Claus Nagel
Claus Nagel
In CityGML, we have objects (i.e., things having an identifier) that are not features, such as `ImplicitGeometry`. Also ADEs can define such non-feature objects (e.g., `WeatherData` in Energy ADE). In...
What is the purpose of the `space_or_boundary_type` column in the `feature` table? And if we need it, shouldn't it rather be moved to `objectclass`?
What is the purpose of the `datatype` column in the `property` table?
xAL supports free format address representations. You can have one or more `` elements and each address line stores a simple string. There is no specification on the syntax or...
The `"location"` property of a building `"address"` is defined to be a `"MultiPoint"` geometry. As per definition in the v0.3 schema, a `"MultiPoint"` requires an `"lod"` property. Whereas `"lod"` is...
After fixing #208, we should also think about dropping the "val_implicitgeom_refpoint" coulmn from "property". The column is used to store the reference point of an implicit geometry. Since the point...
As discussed in our last subgroup meeting, here is a PDF with some comments and edits for chapter 6.1. [21-006.pdf](https://github.com/opengeospatial/CityGML-3.0Encodings/files/8178986/21-006.pdf)
In `AbstractCityObjectType`, the `generalizesTo` property has the type `gml:ReferenceType`. This means it can only be used to reference a city object but it cannot contain a city object inline. This...
In CityGML 2.0, the geometry of a feature like `Building` can be stored with the feature itself but also spread across various sub-features on different hierarchy levels. Moreover, sometimes the...
From a developer's point of view, I think XLinks are really one of the things that cause a lot of pain when processing (City)GML datasets. And what comes on top:...