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Public-images-osm logo.svg inlet = grate
Storm drain.jpg
A horizontal grate that covers sumps, tunnels or culverts, on pavements or in a street to catch storm water.
Group: Man made
Used on these elements
may be used on nodesshould not be used on waysshould not be used on areasshould not be used on relations
Useful combination
See also
Status: approvedPage for proposal

 Grates are installed over storm drains to cover sumps on pavements or in streets to prevent debris and people from going down the drain. They are mostly horizontal.

Often grate covered inlets are found next to kerbs, but with an attached section of kerb, these should be tagged as inlet=kerb_grate, instead. See examples on the inlet=kerb_grate wiki page for a deeper explanation. Only use inlet=grate, when the grate is not connected to a section of the kerb, made out of the same material.

It may be useful to use this value on intersection nodes between the drain and barrier=kerb, when adjacent to the kerb (see example below).

Tagging a manhole drain

Any manhole drain tagged as inlet=grate should also use the tags man_made=manhole and manhole=drain.

It may be useful to document the shape of the grate with shape=*, and additionally the dimensions with width=*, length=* or diameter=*. material=* and colour=* can also be used.

If the grate is not made of a single material, but instead is covered in the same way as the surrounding surface, the values from the surface=* tag can be used inside of the material=* key (e.g. material=paving_stones). The additional details that follow that tagging scheme can also be used (e.g. paving_stones:pattern=*), however colour=* should be used instead of surface:colour=* (see above).


Photo Location Tagging Comments
Common storm drain grate Germany






Horizontal grate used to catch storm rain water with debris retention, found in the street and on pedestrian areas and roads
Gutter -343 (26099923700).jpg UK man_made=manholemanhole=drain




Grate inlets at the side of roads or pavements (that may be connected/adjacent to the kerb) should not use inlet=kerb_grate, unless the grate is also connected to a section of the kerb (made of the same material). See examples on the inlet=kerb_grate wiki page for a deeper explanation.
Gutter -514 (32547752123).jpg man_made=manholemanhole=drain




2020-12-30-Streethole-covers-Weststrasse-2-Benrath.-Foto-2.jpg Düsseldorf-Benrath, Germany

See the manhole=drain wiki page for more examples.

Incorrect use on a covered gutter

Although it may seem tempting, this tag is not to be used on long covered gutters that also act as a drain (see example image below) when they are mapped using wayways. It should only be used on inlet drain nodenodes. No consensus has been made on how to tag this feature but there has been some discussion on the Key:inlet talk page. Whichever tagging method is decided upon, man_made=manhole and manhole=drain should not be used, as the wayway is not a manhole drain. The tags width=*, material=* and colour=* can be used in a similar manner to a manhole drain.

A shallow gutter covered by a grate to catch storm water at the edge of a road. It moves this water down a channel to a more significant drain/ditch.

See Also

  • inlet=kerb_grate for inlets at the side of kerbs that have a connected section of kerb, made of the same material
  • inlet=kerb_opening for sewer openings at the side of kerbs that do not have a physical grate covering them