Thank you Eric, I had to chose FME to save the ECW. My third party software supports other formats, but TIFF files are huge, so it is not a viable solution.
2014-03-04 17:07 GMT+01:00 Eric Goddard <egoddard1...@gmail.com>: > Hi Asher, > > Sorry, I didn't read the full GDAL page regarding ECW support > (http://www.gdal.org/frmt_ecw.html). ECW is a proprietary format owned > by intergraph. GDAL allows reading and writing of ECW files, but in > order to write ECW files you have to have a licensing key from > Intergraph. On Linux, when configuring the the ECW plugin it asks for > the key, and if the user doesn't have one it is configuring in > read-only mode. I'm assuming you used the OSGeo4Win installer, which I > think configures the ECW support as read only by default. If you do > have a key, I'm not sure how you would go about setting up GDAL ECW > support to recognize it. > > From the gdal ECW page: > The ECW 4.x SDK from ERDAS is only free for image decompression. To > compress images it is necessary to build with the read/write SDK and > to provide an OEM licensing key at runtime which may be purchased from > ERDAS. > > > Does the third party software you have to use not support any other > formats? > > On Tue, Mar 4, 2014 at 3:41 AM, Asher Kamiraze <asher.kamir...@gmail.com> > wrote: > > Eric, > > > > I just tried to create a VRT from all ecw images in a folder. > Unfortunately, > > it does not work, the command line seems to be rejected when there are > too > > many input files. The problem also appear if directly using the > gdalbuildvrt > > from the command line. The only solution I found was to build an > > input_file_list with the following command: > > > > cd <to_my_ecw_folder> > > dir /b *.ecw > listin_ecw.txt > > gdalbuildvrt -input_file_list listin_ecw.txt all_ecw.vrt > > > > Then, if I try to save the cropping result as an ECW file, I got the > > following error: > > > > Output driver `ECW' not recognised or does not support > > direct output file creation. The following format drivers are configured > > and support direct output: > > GeoRaster: Oracle Spatial GeoRaster > > VRT: Virtual Raster > > GTiff: GeoTIFF > > NITF: National Imagery Transmission Format > > HFA: Erdas Imagine Images (.img) > > ELAS: ELAS > > MEM: In Memory Raster > > BMP: MS Windows Device Independent Bitmap > > PCIDSK: PCIDSK Database File > > ILWIS: ILWIS Raster Map > > SGI: SGI Image File Format 1.0 > > Leveller: Leveller heightfield > > Terragen: Terragen heightfield > > netCDF: Network Common Data Format > > HDF4Image: HDF4 Dataset > > ISIS2: USGS Astrogeology ISIS cube (Version 2) > > ERS: ERMapper .ers Labelled > > RMF: Raster Matrix Format > > RST: Idrisi Raster A.1 > > INGR: Intergraph Raster > > GSBG: Golden Software Binary Grid (.grd) > > GS7BG: Golden Software 7 Binary Grid (.grd) > > PNM: Portable Pixmap Format (netpbm) > > ENVI: ENVI .hdr Labelled > > EHdr: ESRI .hdr Labelled > > PAux: PCI .aux Labelled > > MFF: Vexcel MFF Raster > > MFF2: Vexcel MFF2 (HKV) Raster > > BT: VTP .bt (Binary Terrain) 1.3 Format > > LAN: Erdas .LAN/.GIS > > IDA: Image Data and Analysis > > GTX: NOAA Vertical Datum .GTX > > NTv2: NTv2 Datum Grid Shift > > CTable2: CTable2 Datum Grid Shift > > ADRG: ARC Digitized Raster Graphics > > SAGA: SAGA GIS Binary Grid (.sdat) > > > > The generated command line by QGIs is: > > > > gdalwarp -q -cutline "F:\\MY_SHP_PATH\\Commune_Aix-en-Provence.shp" > > -crop_to_cutline -of ECW F:\MY_VRT_PATH\Toutes_dalles_13.vrt > > "F:/MY_OUTPUT_PATH/crop.ecw" > > > > It does not seem to be a "\" "/" issue, since if I choose a .vrt output > it > > works fine. > > > > Any idea on how to solve the problem? > > > > I am running QGIS 2.2.0 on 64 bits windows. > > > > Regards > > > > > > > > 2014-03-04 1:51 GMT+01:00 Eric Goddard <egoddard1...@gmail.com>: > > > >> Yes, you should be able to choose ECW from the files of type drop down > in > >> the output file selection dialog and select ECW. > >> > >> Eric > >> > >> > >> On Mon, Mar 3, 2014 at 4:48 PM, Asher Kamiraze < > asher.kamir...@gmail.com> > >> wrote: > >>> > >>> Thanks Eric, sounds really good. Is there a way to save the resulting > >>> file (clipped) as an ECW file? I need to process it later with a 3rd > party > >>> software. > >>> > >>> Regards > >>> > >>> > >>> 2014-03-03 23:26 GMT+01:00 Eric Goddard <egoddard1...@gmail.com>: > >>> > >>>> Hi asher, if you go to raster -> miscellaneous, there is a menu entry > >>>> called build virtual raster catalog. You can use that to virtually > mosaic > >>>> all of your ECW files. This tool creates a new file you can load in > as a > >>>> raster that references all of the individual ECW files to display them > >>>> seamlessly in qgis without having to spend the time to actually > mosaic all > >>>> of them together. Load the resulting vrt file into qgis using add > raster and > >>>> clip the vrt to your polygon layer using raster -> extraction -> > clipper. > >>>> > >>>> Eric > >>>> > >>>> On Mar 3, 2014 3:53 PM, "Asher Kamiraze" <asher.kamir...@gmail.com> > >>>> wrote: > >>>>> > >>>>> Hi all, > >>>>> > >>>>> I have a set of more than 200 ecw rasters that I can easily load in > >>>>> QGIS. I also have a vector polygon layer which bounds an area > covering a > >>>>> part of the area covered by the whole set of rasters. What I would > like to > >>>>> do is to extract only, the raster which are intersected by the vector > >>>>> boundary. As a final goal, I would like to only mosaic thoses > images. I did > >>>>> not found a way to easily do this in QGIS. Any idea on how to > achieve this? > >>>>> > >>>>> As a workaround, I have opened only the raster intersecting the > vector, > >>>>> and would like to mosaic them. However, it does not seem to be a > function in > >>>>> QGIS ready to mosaic all opened (or selected) rasters. Any idea on > how to > >>>>> automate the process? > >>>>> > >>>>> Hope you could help > >>>>> > >>>>> Regards > >>>>> > >>>>> _______________________________________________ > >>>>> Qgis-user mailing list > >>>>> Qgis-user@lists.osgeo.org > >>>>> http://lists.osgeo.org/mailman/listinfo/qgis-user > >>> > >>> > >> > > >
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