0],
> UNIT["degree",0.0174532925199433],
> AUTHORITY["EPSG","4326"]]
> Origin = (-123.860031127930000,38.011638641357401)
> Pixel Size = (0.033339290618897,0.026156539916992)
> Metadata:
> AREA_OR_POINT=Area
> Image Structure Metadata:
> INTERLEAVE=BAND
> Corner Coordinates:
> Upper Left (-123.8600311, 38.0116386) (123d51'36.11"W, 38d
> 0'41.90"N)
> Lower Left (-123.8600311, 53.7055626) (123d51'36.11"W,
> 53d42'20.03"N)
> Upper Right ( -97.1885986, 38.0116386) ( 97d11'18.96"W, 38d
> 0'41.90"N)
> Lower Right ( -97.1885986, 53.7055626) ( 97d11'18.96"W,
> 53d42'20.03"N)
> Center (-110.5243149, 45.8586006) (110d31'27.53"W,
> 45d51'30.96"N)
> Band 1 Block=800x2 Type=Float32, ColorInterp=Gray
>
> Regards,
>
> Chris
>
>
> On Sat, Apr 16, 2011 at 4:34 PM, Stephen Woodbridge
> <woodbri at swoodbridge.com <mailto:woodbri at swoodbridge.com>
> <mailto:woodbri at swoodbridge.com
> <mailto:woodbri at swoodbridge.com>>> wrote:
>
> On 4/16/2011 4:33 PM, Christopher Dedels wrote:
>
> Thanks for the suggestion. I have tried it and it
> appears to
> have no
> effect.
>
> Chris
>
>
> On Sat, Apr 16, 2011 at 4:26 PM, Stephen Woodbridge
> <woodbri at swoodbridge.com <mailto:woodbri at swoodbridge.com>
> <mailto:woodbri at swoodbridge.com <mailto:woodbri at swoodbridge.com>>
> <mailto:woodbri at swoodbridge.com <mailto:woodbri at swoodbridge.com>
>
> <mailto:woodbri at swoodbridge.com
> <mailto:woodbri at swoodbridge.com>>>> wrote:
>
> Try changing the layer status to default, ie:
>
> STATUS DEFAULT
>
> -Steve W
>
>
> On 4/16/2011 2:22 PM, Christopher Dedels wrote:
>
> I am having some problems adding a raster layer
> to my
> map. The
> image
> produced by mapserver is blank. My mapfile is
> as follows:
>
> MAP
> SIZE 800 600
> UNITS meters
>
>
> This is a problem, Your UNITs are meters, but your extents and
> projection are DD!
>
>
> EXTENT -123.8600311 38.0116386 -97.1885986
> 53.7055626
>
> PROJECTION
> "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"
> END
>
> LAYER
> NAME "grid"
> TYPE RASTER
> DATA "/tmp/image.tiff"
> STATUS ON
> PROJECTION
> "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"
> END
> END
> END
>
> I have also noticed that changing the DATA path to a
> file which
> does not
> exist in the filesystem (or is not a
> GDAL-supported file
> format)
> has no
> effect on the rendered output and does not
> produce an
> error message.
>
> Can somebody help me where I am going wrong?
>
> Thanks
>
>
>
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