[mapserver-users] Problem with rasters and world files

Thu Oct 10 08:56:24 PDT 2002

Hi James,
  you MUST specify the pixel size not number of pixels at the 1. and 4. row
of your wld file.

Stepan Kafka
Help Service Remote Sensing
tel: +420-327514118
mailto:kafka at email.cz
http://www.bnhelp.cz

  -----Puvodní zpráva-----
  Od: owner-mapserver-users at lists.gis.umn.edu
[mailto:owner-mapserver-users at lists.gis.umn.edu]za uživatele James Anderson
  Odesláno: 10. ríjna 2002 14:30
  Komu: mapserver-users at lists.gis.umn.edu
  Predmet: [mapserver-users] Problem with rasters and world files

  Hi,

  I am a Mapserver newbie.  Please Help !!

  I am trying to display a raster image of Harare.  The raster file name is
Harare.tif   It is 8bit uncompressed.  13258x14646 pixels.   I have made a
world file called Harare.wld  They are in the C:\Rasters directory
  The world file looks like this:

  13258
  0.0000000000
  0.0000000000
  -14646
  30.873957
  -17.680917

  The top left corner of the image is at 30.873957 X and -17.680917 Y
  I have made a map file Harare.map  that looks like this:

  NAME EX1
  EXTENT -18.170 -35.000 54.531 38.020
  SIZE 400 400
  SHAPEPATH "C:\Rasters"
  PROJECTION
      "proj=longlat"
      "ellps=WGS84"
      "datum=WGS84"
      "no_defs"
  END
  IMAGECOLOR 18 23 89

  LAYER
    NAME "Harare"
    DATA "Harare.tif"
    TYPE RASTER
    STATUS ON
  END

  END # end of map file

  And an html file  default.html that looks like this:

  <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
  <html>
   <head>
    <title>Harare Map</title>
   </head>
   <body bgcolor="#ffffff">
    <img border="1"
src="/cgi-bin/mapserv.exe?map=C:\Inetpub\wwwroot\map3\Harare.map&mode=map"><
/p>
   </body>
  </html>

  Now I am not sure what I am doing wrong.  The mapserver outputs a dark
blue image, same color as the imagecolor statement in the mapfile.  This
means that the mapserver is working and that my file permissions are ok.  I
am running under WinXP with IIS5.1   You can see my image at
http://www.thebeastie.net/map3/
  I think that either the extent in the mapfile is wrong or I have the world
file wrong.  I am not sure which.  The example of how to make world files is
not very clear.

  Can anyone help ?

  Thanks,

  James.

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