|man_made = survey_point|
|A triangulation pillar, geodetic vertex, or other piece of fixed equipment used by topographers.|
|Group: Man made|
|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.
See alsoand .
How to map
- 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, ...)
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.
- 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.