Ahh, thanks! It helps to frame the question correctly. I see now that what I am trying to do is create the hex-encoded form of WKB.
On Wed, Oct 14, 2015 at 10:24 AM, Even Rouault <even.roua...@spatialys.com> wrote: > Le mercredi 14 octobre 2015 19:18:20, Roger André a écrit : > > <grin> Yes Even, exportToWkb() was something I tried, but I thought > there > > might be an easy way to get the ASCII form of the WKB, rather than the > > straight binary that I got when I wrote out to a text file. > > Ah I missed that part. > > The following should help: > > http://www.gdal.org/cpl__string_8h.html: > > char * CPLBinaryToHex (int nBytes, const GByte *pabyData) > CPL_WARN_UNUSED_RESULT > Binary to hexadecimal translation. More... > > GByte * CPLHexToBinary (const char *pszHex, int *pnBytes) > CPL_WARN_UNUSED_RESULT > > Even more compact with base64 encoding: > > char * CPLBase64Encode (int nBytes, const GByte *pabyData) > CPL_WARN_UNUSED_RESULT > > int CPLBase64DecodeInPlace (GByte *pszBase64) > > > > > Norman, thanks for the links. I'll go peruse them. > > > > On Wed, Oct 14, 2015 at 10:10 AM, Norman Vine <n...@cape.com> wrote: > > > On Oct 14, 2015, at 12:59 PM, Roger André <ran...@gmail.com> wrote: > > > > > > Hi All, > > > > > > I have a tool which currently exports geometry using the ExportToWkt() > > > function. It works great, but I'd like to try reducing the size of my > > > output files by using a format like the string representation of WKB > that > > > shp2pgsql produsces when creating SQL insert files. Is there a export > > > function available in GDAL that I could use for this? > > > > > > I'm looking at http://www.gdal.org/classOGRGeometry.html currently, > but > > > have not yet spotted what I'm looking for. > > > > > > Thanks, > > > > > > > > > see > > > http://www.gdal.org/ogr__api_8h.html#ad5c94ae76c09774dba8725c24daeefd6 > > > or > > > > http://www.gdal.org/classOGRGeometry.html#a9a3ad2f9b55285be500ca6ac5dc75d > > > 1d > > -- > Spatialys - Geospatial professional services > http://www.spatialys.com >
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