gazetteer/ontology update

• various fixes to enable full support for automatically matching territories with a gazetteer and concepts with an ontology
• complete overhaul of matchOntology() making it vastly more efficient and easier to use/debug
• adapt normGeometry() and normTable() to the changes in matchOntology()
• start making use of the spatial/topological information derived from normalizing new geometries (that were not part of the initial geometry data set) by updating the gazetteer accordingly. Only if a concept does not overlap with more than (100 - thresh), is it added as a new harmonized concept. In that case, the new geometry is one that is distinct from the harmonized geometry.

EMS revision

A revised version of arealDB to resubmit to EMS.

Accepted on CRAN

0.3.4

incl. updates

Environmental Modelling and Software submission

This release of arealDB accompanies a submission to the journal "Environmental Modelling and Software", the preprint of which can be found at https://arxiv.org/abs/1909.06610