|man_made = survey_point|
|A triangulation pillar, geodetic vertex, or other piece of fixed equipment used by topographers.|
|Used on these elements|
|Status: In use|
|Tools for this tag|
A survey point is a triangulation pillar, geodetic vertex, or other piece of fixed equipment used by topographers. An example of these are DGPS radio stations. These points are normally in a fixed location and of a known altitude used for the old fashioned surveying.
How to map
Add a node at the location of the trig point and use the man_made=survey_point. You can also add a name using name=*, its bracket number with ref=*, and its elevation using ele=* (mind the height reference system!).
suggested by User:Chrisana13
- aerial=yes for extra markings meant to be visible in aerial photographs - a white cross, usually
- In the UK tpuk_ref= can be used for the ID of a trig point on the trigpointinguk.com website.
- type=triangulation, type=observation_spot, type=fixed_point and type=benchmark have meaning in nautical maps, where they refer to INT-1 codes B20, B21, B22 and B23 respectively. Note: it would be better to use a different key when tagging these values, for example survey_point=triangulation or survey_point:type=triangulation. See Key:type for more info about why type=* is to be avoided outside of relations.
- Since multiple survey points are possible on one object (eg. a benchmark on a triangulation point/pillar) then in order to avoid multiple values within one key, such as a semicolon-delimited list in survey_point=*, it may be advisable to use something like triangulation_point=yes and benchmark=yes to allow clean coexistence of tags on one node.
Related terms: ‹ survey point › ‹ trig point › ‹ triangulation point › ‹ triangulation pillar › ‹ trigonometrical station › ‹ trigonometrical point › ‹ trig station › ‹ trig beacon ›