[Tagging] Additional sub tags for survey mark

Warin 61sundowner at gmail.com
Mon Nov 20 23:47:30 UTC 2017


Hi,

There have been attempts in the past to add sub tags to 
man_made=survey_point 
https://wiki.openstreetmap.org/wiki/Tag:man_made%3Dsurvey_point

To me there are 2 'types'. they are quite different;

Triangulation (or 'trig point') that are visible over quite some distance (say over 2 km),
used to triangulate a position without having to go to the mark. Usually a pole standing on top of a rise/hill.

Benchmarks that are visible on the surface but cannot be sighted at any distance. They can be small brass plaques fastened to the ground or engraved into stone.
These are used by surveyors by placing a tripod over the mark, thus have to be locally approached.

If consideration is given to https://wiki.openstreetmap.org/wiki/Seamarks/Categories_of_Objects#Control_Points_.28CATCTR.29

then expanding survey_point in a similar manner could be

survey_point:configuration=triangulation/benchmark

I use 'configuration' rather then 'type' or 'category' as it is more specific as to what is meant.

Any thoughts?
Are there any other configurations?






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