[Gdal-dev] does gdaltindex support MapInfo GIF+GIF format?

[Zhonghai Wang]

Hi All,

yesterday I've solve this problem with the first solution. I summarize below
how I've done it.

first of all, the second soluttion is not possible, because if you use the
gdal_merge.py command, the projection information i.e. wld files are
required at the same time.

I've programmed with VB6:
1. read the *.txt file into the TextStream object
2. analyse the TextStream, get the useful info for the worldfile
3. write the data with the roration information to a new text file with the
.wld extension
4. convert all the GIFs to TIFs --- this step is optional
5. tile the images

that's it.

best regards

zhonghai


On 5/23/06, Zhonghai Wang <zhonghaiw at gmail.com> wrote:
>
>  Hi Frank,
>
> I am trying now the following two options:
>
> 1. use script to create worldfiles for the GIFs,
> 2. merge the GIFs using gdal_merge.py, and create a single *tfw for the
> output tif file. After that a single gdaltindex command with "TILED=YES"
> should be good enough for my application.
>
> thanks
>
> zhonghai
>
>  On 5/23/06, Frank Warmerdam <warmerdam at pobox.com> wrote:
> >
> > Zhonghai Wang wrote:
> > > Hi guys,
> > >
> > > I've posted this question in the MapServer list, but I did not get any
> >
> > > reasonable solution, I'd like to post it here again, hope somebody
> > > can give me some clues.
> > >
> > > I have a subfolder of GIF raster image, and each GIF file has a
> > > corresponding TAB file, which specifies the coordinate information for
> >
> > > the GIF image, the content of the TAB is something like this:
> > >
> > > ***
> > > !table
> > > !version 300
> > > !charset WindowsLatin1
> > >
> > > Definition Table
> > >   File "m_1_1_1000.gif"
> > >   Type "RASTER"
> > >   (5.290517,48.2308475) (1392,987) Label "Pt 1",
> > >   (5.25001439194036,48.25) (0,0) Label "Pt 2",
> > >   (5.25001439194036 ,48.211695) (0,1974) Label "Pt 3",
> > >   (5.33101960805964,48.25) (2784,0) Label "Pt 4",
> > >   (5.33101960805964,48.211695) (2784,1974) Label "Pt 5"
> > >   CoordSys Earth Projection 1, 104
> > >   Units "degree"
> > > ***
> > >
> > > but if I perform the gdaltindex command to create a tile shapefile for
> > > the images, an error occurs:
> > >
> > >  >>no georeferencing info available for the images file, performance
> > > will be skipped.
> > >
> > > and I also get some info from the "Raster Data Access" document, "The
> > > only way to georeference GIF files is with a world file. ", is it
> > really
> > > so?if it's true, there will be a huge project for me to change all the
> >
> > > TAB files.
> > >
> > > hope that someone can help.
> > >
> > > thanks so much for any info.
> >
> > Zhonghai,
> >
> > As I think was explained on the mapserver list, GDAL does not currently
> > support mapinfo tab files as a source of georeferencing for raster
> > files.
> > So you will need to manually or by script create world files for from
> > the
> > .tab files.
> >
> > Good luck,
> >
> > --
> >
> > ---------------------------------------+--------------------------------------
> > I set the clouds in motion - turn up   | Frank Warmerdam,
> > warmerdam at pobox.com
> > light and sound - activate the windows | http://pobox.com/~warmerdam
> > and watch the world go round - Rush    | President OSGF,
> > http://osgeo.org
> >
> >
>
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