Selon Daniel Morissette <dmorisse...@mapgears.com>: > FWIW I think support for M would be a very welcome addition. An > immediate use I'd see for it would be support for time on GPS tracks in > GPX files. > > Note that if supporting the M dimension doesn't seem enough for a SoC > project, making sure that all formats that support M (or as many as > possible) are upgraded to properly implement it may very well fill the > rest of the summer.
Good point. At least the following ones for sure support M: Shapefile, ESRI Personal Geodatabase, FileGDB / OpenFileGDB, PostGIS (and PGDump and CartoDB), Spatialite, GeoPackage Likely (but not verified): GML, Oracle Maybe: MSSQL, MySQL And as pointed by Daniel, the GPX and KML / LIBKML drivers could also use the M dimension for storing track times. Probably the GPSTrackMaker one also, but not verified. So indeed quite a few drivers to get familiar with! > > My 0.02$ > > Daniel > > > On 2015-03-17 9:04 PM, Even Rouault wrote: > > Selon Edson Ticona <xcr...@gmail.com>: > > > >> Hi > >> > >> I was looking for the ideas list on the site and found this one > >> interesting: "Adding support for "M" dimension in OGR Geometries" but > >> it's from 2014. Is it still relevant for the project? I searched on > >> the code and it isn't implemented. > >> For example, the class OGRGeometry needs the methods isMeasured, > >> LocateAlong and LocateBetween according to the definition on the OGC > >> simple standard. I couldn't find an ISO standard talking about M > >> coordinates. Which one do you refer on the page? > >> What do you think? Some feedback would be helpful. > > > > Edson, > > > > Yes it is still relevant. Perhaps SQL/MM Part 3 mentions it ? I didn't > check. > > You'll find the link to a draft doc on > > http://trac.osgeo.org/gdal/wiki/rfc49_curve_geometries > > What has been done in PostGIS might also be interested looking into. > > M only might be a bit light for a whole SOC, so adding support for > > POLYHEDRALSURFACE and TIN might also been interesting for completness (and > full > > PostGIS interoperability). > > > > Even > > > > > -- > Daniel Morissette > T: +1 418-696-5056 #201 > http://www.mapgears.com/ > Provider of Professional MapServer Support since 2000 > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev > -- Spatialys - Geospatial professional services http://www.spatialys.com _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
