FLORIVON

Study Extent

The survey consisted of single visits of a half to one day in map squares of approximately 1,3 x 1,01 km until most of the country had been sampled.

Sampling

During single visits of a half to one day all vascular plants were registered on a species list.

Quality Control

Older nomenclature has been converted to newer nomenclature (Heukels’ flora 2005). Observations were checked against the plant atlas (Atlas Nederlandse Flora) with a coarser grid. Observations that would lead to new 5 x 5 km grid cells were validated validated by experts. Taxa that have been lumped in the past were split (where possible) if enough information has been provided, such as names used by well-known observers and their field notes. This has been done for e.g. Thymus serpyllum/pulegioides and Scrophularia auriculata s.l. Final check of non-native taxa by experts.

Method steps

1. * data entry in Turboveg with adapted taxon list (names en numbers cf. Prodromus Florae Batavae) * conversion of taxon names to currently accepted names. We use ‘taxon combinations’ if lumped taxa were recorded * data validation against generalized distribution maps of the Atlas Nederlandse Flora, which is an edited abstraction of the current dataset * conversion of IVON grid system shapefile to WGS84 WKT strings * conversion to MySQL database for publication in IPT

All vascular plants

1. Plantae
   common name: Plants rank: kingdom

The Netherlands