Hi Knut-Frode, Il giorno Thu, 07 Apr 2011 12:03:24 +0200 Knut-Frode Dagestad <knutfrodesop...@hotmail.com> ha scritto:
> Antonio, > > On 06.04.2011 13:09, Antonio Valentino wrote: > > I'm not sure to understand. GDAL reads data from the product. If the > > product is not geo-referenced you will get data that are not > > geo-referenced. > > > > In this case you could use GDAL tools to interpolate data in a > > geographic grid but you need to know geographic info and/or > > parameters that are stored in the product itself. > > > > In the case of ENVISAT product (but for stripline ones #3160) you > > should be able to perform the re-projection e.g. using gdalwarp with > > the -tps option (I never tested it personally). > > It could be that I do not properly understand the term > "georeferenced". For the example of Envisat ASAR, the image data is > read perfectly, and also GCP's are read relating rows and columns to > latitude and longitude (though not correct, #3709). > When the datum is given (WGS84) should this product then not be > georeferenced? Oh sorry, my english is very poor. I used the term "georefernced" to intend products that are sampled on a regular geographic grid, oriented to north, etc. (e.g ENVISAT IMG products). Products like ENVISAT IMS or IMP have an associated reference ellipsoid but are not sampled on a regular geographic grid. > Nevertheless, Envisat is marked as not georeferenced in the table of > supported raster formats, and reprojecting with gdalwarp does also > not work for me. > > >> Finally, we would also ideally like to have immediate (pre release) > >> support for upcoming satellites such as the ESA Sentinel > >> satellites. > > > > This is very interesting. > > Can you point me to product specifications of Sentinel data? > > I have not looked at this yet, but is seems like the format for > Sentinel-1 will be Geotiff and XML, so it should then not be a > problem at all: > http://www.terrafirma.eu.com/Documents/Workshops/WS%206/ESA%20SAR%20Products%20for%20Interferometry.pdf > Thank you very much > > Best regards from Knut-Frode > > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev -- Antonio Valentino _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
