[mapserver-users] SUM: multiple image tiles

[Ed McNierney]

Richard -
 
The file name expansion you expect is not turned on by default in the
Microsoft C compiler.  To link with it turned on, you need to link
explicitly with the setargv.obj module, as in:
 
cl gdaltindex.c /link setargv.obj

If Frank could be persuaded to relink the NT binary (assuming that this
is the problem) then it should work as it does on UNIX.
 
    - Ed



Ed McNierney 
Chief Mapmaker 
TopoZone.com 
(978) 251-4242

-----Original Message-----
From: Richard Greenwood [mailto:Rich at GreenwoodMap.com]
Sent: Friday, April 27, 2001 11:30 AM
To: mapserver-users at lists.gis.umn.edu
Subject: [mapserver-users] SUM: multiple image tiles


Thanks to Frank Warmerdam, and David Armstrong, who supplied the tools
and answers. There are two steps to displaying tiled images
1. Create a shape file index of the raster tiles.
2. Reference the index in the Map file.

Step 1: 

Frank provided a great stand-alone tool to make the index shape file
ftp//gdal.velocet.ca/pub/outgoing/gdaltindex.zip
To run it you will also need to download the GDAL binaries for NT.
ftp//ftp.remotesensing.org/gdal/gdal-1142-ntbin.zip
To run it under UNIX would be something like
gdaltindex out.shp data/*.tif
 
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.

Alternately, there probably are ArcView and/or ArcInfo scripts that can
make the image tile index.

Step 2 

Put a reference to the igmae tile index into your Map file. Mine looks
like this:

LAYER
    NAME "Aerial Photos"
    TYPE raster
    STATUS on
   # Image Tile Index Shape File created in Step 1, above
    TileIndex ImageIndex.shp    
    # Name of Column containing the image file name, and optionally,
path
    TileItem "Location" 
END  # end of layer "Aerial Photos"
  
Thanks, Frank and Dave, for all the help.
Rich



Richard W. Greenwood, PLS
Greenwood Mapping, Inc.
Rich at GreenwoodMap.com
(307) 733-0203 fax: 733-4018
http://www.GreenwoodMap.com <http://www.greenwoodmap.com/>