[MAPSERVER-USERS] Tiff files with different projections in the samelayer

[Rahkonen Jukka]

I fear that tileindex can contain only images sharing the same projection. But perhaps, if you do not have very many different projections, you could make own tileindex for each projection and put them under same GROUP.

Kind of a trick that might work is to reproject images to some common projection, not physically but by creating a virtual raster (.vrt).  Something like this:
C:\data>gdalwarp -of vrt -s_srs epsg:2392 -t_srs epsg:2393 saarijarvi.tif vrt_test.vrt
Followed by:
gdaltindex vrt_tindex.shp *.vrt

I have never tried that but somehow the idea fascinates me. I hope it works.

-Jukka Rahkonen.


-----Alkuperäinen viesti-----
Lähettäjä: mapserver-users-bounces at lists.osgeo.org puolesta: Pål Kristensen
Lähetetty: pe 14.3.2008 17:20
Vastaanottaja: mapserver-users at lists.osgeo.org
Aihe: [MAPSERVER-USERS] Tiff files with different projections in the samelayer
 

Hi!

I have several GeoTiff files with different projections parameters, they are
all transverse mercator but the central meridian and the latitude of origin
differs. The projection information is written in the tiff files, hence the
files are real GeoTiffs. Is it possible to build a tileindex for these files
without re projecting them to a common projection, and access them trough
one single layer in a mapfile?

Regards
Pål Kristensen
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