Re: [gdal-dev] Idea: GeoTIFF box in JPEG to add georeferencing

2014-05-12 Thread Rahkonen Jukka (Tike)
Hi, This is just a small detail and I may be wrong, but I fear that axisLabels element does not universally remove the need to go to the database because there are systems which use "X" and "Y" as axis names, but the meaning of X and Y can be different. For example for EPSG:3857 X means Easting

Re: [gdal-dev] Idea: GeoTIFF box in JPEG to add georeferencing

2014-05-12 Thread Frank Warmerdam
Even, I have no objection to preparing such a GeoTIFF-in-JPEG/PNG mechanism, but to be honest I find it hard to get excited about GeoTIFF as a broader way of describing coordinate system information because of the various quirks with GeoTIFF and the binary opaqueness of GeoTIFF. However, there is

Re: [gdal-dev] Idea: GeoTIFF box in JPEG to add georeferencing

2014-05-12 Thread Peter Baumann
PS: not sure all on this list are aware of this overview page: http://external.opengeospatial.org/twiki_public/CoveragesDWG/CoveragesBigPicture -Peter On 05/12/2014 11:38 PM, Peter Baumann wrote: Hi all, just saw this, thought I'd chime in being the editor of GMLCOV :) Any questions, I'll gla

Re: [gdal-dev] Idea: GeoTIFF box in JPEG to add georeferencing

2014-05-12 Thread Peter Baumann
Hi all, just saw this, thought I'd chime in being the editor of GMLCOV :) Any questions, I'll gladly try to answer, I'm just on the road currently, so expect a delay of a day or so. Trying to respond to what has been raised below: On 05/12/2014 11:18 PM, Even Rouault wrote: Le lundi 12 mai 2

Re: [gdal-dev] Idea: GeoTIFF box in JPEG to add georeferencing

2014-05-12 Thread Even Rouault
Le lundi 12 mai 2014 23:05:21, Jukka Rahkonen a écrit : > Even Rouault mines-paris.org> writes: > > ... > > > > In light of this, it may be better to use an xml or textual > > > representation and embed it inside an XMP block, which is supported > > > for many formats[1]. Also it would allow for

Re: [gdal-dev] Idea: GeoTIFF box in JPEG to add georeferencing

2014-05-12 Thread Jukka Rahkonen
Even Rouault mines-paris.org> writes: ... > > In light of this, it may be better to use an xml or textual representation > > and embed it inside an XMP block, which is supported for many formats[1]. > > Also it would allow for easier human-reading. > > Yes, that's one possibility. Which comes b

Re: [gdal-dev] Idea: GeoTIFF box in JPEG to add georeferencing

2014-05-12 Thread Even Rouault
Le lundi 12 mai 2014 21:15:35, Etienne Tourigny a écrit : > Right, I didn't think of the need to create new EXIF tags. > > I think it is a good idea to use existing GTIFF tags to encode this > information. > > On the other hand, the method used in jpeg files should ideally be the same > used in o

Re: [gdal-dev] Idea: GeoTIFF box in JPEG to add georeferencing

2014-05-12 Thread Etienne Tourigny
Right, I didn't think of the need to create new EXIF tags. I think it is a good idea to use existing GTIFF tags to encode this information. On the other hand, the method used in jpeg files should ideally be the same used in other formats (e.g. png, gif) for which it is possible to add extra metad

[gdal-dev] Convert in-memory raster

2014-05-12 Thread Baker, Anthony W
I am interested in registering two images together. In order to do that I would like to align the coordinate frames, the pixel sizes, and the rotation of the two frames. Is there an easy "in-memory" method for doing this? Thank you, Anthony ___ gdal