[mapserver-users] using GDAL to display a PNG Raster.
Nelson Soto
nellyfromma at gmail.com
Fri May 16 06:20:36 PDT 2008
Hello,
I have a PNG that I would like to use as an overlay for a 2x6 set of
aerial tiles. I just want to use MINSCALE and MAXSCALE to turn one and
the other off and on.
That isn't the problem I'm having.
I can't get the PNG to display. The file itself is fine, but I can not
make a mapfile display the PNG.
I have made a new mapfile that I want to just display the PNG first
before possibly integrating it into the same mapfile as my tileindex.
I know that the PNG is supposed to be georeferenced but I don't know
how to create those files so I would like to use GDAL to output the
PNG as I hear It will simply apply the extents.
Here is what I have:
MAP
NAME 'overlay'
SIZE 800 650
STATUS ON
EXTENT 201000.000000 874000.000000 213000.000000 882000.000000
UNITS METERS
FONTSET '../fonts/fontset.list'
SYMBOLSET '../symbols/symbol.sym'
TRANSPARENT OFF
IMAGETYPE PNG
OUTPUTFORMAT
NAME png
DRIVER "GDAL/PNG"
MIMETYPE "image/png"
FORMATOPTION "TARGET=95"
IMAGEMODE PC256
END
QUERYMAP
STATUS ON
STYLE SELECTED
END
WEB
INCLUDE "/ms4w/apps/GeoMOOSE/maps_test/web_config.map"
END
LEGEND
STATUS OFF
END
LAYER
NAME "overlay"
STATUS DEFAULT
TYPE RASTER
DATA "overlay.png"
#MINSCALE 14000
END
END ## end Map
Also, the PNG is color. I would like my overlay to certainly be in color.
The mapfile and png are in the same dir.
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