[mapserver-users] Mapserver and raster layers
Christopher Dedels
cdedels at gmail.com
Sun Apr 17 09:09:43 EDT 2011
I'll look into the N-S coordinates. I am using gdal_grid to create a grid
from a point layer and then using gdal_contour to create a line layer from
the grid. The input point layer and output line layer seem to have the
right N-S coordinates and display on my map just fine.
Thanks,
Chris
On Sun, Apr 17, 2011 at 12:11 AM, Stephen Woodbridge <
woodbri at swoodbridge.com> wrote:
> 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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