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Thanks to Frank Warmerdam, and David Armstrong, who supplied the tools
and answers. There are two steps to displaying tiled images<br>
1. Create a shape file index of the raster tiles.<br>
2. Reference the index in the Map file.<br><br>
Step 1: <br><br>
Frank provided a great stand-alone tool to make the index shape
file<br>
<font color="#0000FF"><u>ftp//gdal.velocet.ca/pub/outgoing/gdaltindex.zip<br>
</u></font>To run it you will also need to download the GDAL binaries for
NT.<br>
<font color="#0000FF"><u>ftp//ftp.remotesensing.org/gdal/gdal-1142-ntbin.zip<br>
</u></font>To run it under UNIX would be something like<br>
gdaltindex out.shp data/*.tif<br>
<br>
To run it under DOS is a little more work, as you can not use a wildcard.
You have to get all of your image file names on to the command line. My
solution was less than elegant: First I did a dir *.tif >
MakeIndex.bat /b. This made a list of all my image files. Next I edited
the batch file; I removed the “Return” from the end of each line so that
all the tif file names were on one line, and then I added “gdaltindex.exe
ImageIndex.shp” to the beginning of the line. So I ended up with a DOS
batch file that ran gdaltindex.exe with all of the tif file
names.<br><br>
Alternately, there probably are ArcView and/or ArcInfo scripts that can
make the image tile index.<br><br>
Step 2 <br><br>
Put a reference to the igmae tile index into your Map file. Mine looks
like this:<br><br>
LAYER<br>
NAME "Aerial Photos"<br>
TYPE raster<br>
STATUS on<br>
# Image Tile Index Shape File created in Step 1, above<br>
TileIndex
ImageIndex.shp<x-tab> </x-tab><br>
# Name of Column containing the image file name, and
optionally, path<br>
TileItem
"Location"<x-tab> </x-tab><br>
END # end of layer "Aerial Photos"<br>
<br>
Thanks, Frank and Dave, for all the help.<br>
Rich<br><br>
<x-sigsep><p></x-sigsep>
Richard W. Greenwood, PLS<br>
Greenwood Mapping, Inc.<br>
Rich@GreenwoodMap.com<br>
(307) 733-0203 fax: 733-4018<br>
<a href="http://www.greenwoodmap.com/" eudora="autourl">http://www.GreenwoodMap.com</a></html>