[Mapserver-users] Spatial extent for shape file?

[woodbri at swoodbridge.com]

This is easy now that you have the tileindex! Use shpdump or shpinfo 
and the extents of your data will be the extents of your tileindex.

-Steve W.

On 11 Jun 2003 at 13:48, Twan Kogels wrote:

> Hello,
> 
> It's been a while since i used mapserver. Yesterday i received a cdrom
> with raster maps, today i'm getting it to work. The cdrom contains a
> lot of tiff files which represent a tiled map. The tiff files are of
> format "GTiff/GeoTIFF". I used the "gdaltindex" program to make a shp
> index of all the tiles.
> 
> The cdrom also contains a esri .tfw (or mapserver .wld) and a .tab
> file for every single tiff file.
> 
> I'm now making my .map file which mapserver should use, but i'm stuck
> at defining the EXTENT line. I've looked for documentation about the
> tiff files on cdrom but found none. The info in the .tab file is
> interesting: ============================= !table !version 300
> !charset WindowsLatin1
> 
> Definition Table
> File "1000047.TIF"
> Type "RASTER"
> (0,376000) (0,5333) Label "Pt 1",
> (0,384000) (0,0) Label "Pt 2",
> (12000,384000) (8000,0) Label "Pt 3",
> (12000,376000) (8000,5333) Label "Pt 4"
> CoordSys Earth Projection 20, 109, "m", 5.387638889, 52.156160556,
> 0.9999079, 155000, 463000 Units "m" =============================
> 
> The output of the program "gdalinfo" analyzing a tiff file on cdrom is
> also interesting: ============================= gdalinfo 4000007.TIF
> Driver: GTiff/GeoTIFF Size is 1778, 1185 Coordinate System is `'
> Origin = (-20.250000,384020.250000) Pixel Size =
> (40.500000,-40.500000) Metadata:
>    TIFFTAG_SOFTWARE=Handmade Software, Inc. Image Alchemy v1.7.7
> Corner Coordinates:
> Upper Left  (     -20.250,  384020.250)
> Lower Left  (     -20.250,  336027.750)
> Upper Right (   71988.750,  384020.250)
> Lower Right (   71988.750,  336027.750)
> Center      (   35984.250,  360024.000)
> Band 1 Block=1778x8 Type=Byte, ColorInterp=Red
> Band 2 Block=1778x8 Type=Byte, ColorInterp=Green
> Band 3 Block=1778x8 Type=Byte, ColorInterp=Blue
> Band 4 Block=1778x8 Type=Byte, ColorInterp=Alpha
> =============================
> 
> I know the the EXTENT line in the .map file means the lower left
> coordinates en the upper right coordinates, but i don't know how to
> get this information in my case.
> 
> The output of gdaltinfo shows several "Corner Coordinates", but i have
> used gdaltindex to make a .shp file and now i'm using that shape file
> as index in my .map file: ============================== LAYER
>    NAME "test"
>    STATUS ON
>    TILEINDEX "test.shp"
>    TILEITEM "Location"
>    TYPE RASTER
> END
> ===============================
> so, this renders the gdaltinfo useless, cause the Corner Coordinates
> aren't correct anymore.
> 
> The line:
> ===============================
> CoordSys Earth Projection 20, 109, "m", 5.387638889, 52.156160556,
> 0.9999079, 155000, 463000 =============================== in the .tab
> file seems interesting, but i could not find any information about the
> meaning of those numbers. Could i get the values for EXTENT from this
> line? Or is there maybe a program which calculates the EXTENT or
> Corner Coordinates for a given .shp file?
> 
> Best regards,
> Twan Kogels
> 
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