soilmap_simple: a simplified and standardized derivative of the digital soil map of the Flemish Region
- 1. Research Institute for Nature and Forest (INBO)
Description
The data source soilmap_simple
is a simplified and standardized derived form of the 'digital soil map of the Flemish Region' (the shapefile of which we named soilmap
, for analytical workflows in R) published by 'Databank Ondergrond Vlaanderen’ (DOV). It is a GeoPackage that contains a spatial polygon layer ‘soilmap_simple
’ in the Belgian Lambert 72 coordinate reference system (EPSG-code 31370), plus a non-spatial table ‘explanations
’ with the meaning of category codes that occur in the spatial layer. Further documentation about the digital soil map of the Flemish Region is available in Van Ranst & Sys (2000) and Dudal et al. (2005).
This version of soilmap_simple
was derived from version 'soilmap_2017-06-20
' (Zenodo DOI) as follows:
- all attribute variables received English names (purpose of standardization), starting with prefix
bsm_
(referring to the 'Belgian soil map'); - attribute variables were reordered;
- the values of the morphogenetic substrate, texture and drainage variables (
bsm_mo_substr
,bsm_mo_tex
andbsm_mo_drain
+ their_explan
counterparts) were filled for most features in the 'coastal plain' area.- To derive morphogenetic texture and drainage levels from the geomorphological soil types, a conversion table by Bruno De Vos & Carole Ampe was applied (for earlier work on this, see Ampe 2013).
- Substrate classes were copied over from
bsm_ge_substr
intobsm_mo_substr
(bsm_ge_substr
already followed the categories ofbsm_mo_substr
).
Unitype
variable in thesoilmap
data source; - only a minimal number of variables were selected: those that are most useful for analytical work.
See R-code in the GitHub repository 'n2khab-preprocessing' at commit b3c6696 for the creation from the soilmap
data source.
A reading function to return soilmap_simple
(this data source) or soilmap
in a standardized way into the R environment is provided by the R-package n2khab.
The attributes of the spatial polygon layer soilmap_simple
can have mo_
in their name to refer to the Belgian Morphogenetic System:
bsm_poly_id
: unique polygon ID (numeric)bsm_region
: name of the regionbsm_converted
: boolean. Were morphogenetic texture and drainage variables (bsm_mo_tex
andbsm_mo_drain
) derived from a conversion table (see above)? ValueTRUE
is largely confined to the 'coastal plain' areas.bsm_mo_soilunitype
: code of the soil type (applying morphogenetic codes within the coastal plain areas when possible, just as for the following three variables)bsm_mo_substr
: code of the soil substratebsm_mo_tex
: code of the soil texture categorybsm_mo_drain
: code of the soil drainage categorybsm_mo_prof
: code of the soil profile categorybsm_mo_parentmat
: code of a variant regarding the parent materialbsm_mo_profvar
: code of a variant regarding the soil profile
The non-spatial table explanations
has following variables:
subject
: attribute name of the spatial layer: eitherbsm_mo_substr
,bsm_mo_tex
,bsm_mo_drain
,bsm_mo_prof
,bsm_mo_parentmat
orbsm_mo_profvar
code
: category code that occurs as value for the corresponding attribute in the spatial layername
: explanation of the value ofcode
Notes
Files
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Additional details
References
- Ampe C. (2013). Databank aardewerk Vlaanderen 2010. Omzetten (zeer) oude legende bodemkartering naar legende bodemkaart Kuststreek. Vlaamse Landmaatschappij Regio West, Bruges, 45 p.
- Dudal R., Deckers J., Van Orshoven J. & Van Ranst E. (2005). Soil survey in Belgium and its applications. In: Bullock P., Jones R.J.A., Montanarella L. (editors). Soil Resources of Europe. Office for Official Publications of the European Communities, Luxembourg, p. 63–71. URL: http://hdl.handle.net/1854/LU-368514.
- Van Ranst E. & Sys C. (2000). Eenduidige legende van de digitale bodemkaart van Vlaanderen (schaal 1: 20000). Universiteit Gent, Laboratorium voor Bodemkunde, Ghent, 361 p. URL: http://hdl.handle.net/1854/LU-125899.