<https://www.csarmento.uminho.pt/site/api/mapping_markers/635>
<http://omeka.org/s/vocabs/module/mapping#lat>
"-8.8272699E0"^^<http://www.w3.org/2001/XMLSchema#double>
<https://www.csarmento.uminho.pt/site/s/postal-ilustrado/item/170695>