Proposed features/water network
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Three kinds of networks
There is multiple water network, some existing tag specify there type, other don't. The type is not very well defined as some tag used wastewater other sewer...
According to usage stats it seems relevant to define type as :
- water, for drinkable water networks (from well to home)
- sewer, for waste-water networks (from home to wasterwater plan)
- drain, for rain/storm water network
Investigating the 3 kinds of networks related to public water, i identify existing and used tags :
Water network (drinkable)
- boundary=water_protection_area, can define the water protection area where the water is pumped
- man_made=water_well and/or Proposed features/Pumping Station, need clarification on which to be used (both were widely used at the moment), from my point of view water_well is better to describe pumping water from the underground. pumping_station describe pumping from a network segment to another ("lift").
- disused=yes (when the well is no more used)
- drinkable=no (in general water from public network well are not drinkable until treatment in the water_works)
- access=yes|no|private (generally private)
- landuse=water_wellfield, a zone dedicated to water pumping for drinkable water networks, generally with the following characteristics:
- surrounded by a fence with locked gates, access reserved to the operator,
- sparsely scattered technical buildings (wells, pumps, power substations), linked by service tracks/roads,
- surface generally covered with grass, with rare other vegetation (scrubs, wood), since grass is easy to mow and can be used to trap superficial pollution.
A water_wellfield is a landuse per se, excluding any other activities in the same zone. It can be associated with a strict boundary=protected_area, or included into a larger, less strict one. In France, these landuses are known as "Champ captant" or "Champ de captage". The law defines 3 standard protection levels. A "champ captant" is often associated with the strictest one. Several examples in France (Google aerial) : near Lyon , near Dijon, near Grenoble
- man_made=water_works, for water plant that made pumped-water (from river or underground) drinkable
- man_made=water_tower, for tower reservoir
- man_made=reservoir_covered, for underground/covered reservoir
- landuse=reservoir, for open reservoir
- manhole=*, ground access to the undergroud network
- man_made=pipeline, the underground network
- amenity=drinking_water, small tap of drinking water
- man_made=measuring_point, for groundwater measuring point
Wastewater network (sewer)
- man_made=wastewater_plant, final destination of sewer and treatments
- Proposed features/Pumping Station, pumping sewer on the network to transport to the wastewater plant (lift pump)
- man_made=pipeline, the underground wastewater network
Rain/Storm water network (drain)
- landuse=basin, with basin=* for infiltration basins, detention basins and retention basins (rain/storm water tank)
- man_made=reservoir_covered, for underground rain water reservoir
- landuse=reservoir, for open rain water reservoir
- man_made=pipeline, the underground rain/storm network
- Proposed features/Pumping Station, pumping rain water on the network to transport to another part of the network (lift pump)
- man_made=storm_drain, for storm drain in the street
Statistics from tagstat on 12th july 2010 :
- reservoir = 166 250 (landuse)
- pipeline = 9 590 (man_made) by not always related to water
- water_tower = 9 000 (man_made)
- wastewater_plant = 5 890 (man_made)
- reservoir_covered = 3 060 (man_made)
- water_works = 1 300 (man_made)
- water_well = 400 (man_made) + 19 (amenity)
- pumping_station = 112 (man_made) + 69 (water_way)
- manhole (other used : heat, gas, telecom...)
- manhole=water : 1 611
- manhole=heat : 1 037
- manhole=drain : 291
- manhole=sewer : 229
Some tags can be used for multiple network so it seems smart to add a description, ie :
- man_made=reservoir_covered can be precise with type=water|sewer|drain
- same for pumping_station or pipelines
We can assume that without type=*, its a water element ?
For those tags, general sub-tags can describe the elements :
- operator=* (if known)
- name=* (if known)
- capacity (using SI Unit : m3 for reservoir, m3/second for pump or plant)
- diameter (using SI Unit : meter) for pipeline and manhole
- ref=* (if known)
I also note some strange, obsolete or misued tags :
- Proposed_features/Village_Pump, seems the same as water_well (with pump=manual|powered)
- pump_house ?
- pump_station, like pumping_station ?
- pump ? what kind of pump ?
- water_pump, like pumping_station ?
- water_tank, like reservoir or covered_reservoir ?
According to my experiences (july 2010) a few of those tags are rendered :
|Proposed features/Pumping Station||no||no|
|man_made=water_tower||node / way||node / way|
|man_made=wastewater_plant||no||node / way|
-- User:Padorange 28th june 2010
Water network elements
We are an association operating a water network and we have started mapping part of our network. We're using OpenStreetMap for that purpose, but some features we need seem to be missing. (I found Proposed_features/water_tower, man_made=water_well, man_made=water_works, land_use/reservoir which could apply.) We need a vocabulary to describe:
water meter water "switch" (generally at street level) underground water pipes (a type of "ways"?) pumping stations
We'll use the existing "operator" tag to indicate ownership of the network elements.
We could use a "diameter" tag e.g. for pipes diameter.
- Great, go ahead. Even if features aren't on the Map_Features, some of those have straighforward tags in use. Already in use are at least (and some of them are documented on this wiki):
- man_made=pipeline + type=water + location=underground + diameter=* for ways
- pipeline=valve on nodes
- manhole=water + hole:diameter=* (often would be on the same node as pipeline=valve), but some are bigger manholes.
- amenity=fire_hydrant +location=underground
- man_made=pumping_station; The most notable attribute might be the maximum pumping capacity (in litres/cubic meters per second?)
- I'd assume for a water meters that a pipeline=meter on the node would suffice? You can add other information, too, if known.
- I (and some others) have been trying to survey the pipes around here by deducing the connections from the stated diameters, there's a browsable map (of Scandinavian region) you can see here. Blue lines are water pipes, red is district heating. Alv 06:50, 4 June 2010 (UTC)
Please comment on the discussion page.