NDFF Florabase before 1993

The FLORABASE file consists of observations from 495 sources. These sources include: - The organisation that collected the data (e.g. a provincial authority, the Limburg Natural History Society) - The method used (e.g. a vegetation study, a full area inventory survey, or a monitoring program) - Medium (e.g. digital or paper form or report) - Characterists of the project (e.g. work placement or atlas project) for which the observations were made. Many of these projects employ a standardised method of collecting data, which will be added to the observations in the future. For now, these observations will be categorised as individual observations, which until 1993 were checked by hand by R. van der Meijden, among others. Dataset available via https://www.ndff.nl/english / serviceteamndff@natuurloket.nl Positive observations without zeros. https://www.ndff.nl/overdendff/validatie/protocollen/12-005-florabase-overige-losse-waarnemingen-voor-1993