The <code>habitatmap_stdized.gpkg</code> fileis a processed version of the Natura 2000 habitat map of Flanders (De Saeger et al., 2020; see also De Saeger et al. 2017). It contains all polygons with Natura 2000 habitat types or regional important biotopes (RIB).This file is used as a basis for designing monitoring schemes in Flanders. In the original habitat map, every polygoncan consist of maximum 5 different types (habitat (sub)types and regionally important biotopes). This information is stored in the columns <code>HAB1</code>, <code>HAB2</code>,., <code>HAB5</code> of the attribute table. The fraction of each type within the polygons is stored in the columns <code>PHAB1</code>, <code>PHAB2</code>, ., <code>PHAB5</code>. The <code>habitatmap_stdized.gpkg</code> file is a GeoPackage that contains: <code>habitatmap_polygons</code>: a spatial layer with every habitat map polygon that contains a Natura 2000 habitat or RIBtype. <code>habitatmap_types</code>: a table with information on the habitat and RIB types (HAB1, HAB2,., HAB5) that occur within each polygon of<code>habitatmap_polygons.</code> The processing of the habitatmap_types table included following adjustments: For some polygons thetype is uncertain, and the type code in the raw habitatmap data source consists of 2 or 3 possible types, separated with a ','. The different possible types are split up and one row is created for each of them, with <code>phab</code> for each new row simply set to the original value of <code>phab</code>. The variable <code>certain</code> will be <code>FALSE</code> if the original type code consists of 2 or 3 possibletypes, and <code>TRUE</code> if only one type is provided. Some polygons contain both a standing water habitat type and <code>rbbmr</code>: <code>3130_rbbmr</code>, ...