Hi Peter, On Thu, Aug 8, 2019 at 3:56 PM "Peter Löwe" <peter.lo...@gmx.de> wrote: > > Hi Markus, all, [...] > > For me, GDAL2.3.1 in GRASS refuses to accept the "GMLAS:" from https://gdal.org/drivers/vector/gmlas.html: The driver requires Xerces-C >= 3.1
You need to rebuild GDAL accordingly, but > override for the import-driver: > > ogr2ogr -f GeoJSON SMALL.json GMLAS:SMALL.gml -oo REMOVE_UNUSED_LAYERS=YES -oo REMOVE_UNUSED_FIELDS=YES -sql "SELECT * FROM groundsurface" apparently GMLAS is supported. What is the exact error message for " GDAL2.3.1 in GRASS refuses to accept the "GMLAS:""? Markus M > > --> if GDAL-4-GRASS is currently built without GMLAS-support, it would be wortwhile to include it soonish (-> benefits: https://inspire.ec.europa.eu/sites/default/files/presentations/gml_application_schema_made_easy_in_gdal_ogr_and_qgis_-_gmlas_driver_0.pdf) > > Otherwise, the standard GML-driver doesn't feature the REMOVE_xxx options: > ogr2ogr -f GeoJSON SMALL.json SMALL.gml -oo REMOVE_UNUSED_LAYERS=YES -oo REMOVE_UNUSED_FIELDS=YES -sql "SELECT * FROM groundsurface" > > Warning 6: driver GML does not support open option REMOVE_UNUSED_LAYERS > Warning 6: driver GML does not support open option REMOVE_UNUSED_FIELDS > ERROR 6: The GeoJSON driver does not overwrite existing files. > ERROR 1: GeoJSON driver failed to create SMALL.json > > Best, > peter > > > > <peter.lo...@gmx.de> > > > Gesendet: Donnerstag, 08. August 2019 um 15:15 Uhr > Von: "Markus Metz" <markus.metz.gisw...@gmail.com> > An: "Peter Löwe" <peter.lo...@gmx.de> > Cc: grass-user <grass-user@lists.osgeo.org> > Betreff: Re: [GRASS-user] Wrangling CityGML with GRASS ? > > > On Thu, Aug 8, 2019 at 2:59 PM "Peter Löwe" <peter.lo...@gmx.de> wrote: > > > > Hello Markus, Stefan, all, > > > > thanks for all your advice. New challenges have emerged, as the dataset is defined as a polyhedral surface: > > > > I upgraded to GRASS 7.6.1 which comes with GDAL 2.3.1. > > > > The data sources are official CityGML files provided by the German Federal Agency for Cartographyand Geodesy (Bundesamt für Kartographie), which have an ".xml"-extension. > > > > v.in.ogr -2 -o --o input=TEST.xml output=TEST01 > > throws several warnings and creates an empty vector without an points/lines in it: > > > > Warning 1: Unrecognized geometry type : 1015 [<=== note this!] > > No projection information available for layer <Building> > > Übersteuere die Überprüfung der Projektion. > > Check if OGR layer <Building> contains polygons... > > 100% > > WARNUNG: Vektorkarte <SMALL01> existiert bereits und wird überschrieben. > > Creating attribute table for layer <Building>... > > Importing 1 features (OGR layer <Building>)... > > WARNUNG: Skipping unsupported geometry type 'POLYHEDRALSURFACE' [<=== note this!] > > v.in.ogr could force-convert these polyhedral surfaces to multipolygons, at the risk of getting garbage. > > The required change to v.in.ogr would be small, but it would be safer to skip these unsupported feature types in order to avoid garbage output. > > Markus M > >
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