Landuse = Basin
- Either that translation link is wrong or the image is wrong. If the translation was right then the whole map should be blue, because all land is part of some catchment area. Can somebody give a better explanation for this one. And if it is what I think is meant, then what is the difference with 'landuse=reservoir'. --Cartinus 12:05, 29 December 2007 (UTC)
- I differ it that way:
- a reservoir is a waterarea which exists because a dam was build at the end of a valley, so the water can dam up (other word for storage lake).
- a basin is a waterarea in a man-made pool or container (e.g. the pools of wastewater-plants) --Cbm 05:02, 30 December 2007 (UTC)
- I differ it that way:
Can we clarify the meaning of the tag landuse=basin? The current definition, "An area of land which drains into a river." seems to be correct from the standpoint of the science of hydrology, but it is not a land use (since it describes a natural feature of the landscape, not how humans are using a particular plot of land).
A comment on the talk page suggests that landuse=basin may indicate a man-made pond with sharp borders, such as a sewage treatment pool. However, that is not a land use either, it is a man-made object.
After reading the description of the new tag, basin=infiltration, I suspect that landuse=basin means that a plot of land has been designated as a place for rainwater to pool and be held back so that it does not enter a river too quickly.
If this is so, then landuse=basin does not indicate that the land in question is always under water or even under water most of the time. Thus, the default rendering should be be solid blue, but rather blue raindrops as with landuse=basin, basin=infiltration.
What are your thoughts? How can these questions be resolved?
- I only saw, that landuse=basin in combination with basin=* is not rendered well because of "double landuse" inside mainly dry basins ... So I changed rendering in Osmarender ... But reading http://en.wikipedia.org/wiki/Basin shows, that definition of a basin might be much broader than infiltration/detention/... so rendering (and tagging) of basins may be correct for other cases? --Mueck 11:20, 14 June 2010 (UTC)
Basins with masonry walls
Where I live, water for irrigation purposes is traditionally collected from springs, streams or rain inside of large vats (say, ten meters wide or long, two meters deep) which can be partly dug into the terrain, but more often they are enclosed in part or wholly by walls made of bricks (picture of an ancient one on Wikimedia Commons). They serve the same function as the basins pictured in this page, but they are more appropriate for dryer climates and harsher orography, so I expect them to be common in other Mediterranean countries as well. landuse=basin is already commonly used to tag these features (alongside landuse=reservoir for an unfortunate case of false cognates), but since I’m not a native English speaker I’d like some confirmation: is this tag appropriate even for features which technically aren’t built just by digging the ground but can involve masonry as well?