watercourse_100mseg: the Flemish watercourses represented by 100-meter line segments and corresponding downstream endpoints
Description
The data source watercourse_100mseg
is derived from the raw data source 'watercourses'. It represents all officially known watercourses of the Flemish Region as line segments of 100 m (or < 100 m, for the most upstream segment of a watercourse). The data source can be used as a base layer of statistical population units (line segments) and corresponding anchor points, in the design of monitoring and research of watercourses.
The data source is a GeoPackage with two spatial layers:
-
watercourse_100mseg_lines
: the line segments; -
watercourse_100mseg_points
: the corresponding downstream endpoints ('downstream' as defined inwatercourses
).
The coordinate reference system is 'Belge 72 / Belgian Lambert 72' (EPSG-code 31370). Both layers have the same number of rows, and they share the same attributes:
rank
: a unique, incremental number for each segment/endpoint. It just reflects the downstream-to-upstream order of segments within each original line.vhag_code
: the VHAG code from the rawwatercourses
data source. It distinguishes the different watercourses, so it is common to all segments/points that belong to the same watercourse.
This version was derived from version 'watercourses_20200807
' (Zenodo DOI) as follows:
-
each line ('watercourse') of
watercourses
is split into segments of 100 m, where the remaining segment of < 100 m (per original line) is situated most upstream. For this step, the direction of the lines has been reverted (inwatercourses
the direction is from upstream to downstream). A unique rank number is assigned to each segment, as well as the VHAG code from the corresponding line inwatercourses
. -
the downstream endpoint of each segment is located, and assigned the same attributes (
rank
andvhag_code
).
See R and GRASS code in the GitHub repository 'n2khab-preprocessing' at commit 6b1d8f7 for the creation from the watercourses
data source.
A reading function to return the data source in a standardized way into the R environment is provided by the R-package n2khab.
Files
Files
(100.1 MB)
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