Re: [gdal-dev] convert geotiff to jpg
weixj2003ld wrote: Hi,how to convert a geotiff file to a jpg file? Wei, Sorry, I neglected this part. gdal_translate -of JPEG in.tif out.jpg Best regards, -- ---+-- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush| Geospatial Programmer for Rent ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] convert geotiff to jpg
weixj2003ld wrote: Hi,how to convert a geotiff file to a jpg file? BTW,I read two .tif files.and to get the count of raster through getRastercount().one is 3 and the other is 6,what is means of 3 and 6? Thk u in advance. Wei, The eat-your-own-tail answer is that 3 and 6 are the number of bands . It is likely that the 3 band image has red, green and blue bands. The six band image is presumably some sort of multispectral sensor like Landsat, and the bands do not have obvious color gun assignments. However, the final answer is that knowing the number of bands isn't enough to tell us what they are. Best regards, -- ---+-- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush| Geospatial Programmer for Rent ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] software can display geotiff file in 3D viewer.
Hi Could you tell me some open source softwares(base on windows) that can display geotiff files in 3D mode not in 2D mode? wei___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] convert geotiff to jpg
Hi,how to convert a geotiff file to a jpg file? BTW,I read two .tif files.and to get the count of raster through getRastercount().one is 3 and the other is 6,what is means of 3 and 6? Thk u in advance.___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] Unable to set GDAL_merge NODATA or calculate statistics
Hey, I have two questions. 1. I have 32bit float rasters that I'm trying to merge. GDAL_merge does not seem to set the output nodata to the first input raster nodata value. There is a -n option, but the nodata value for a 32bit float is -3.4028235e+038. Entering in this value with -n does not set the nodata value in the output tif. Is there another way to express this value that gdal_merge understands? 2. Is there a way for gdal_merge to automatically calculate the statistics on the output tif? I have had issues with this before when writing out tif rasters with GDAL (c++). Thanks, --Keith Olsen ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Setting ENVI .hdr band names
Benjamin Welton wrote: Hey all, Im wondering if its possible to set the band names that appear in the ENVI header file instead of having the default band 1, band 2, (which looks kinda messy) Ben, Reviewing the current envidataset.cpp code, it seems that either band_names and wavelength fields are used for the band descriptions if they are available. Are you using GDAL 1.7+? If so, perhaps you could file a ticket on the issue and attach your envi header file. Best regards, -- ---+-- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush| Geospatial Programmer for Rent ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
RE: [gdal-dev] Memory corruption in PNG driver with Microsoft DebugDLLs?
Thanks, Tamas. Your blog posting is helpful in explaining the potential problems and the care that must be taken. I already paid careful attention to the memory allocation/deallocation DLL boundary concerns, but somehow I was clueless on the issues related to compiling against mixtures of Microsoft's debug and non-debug runtime DLLs. The recent ticket 3346 woke me up to this issue, and your post helps explain it further. Thanks, Jonathan From: Tamas Szekeres [mailto:szeker...@gmail.com] Sent: Thursday, April 01, 2010 2:28 AM To: Shaw, Jonathan-P29740 Cc: gdal-dev@lists.osgeo.org Subject: Re: [gdal-dev] Memory corruption in PNG driver with Microsoft DebugDLLs? 2010/4/1 Shaw, Jonathan-P29740 Upon further browsing of the open tickets, I'm wondering if I'm experiencing the crashes, heap corruption, etc. described by http://trac.osgeo.org/gdal/ticket/3346. Jonathan, You probably use GDAL along with one or more dependencies loaded dynamically (like proj, libpng, libjpeg etc.) which may have been compiled against different CRT dependencies. This may happen either by using different CRT settings or different compiler versions when compiling the various libraries. Having different CRT settings for the various libraries is not necessarily a problems when the authors of the libraries follow careful design considerations and coding practice (like making memory allocations/deallocations within the dll boundaries etc.), but it's rarely the case with the libraries we use. Using inhomogeneous CRT dependecies in dependent libraries is unsupported by Microsoft either, and I've also submitted a blogpost related to this topic here: http://szekerest.blogspot.com/2010/02/redistribution-of-shared-c-runtime .html To avoid this situation you might want to recompile all the dependencies with the same compiler and CRT setting which could be a nightmare in many cases. You could alternatively use the pre-compiled binary packages / SDKs from this location http://vbkto.dyndns.org/sdk/ which are guaranteed to compiled satisfying with the requirements above (by using the /MD settings for all, and the same compiler used). Best regards, Tamas ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Memory corruption in PNG driver with Microsoft DebugDLLs?
2010/4/1 Shaw, Jonathan-P29740 > Upon further browsing of the open tickets, I'm wondering if I'm > experiencing the crashes, heap corruption, etc. described by > http://trac.osgeo.org/gdal/ticket/3346. > > Jonathan, You probably use GDAL along with one or more dependencies loaded dynamically (like proj, libpng, libjpeg etc.) which may have been compiled against different CRT dependencies. This may happen either by using different CRT settings or different compiler versions when compiling the various libraries. Having different CRT settings for the various libraries is not necessarily a problems when the authors of the libraries follow careful design considerations and coding practice (like making memory allocations/deallocations within the dll boundaries etc.), but it's rarely the case with the libraries we use. Using inhomogeneous CRT dependecies in dependent libraries is unsupported by Microsoft either, and I've also submitted a blogpost related to this topic here: http://szekerest.blogspot.com/2010/02/redistribution-of-shared-c-runtime.html To avoid this situation you might want to recompile all the dependencies with the same compiler and CRT setting which could be a nightmare in many cases. You could alternatively use the pre-compiled binary packages / SDKs from this location http://vbkto.dyndns.org/sdk/ which are guaranteed to compiled satisfying with the requirements above (by using the /MD settings for all, and the same compiler used). Best regards, Tamas ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] get the x and y coordinate of geotiff
1. How could I get the x and y of world coordinate ,or the longitude and the latitude of it by GDAL? 2. How could get the height of it with GDAL? Thk u in advance.___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
