KC, I looked into this a few years ago, so things may have changed. A write-up of what I did with both kmz and pdf is at https://geozoneblog.wordpress.com/2021/12/09/dav-new-products/ with the details toward the bottom. It might be that you'd need to add a layer to the kmz with a point and label where you want them.
Kirk Waters, PhD NOAA Office for Coastal Management Applied Sciences Program coast.noaa.gov/digitalcoast On Thu, Jul 18, 2024 at 11:50 AM Open Land LLC via gdal-dev < gdal-dev@lists.osgeo.org> wrote: > Hi Everyone, > > I just wanted to ask - Is this the right place to post questions? I put in > a post several days ago, and just want to make sure I'm putting it in the > right place, because I have not posted to this group before. Thank you - KC > > ---------- Forwarded message --------- > From: Open Land LLC <realoptio...@gmail.com> > Date: Mon, Jul 15, 2024 at 9:00 PM > Subject: How to add labels to DEM contour lines > To: <gdal-dev@lists.osgeo.org> > > > Hi everyone, this is my first post. I've also posted this to > https://stackoverflow.com/questions/78751101/labelling-contour-lines-with-ogr-style > > I'm trying to add labels to DEM contour lines. > > I'm working with GDAL 3.6.2. , which I installed using Anaconda . I have > some DEM data from USGS which I wrote as a contour map to a KML file using: > > gdal_contour small.tif /home/ubuntu/node/geotools/contour.kml -i 3.0 > -f KML -a ELEVATION > > When I open contour.kml in vim, I can see that its made up of features > like: > > <Placemark> > > <Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>0</fill></PolyStyle></Style> > <ExtendedData><SchemaData schemaUrl="#contour"> > <SimpleData name="ID">39</SimpleData> > <SimpleData name="ELEVATION">525</SimpleData> > </SchemaData></ExtendedData> > <LineString><coordinates>-89.2626638689733,46.1525006611575 > -89.262663868958,46.1525469572921 -89.2627325352002,46.152622208059 > -89.2628251277396,46.1526266807347 -89.2629177202847,46.1526141000471 > -89.2629982621728,46.1525469573863 > -89.2629982621882,46.1525006612516</coordinates></LineString> > </Placemark> > > Clearly there is a style component available , but I'm not sure how to > work with it to add elevation labels or custom colours. My suspicion is > that OGR_STYLE is used to do things like this ( > https://github.com/OSGeo/gdal/issues/835)(https://gdal.org/user/ogr_sql_dialect.html#ogr-style > ), but I can't find any examples. How can this be done? > > Thank you very much, > > KC > > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/gdal-dev >
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