https://openstreetmap.org/copyright | https://openstreetmap.org |
Copyright OpenStreetMap and contributors, under an open license |
https://openstreetmap.org/copyright | https://openstreetmap.org |
Copyright OpenStreetMap and contributors, under an open license |
I've mapped a detention basin near me using tags I found on http://wiki.openstreetmap.org/wiki/Tag:landuse=basin (which render them as water areas in the default render on osm.org). Is that what you've described, maybe?
Yes a detention basin looks right. Thanks for your help there.
Now the basin just needs mapping. I can try and get up this way soon, but if anyone knows the area well and wants to draw in the features that would be excellent.
It's not usually flooded by default though, so it should display as land - not water.
This is confirmed as a dry detention basin and added as basin area. While this is in fact dry under normal conditions, the OSM definition of a basin is "An area of land artificially graded to hold water." As it is an area designed purely for the purposes of storing water, it should not necessarily display as land. Note: similar dry basin schemes have been shown the same way.
The 4.10.0 release of carto adds support for intermittent=yes or seasonal=* causing a different rendering in the default map layer - might be worth considering. See https://github.com/gravitystorm/openstreetmap-carto/pull/3178