[Gdal-dev] need tools for TIF image reprojection

[Petteri Packalen]

Hi,

http://iweb.gdal.org/dl/fwtools/

and then download a6 version according your OS. I used Windows version.

Best regards,
Petteri

On Fri, 14 Jul 2006, Zhonghai Wang wrote:

> Hi Petteri,
>
> I am using the latest version FWTools1.0.5, which version do you mean?
> FWTools a6? never heard.
>
> if possible, can you give me a link for the version you mentioned?
>
> thanks a lot
>
> zhonghai
>
> On 7/14/06, Petteri Packalen <packalen at cs.joensuu.fi> wrote:
>> 
>> Hi,
>> 
>> This just a guess: what version of GDAL are you using? I had similar kind
>> of problem about one month ago before I left to summer holiday. I
>> downloaded the newest FWTools version and when I tried to transform some
>> images from Finnish kkj to EUREF FIN coordinate system datum shift was not
>> applied. EUREF FIN is basically ETRS89 / UTM 35N. When I revert back to
>> FTTools alpha 6 everything worked propely. I don't remember what was
>> actual gdal versions in these FWTools releases. Please try FWTools a6 if
>> possible.
>> 
>> I didn't remember to fill a bug report. I will look at it later when I
>> come back to office.
>> 
>> Best regards,
>> Petteri
>> 
>> On Fri, 14 Jul 2006, Zhonghai Wang wrote:
>> 
>> > Hi Andrew,
>> >
>> > you are right, in the most cases the GDAL utilities work well, and I've
>> also
>> > use the GDAL utilities for a long time, especially the FWTools made by
>> > Frank, we should all thank Frank for such a wonderful GIS toolkit.
>> >
>> > I've check again and again with the GDALWARP, but things are not going
>> in
>> > the right way. I am trying to translate the TIF images from the
>> coordinate
>> > system CH1903 (Swiss National System) to ETRS89 / UTM ZONE 32N, and
>> there
>> > are always  some displacement with the base maps, I am sure that the
>> base
>> > map and the original coordinate info for the TIF is correct. and here is
>> an
>> > example:
>> >
>> > (the transforming process is : CH1903 -> WGS84 -> ETRS89 / UTM ZONE 32N)
>> >
>> > the TIF image coordinate Info (*.tif): (Swiss National System)
>> > 0.500000
>> > 0.000000
>> > 0.000000
>> > -0.500000
>> > 598125.250000
>> > 199999.750000
>> >
>> > If I transform the coordinate to WGS84 with GDAL, the value is:
>> >
>> > 0.0000059839
>> > 0.0000000000
>> > 0.0000000000
>> > -0.0000059839
>> > 7.4149523128
>> > 46.9529994915
>> >
>> > but the lon/lat of the upper left corner should be:
>> >
>> > 7.41401039348263
>> > 46.9510762167473
>> >
>> > I would say that this is already big difference, because If I use this
>> > lon/lat to get the UTM coordinate, this small difference will be
>> propagated,
>> > and will cause a displacement about hundreds meters.
>> >
>> > I am trying to find the source code, which does this coordinate
>> > transformation, so that I can check if the transformation parameters are
>> > correct, but unfortunately I can not find the source for this.
>> >
>> >
>> > If someone has done something similar, please point me out how to fix
>> this
>> > problem, especially the GIS people in Switzerland. I would really
>> appreciate
>> > it.
>> >
>> > zhonghai
>> >
>> > On 7/14/06, Andrew Williams <awilliams at rapidmap.com.au> wrote:
>> >>
>> >> zhonghai,
>> >> I've litterally translated hundereds of TIF's from all over the world
>> from
>> >> multiple projections to multiple projections. I have also had
>> "failures".
>> >> However, in every case, it was either my fault in specifying the -s_srs
>> or
>> >> -t_srs. In some cases the fault lay in the original image. The TIFF
>> itself
>> >> was supplied with incorrect georefernceing information and so it was
>> never
>> >> going to work.
>> >>
>> >> Have you got a dump from GDALINFO that we can see and the GDALwarp
>> command
>> >> line you've used?
>> >>
>> >> regards
>> >> Andrew
>> >>
>> >>        -----Original Message-----
>> >>        From: Zhonghai Wang [mailto:zhonghaiw at gmail.com]
>> >>        Sent: Fri 7/14/2006 12:14 AM
>> >>        To: gdal-dev at lists.maptools.org
>> >>        Cc:
>> >>        Subject: [Gdal-dev] need tools for TIF image reprojection
>> >>
>> >>
>> >>        Hi guys,
>> >>
>> >>        I need a tool to reproject my TIF images, either free or
>> non-free
>> >> software.
>> >>        I've tried with the GDAL utilities, sure I can do the
>> reprojection,
>> >> but the coordinates seems not correct, there are serveral hundert
>> meters
>> >> displacement according to the my base maps.
>> >>
>> >>        thanks for your info.
>> >>
>> >>        zhonghai
>> >>
>> >>
>> >>
>> >>
>> >
>> 
>