Tag:man_made=survey_point
(Redirected from Survey point)
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 man_made = survey_point
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A triangulation pillar, geodetic vertex, or other piece of fixed equipment used by topographers. 
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| Group: Man made |
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| Status: in use |
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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.
See also 
Triangulation station and Benchmark (surveying).
How to map
Add a node at the location of the trig point and use the man_made=survey_point.
Additional tags
- name=*
- ref=* its bracket number. See the discussion page for comments on 'bracket number'.
- ele=* its elevation using (use the height reference system specified in ele=*!)
- survey_point=*: this key seems like a mess, please comment on how to interpret or split this key (can contain dozens of values, like bm_new, trig_3rd, suppl, forest_trig, mine, bm_cgs, taipei, suppl_TW, polygon_IT, sectionstake, satellite_1st, trig_2nd, ...)
Possible Rendering
suggested by User:Chrisana13
Additional tags
- 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.
- 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.
