The examples for SPATIAL Queries:
http://nomisma.org/documentation/sparql#e2
http://nomisma.org/documentation/sparql#e3
do not work as expected. The examples are iqnoring the "spatial" parts. All results are listed, no matter what is entered regarding "spatial".
The reason is probably the retirement of Spatial:
https://jena.apache.org/documentation/query/spatial-query.html
So it might make sense to remove the examples until there is a alternative.