Westra, Toon · Vanderhaeghe, Floris · Herr, Cécile

6.2 MB

This map is a combination of the standardized habitat map of Flanders (version habitatmap_stdized_2025_v1) and the watersurface map of Flanders (version watersurfaces_2024). It contains standing water Natura 2000 habitat types (2190_a and 31xx) and regionally important biotopes (rbbah) in Flanders. The polygons with 2190_a habitat (dune slack ponds) are generated by selecting all watersurface polygons that overlap with dune habitat polygons (21xx) of the standardized habitat map. For each of the other aquatic habitat types (31xx and rbbah) we select the watersurface polygons that overlap with the selected habitat type polygons of the standardized habitat map. We also select polygons of the standardized habitat map that contain standing water types but do not overlap with polygons of the watersurface map. The watersurfaces_hab.gpkg file is a GeoPackage that contains: watersurfaces_hab_polygons : a spatial layer with the selected polygons that contain standing water habitat types or regionally important biotopes. Attributes: polygon_id polygon_id_ws : id for the polygon in the watersurfaces data source polygon_id_habitatmap : id's of all overlapping polygons of habitatmap_stdized that contain standing water habitat. The different id's are separated by '+'. description_orig : descriptions of all overlapping polygons of habitatmap_stdized that contain standing water habitat. The different descriptions are separated by '+'. year_assessment : the year when the types in the polygon have been assessed method_assessment : the method used to assess the types in the polygon watersurfaces_hab_types : a table with information on standing water habitat types and regionally important biotopes in each watersurface polygon. Attributes: polygon_id type : habitat or RIB type certain : TRUE when the type is certain and FALSE when the type is uncertain code_orig : original type code in the raw data source ' habitatmap ' The R-code for creating the watersurfaces_hab data source can be found in the GitHub repository 'n2khab-preprocessing' at commit 6a0f3ca . A reading function to return the data source in a standardized way into the R environment is provided by the R-package n2khab .

Westra, Toon · Vanderhaeghe, Floris · Herr, Cécile

100 MB

The habitatmap_stdized.gpkg file is a processed version of the Natura 2000 habitat map of Flanders (De Saeger et al., 2025; 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 polygon can consist of maximum 5 different types (habitat (sub)types and regionally important biotopes). This information is stored in the columns HAB1 , HAB2 ,..., HAB5 of the attribute table. The fraction of each type within the polygons is stored in the columns PHAB1 , PHAB2 , ..., PHAB5 . The habitatmap_stdized.gpkg file is a GeoPackage that contains: habitatmap_polygons : a spatial layer with every habitat map polygon that contains a Natura 2000 habitat or RIB type. habitatmap_types : a table with information on the habitat and RIB types (HAB1, HAB2,..., HAB5) that occur within each polygon of habitatmap_polygons. The processing of the habitatmap_types table included following adjustments: For some polygons the type 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 phab for each new row simply set to the original value of phab . The variable certain will be FALSE if the original type code consists of 2 or 3 possible types, and TRUE if only one type is provided. Some polygons contain both a standing water habitat type and rbbmr : 3130_rbbmr , 3140_rbbmr , 3150_rbbmr , and 3160_rbbmr . Since habitatmap_stdized_2020_v1 , the two types 31xx and rbbmr are split up and one row is created for each of them, with phab for each new row simply set to the original value of phab . The variable certain in this case will be TRUE for both types. After those steps, a given polygon could contain the same type with the same value for certain repeated several times, e.g. when 31xx_rbbmr is present with phab = yy% and 31xx is present with phab = zz%. In that case the rows with the same polygon_id , type and certain were gathered into one row and the respective phab values were added up. The R-code for creating the habitatmap_stdized data source can be found in the GitHub repository 'n2khab-preprocessing' at commit 37e58c1 . A reading function to return the data source in a standardized way into the R environment is provided by the R-package n2khab . Attributes of habitatmap_polygons : polygon_id description_orig : polygon description based on the original type codes in the raw habitatmap year_assessment : the year when the types in the polygon have been assessed method_assessment : the method used to assess the types in the polygon Attributes of habitatmap_types : polygon_id type : the interpreted habitat or RIB type certain : TRUE when type is certain and FALSE when type is uncertain code_orig : original type code in raw habitatmap phab : proportion of polygon covered by type, as a percentage. Since version habitatmap_stdized_2020_v1 , rows are unique only by the combination of the polygon_id , type and certain columns.

Wang, Yafei

15 files · 129 KB · tiff

A gridded time-series dataset reconstructing population distribution across the Yellow River Basin, China, from 1000 to 2000 AD, with a temporal resolution of one century and a spatial resolution of 10 km.

Weiskittel, Aaron R.

8.0 MB

Version 2.0.0 of the Composite Site Productivity Index (CSPI) for the 48 conterminous United States at 30 m (EPSG:4326). Where v1.0.0 provided a single-metric Environmental Site Index, v2.0.0 delivers a true multi-metric composite. The headline product (CSPI_v2_5component_30m.tif) is the z-score weighted average of five independently fitted productivity layers, sigma-clipped at +/-3 and rescaled to 0-100: (1) Environmental Site Index (ESI v7), (2) Biomass Growth Increment from FIA remeasurement pairs, (3) asymptotic aboveground biomass (Chapman-Richards), (4) Miami-model NPP from PRISM climate, and (5) MOD17 satellite NPP. Both NPP formulations are retained as independent components because each captures a distinct productivity signal and prior analysis showed both perform well. Coverage correction: an earlier internal v2 composite used only the Miami NPP, which had been derived from a truncated climate input and was therefore empty over New England and the coastal Pacific Northwest. The climate inputs were regenerated from intact source data and MOD17 NPP was added as a second NPP component; this release has complete CONUS coverage including northern Maine, Oregon, and Washington. Forest-masked, 1 km aggregate, and composite-scale uncertainty layers accompany the headline composite, along with the ESI predicted-site-index products and the component input layers.