[mapserver-users] Display GeoTIFF raster data

[Ed McNierney]

Stefan -

Could you send the world file contents?  Thanks.

	- Ed

-----Original Message-----
From: Stefan Stern [mailto:mail2stern at gmx.net]
Sent: Wednesday, July 31, 2002 10:12 AM
To: MAPSERVER
Subject: Re: [mapserver-users] Display GeoTIFF raster data


Hi all,

First thanks for all your sugestions!

I created 3 subset image from my dataset [unsing ENVI]:
1)  .BMP with an additional world file [.wld]
2) .TIF 8bit grey with an additional world file [.wld]
3) .PNG

Unfortunately all files didn't work out (appeared in mapserver).
So I guess the error is in my mapfile, which looks pretty equal to
the tutorial one  [in my eyes ;-)]. 

##################### myfile.map #####################
NAME URGENT
EXTENT 266341.5 191854.5  267340.5 192853.5
#grid is ordonance survey GB
SIZE 300 300
SHAPEPATH "/home/.../data"


LAYER # Raster
  NAME "casi"
  DATA "subset_1000_1000_white.tif"
  TYPE RASTER
  STATUS ON
END#layer end

END # end of map file
########################################################

I inserted each file (.tif, .png, .bmp) and none was displayed.

What do I miss out?

Thanks and Regards,
Stefan



Hankley, Chip wrote:

>Stefan...
>
>In addition to Perry's comments, you can always use some of the libgeotiff
>tools to help you manipulate your geotiff:
>
>http://www.remotesensing.org/geotiff/geotiff.html
>
>You can use the 'listgeo' program to generate an ESRI style world file, as
>well as to dump the contents of the geotiff into the standard geotiff
>metadata format. You can then, as Perry suggested, use your favorite Image
>manipulator to convert from RGB to indexed color, then go back and use the
>'geotifcp' program to convert the resulting tiff into a geotif.
>
>The results would be the same, you just wouldn't have to worry about
>maintaining a separate file. Also, if your original RGB geotiff has metadata
>information in addition to that covered by the standard ESRI style world
>file, it would be incorporated into your final Index-color geotiff as well.
>
>Cheers!
>
>Chip
>
>-----Original Message-----
>From: Pericles S. Nacionales [mailto:pnaciona at gis.umn.edu]
>Sent: Monday, July 29, 2002 2:31 PM
>To: 'Stefan Stern'
>Cc: mapserver-users at lists.gis.umn.edu
>Subject: RE: [mapserver-users] Display GeoTIFF raster data
>
>
>Are you using an RGB image?  If you are, you'll need to convert it into
>a bitmap (indexed color) image.  MapServer doesn't yet support RGB
>images.  Hopefully, your software can export GeoTIFFs.  If not, you'll
>have to create a world file (with extension .wld).  See Tom Kralidis'
>info about world files: http://www.kralidis.ca/gis/worldfile.htm
>Remember to use the extension ".wld" and not ".tfw".
>
>Most image manipulation software (i.e. Gimp or Photoshop) can convert
>RGB GeoTIFFs to bitmap but can't keep the GeoTIFF header.  If you use
>one of these software, you'll need to create a world file to add
>georeferencing to your image.  If you have an image processing software
>(i.e.: Imagine, Geomatica) you can export your bitmap image in GeoTIFF
>format and you won't need a world file.
>
>Of course you should also check your projections and extents...  If
>you're trying to overlay your image with the tutorial data, it won't
>happen.  If you're trying to overlay a Transverse Mercator (or UTM)
>projected image with unprojected (with lat/lon coordinates) vector data,
>it won't happen...  unless you already know how to reproject your data
>on the fly (that's section 4 on the tutorial).
>
>I hope this helps.
>
>-Perry
>
>-----Original Message-----
>From: owner-mapserver-users at lists.gis.umn.edu
>[mailto:owner-mapserver-users at lists.gis.umn.edu] On Behalf Of Stefan
>Stern
>Sent: Monday, July 29, 2002 7:40 AM
>To: MAPSERVER
>Subject: [mapserver-users] Display GeoTIFF raster data
>
>Hi NG,
>
>after spending some days on trying to display a GeoTiff image in 
>mapserver I ask for your advice.
>Compared to the example used in the tutorial ( 
>http://terrasip.gis.umn.edu/projects/tutorial35/s2/s2ex3.html ) image 
>dataset is more complex.
>It includes the following values for each pixel:
>
>################
>Scrn: R:146 G:103 B:50
>Projection: GEOTIFF (Transverse Mercator)
>Map: 267457.50E,197788.50N Meters
>LL : 3.548576N, 1.228218W
>Data: R:136 G:102 B:68
>###############
>
>How do I display this image in mapserver?
>Do I need to rewrite header information of the source image or is it 
>just a question of "How to display it in mapserver"?
>Is there some additional documentation / reference available?
>
>Thanks for suggestions.
>
>Regards,
>Stefan
>
>
>
>
>
>