Nik, This is a good idea. The doc you specified needs a correction. The version string and style field lines are supposed to be commented out with a #.
The OGRStyleTable class has methods to save and load style tables. They assume neither empty lines nor comments. There is one method to Print that saves the styletable into a file in the .ofs format. We can implement a method that loads a styletable from such file. Do you have any other suggestions? I suggest you create a ticket on this at http://trac.osgeo.org/gdal/#BugTracking On Wed, Jul 30, 2014 at 10:17 AM, Nik Sands <nix...@nixanz.com> wrote: > Hi Devs, > > I'm just planning to convert my own 'in-house' drawing styles management to > using the styles management built into OGR. The documentation at > http://www.gdal.org/ogr_feature_style.html suggests that styles can be in a > '.ofs' file to be automatically associated with a data source of the same > name as the .ofs file. > > But how about if the .ofs file is a stand-alone file passed directly to > OGR_STBL_LoadStyleTable()? Eg, OGR_STBL_LoadStyleTable(table, > "/path/to/styles.ofs") > > In this case the first two calls to 'OGR_STBL_GetNextStyle(table)' will > return the 'styles': > > OFS-Version : 1.0 > 2014-07-30 14:38:36.392 Maps n Trax[47458:60b] StyleField : "style" > > Which are of course not styles at all, but part of the .ofs specification. > > From this, I assume that files passed into OGR_STBL_LoadStyleTable() should > in fact NOT be .ofs files, but merely plain text files with raw style strings > only (and no .ofs specifications). > > Is this correct? > > Would there be any advantage on getting OGR_STBL_LoadStyleTable() to ignore > the first line or two if it is an .ofs file and those two lines match the > spec? > > Cheers, > Nik. > > > OFS-Version: 1.0 > StyleField: "style" > > DefaultStyle: SYMBOL(c:#000000,id:"ogr-sym-3",s:5pt); PEN(c:#000000,w:2pt); > BRUSH(fc:#80808080); LABEL(c:#000000,s:14pt,t:{title}) > > locality: LABEL(c:#000000,s:24pt,t:{title}) > town: SYMBOL(c:#800000,id:"ogr-sym-3",s:10pt); > LABEL(c:#800000,s:24pt,t:{title}) > city: SYMBOL(c:#800000,id:"ogr-sym-3",s:15pt); > LABEL(c:#800000,s:24pt,t:{title}) > region: PEN(c:#000000,w:2pt); BRUSH(fc:#80808080); > LABEL(c:#000000,s:28pt,t:{title}) > country: PEN(c:#000000,w:2pt); BRUSH(fc:#80808080); > LABEL(c:#000000,s:32pt,t:{title}) > > vegetation_low: BRUSH(fc:#A0F0A0); LABEL(c:#004000,s:18pt,t:{title}) > vegetation_medium: BRUSH(fc:#80C080); LABEL(c:#004000,s:18pt,t:{title}) > vegetation_high: BRUSH(fc:#008000); LABEL(c:#004000,s:18pt,t:{title}) > water: SYMBOL(c:#000080,id:"ogr-sym-3",s:2pt); PEN(c:#000080,w:2pt,p:"18pt > 8pt"); BRUSH(fc:#8080C0); LABEL(c:#000080,s:18pt,t:{title}) > contour: PEN(c:#808080,w:1pt); LABEL(c:#808080,s:12pt,t:{elevation}) > > road_unsealed: PEN(c:#A08080,w:2pt,p:"10pt 6pt"); > LABEL(c:#000000,s:18pt,t:{title}) > road_minor: PEN(c:#A08080,w:2pt); LABEL(c:#000000,s:18pt,t:{title}) > road_medium: PEN(c:#A00000,w:4pt); LABEL(c:#000000,s:18pt,t:{title}) > road_major: PEN(c:#A00000,w:6pt); LABEL(c:#000000,s:18pt,t:{title}) > > route: PEN(c:#000000,w:2pt,p:"2pt 4pt"); LABEL(c:#000000,s:18pt,t:{title}) > track: PEN(c:#000000,w:2pt,p:"10pt 6pt"); LABEL(c:#000000,s:18pt,t:{title}) > rail: PEN(c:#000000,w:4pt,p:"2pt 5pt"); LABEL(c:#000000,s:18pt,t:{title}) > cable: PEN(c:#000000,w:2pt,p:"1pt 6pt"); LABEL(c:#000000,s:18pt,t:{title}) > ferry: PEN(c:#000080,w:2pt,p:"18pt 8pt"); LABEL(c:#000080,s:18pt,t:{title}) > > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev -- Best regards, Chaitanya kumar CH. +91-9494447584 17.2416N 80.1426E _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
