Results 6 issues of Patrick Brosi

This PR contains the stuff added during the debug process for #80 that we should keep in master. This mainly includes some safeguards in `areaInAreaApprox` and `boxIdIsect` which explicitly catch...

The intermediate geometry objects to which the `geo:asWKT` predicates are attached should be in the `NAMESPACE__OSM2RDF_GEOM` namespace (`osm2rdfgeom:` in the generated `.ttl`). For ways, these are in the `NAMESPACE__OSM2RDF` namespace...

We should be fully conform with the GeoSPARQL standards for types [geo:SpatialObject](https://opengeospatial.github.io/ogc-geosparql/geosparql11/spec.html#_standard_properties_for_geospatialobject) and [geo:Feature](https://opengeospatial.github.io/ogc-geosparql/geosparql11/spec.html#_standard_properties_for_geofeature). In particular, a `geo:Feature` must have the following properties: `geo:hasGeometry, geo:hasDefaultGeometry, geo:hasCentroid` and `geo:hasBoundingBox` That is,...

It would be nice for the TTL dumps to contain some information on how they were created. This PR so far adds a single triple containing the `VERSION_GIT_FULL` string. It...

I see two issues with the intersection relations as they are currently implemented: 1) The `intersects_area` relation is exactly equivalent to the `contains_area` relation (see https://github.com/ad-freiburg/osm2rdf/blob/master/src/osm/GeometryHandler.cpp#L453), which effectively means that...

The method `normalizeQuery()` https://github.com/ad-freiburg/qlever-ui/blob/1ad9df580008cf470c30b2d586001f9dc10642e6/backend/static/js/helper.js#L26-L33 fails to return valid SPARQL in the following cases: 1. When a comment appears in a line containing a `