Le 29/03/2021 à 17:46, Joaquim Manuel Freire Luís a écrit : Thanks,
Maybe add that info to the docs? By now it only says We would definitely appreciate your contribution ! OK, I owe you at least that. It's just a heavy first step (fork+PR) for this small thing but I'll do it. "OGR_G_GetX() Fetch the x coordinate of a point from a geometry." From: Even Rouault <even.roua...@spatialys.com><mailto:even.roua...@spatialys.com> Sent: Monday, March 29, 2021 4:43 PM To: Joaquim Manuel Freire Luís <jl...@ualg.pt><mailto:jl...@ualg.pt>; gdal-dev@lists.osgeo.org<mailto:gdal-dev@lists.osgeo.org> Subject: Re: [gdal-dev] Can't access to points in a buffer returned geometry with OGR_G_GetX OGR_G_GetX() can only work on a Point or a LineString/LinearRing for a polygon, you need to extract the ring first with OGR_G_GetGeometryRef() / OGR_G_GetGeometryCount() Even Le 29/03/2021 à 17:26, Joaquim Manuel Freire Luís a écrit : OK, one more from the Julia wrappers. Playing with buffers now, and it works but I want to get the points and that fails julia> wkt = "POINT (1198054.34 648493.09)"; julia> dbf = Gdal.buffer(Gdal.fromWKT(wkt), 500) Geometry: POLYGON ((1198554.34 648493.09,1198553.65476738 64 ... .09)) julia> toWKT(dbf)[1:90] "POLYGON ((1198554.34 648493.09,1198553.65476738 648466.922021879,1198551.60094768 648440.8" The 'toWKT()' function calls OGR_G_ExportToWkt() But now if I try to extract the points with OGR_G_GetX() it errors julia> Gdal.OGR_G_GetX(dbf.ptr, 0) ERROR 6: Incompatible geometry for operation # ç============= ???? 0.0 julia> Gdal.OGR_G_GetPointCount(dbf.ptr) # ç============= Why so? 0 Although the toWKT() works, tat's an ascii representation but I want I want to access them in binary (not in WKB) to send to GMT. Joaquim _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org<mailto:gdal-dev@lists.osgeo.org> https://lists.osgeo.org/mailman/listinfo/gdal-dev -- http://www.spatialys.com My software is free, but my time generally not. -- http://www.spatialys.com My software is free, but my time generally not.
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