This layer maps the water bodies in and around the area of interest: rivers, streams, canals, drainage ditches, tidal channels and lakes from OpenStreetMap, plus seas from the boundaries_seas reference table. Each feature is rendered individually with its own color and is classified by water type (river, stream, lake, canal, drain, tidal channel, sea) recorded in its metadata, so rivers can be told apart from small streams, artificial drains and coastal channels. Read it to locate surface water near the site and to gauge its distance from the field boundary.
Water bodies are retrieved from OpenStreetMap through the Overpass API within a 2.5 km search radius around the area of interest. The Overpass query selects natural=water + water=lake polygons and waterway ways matching river|stream|canal|ditch|drain|tidal_channel. Each feature is classified into a fine-grained water type (river, stream, lake, canal, drain, tidal_channel) mirroring the OSM waterway tag; ditch and drain are merged into drain. Seas are added separately from the internal boundaries_seas reference table. Requests are served by the 3Bee self-hosted Overpass server (Hetzner) with fallback to overpass-api.de and overpass.openstreetmap.fr.
| Code | Provider | Resolution | Year |
|---|---|---|---|
| WRD_OSMXX_99 | OpenStreetMap | vector (rasterized at ~5 m) | continuously updated |
Linear features (rivers, canals, drains) are buffered by about 40 m so they remain visible once rasterized, then each feature is assigned a unique color and rendered at roughly 5 m native resolution (automatically coarsened for very large areas to respect image size limits). For every feature the layer also computes the geodesic distance to the field boundary and its percentage overlap with the field.