[Tagging] Survey points

John Willis johnw at mac.com
Wed Mar 11 11:49:16 UTC 2015

A survey point is those brass markers in the ground - an official X in the ground of some kind. 

I assume a tower on a distant mountain is a survey_reference_object or similar.  It certainly isn't a point. 


> On Mar 11, 2015, at 5:46 PM, Malcolm Herring <malcolm.herring at btinternet.com> wrote:
> OK, the mapper in question did not reply, but silently removed the tags. This leaves me none the wiser as to the more widespread usage of this tag.
> Looking closer at the data, it appears that "man_made=survey_point" is very often added to prominent objects, particularly towers, masts and lighthouses. Could it be that some survey agencies use these objects as triangulation points? If so, it raises a couple of issues:
> 1. The "man_made" key should refer to the structure, not its usage.
> 2. The drift towards micro-mapping means that such objects, originally mapped as nodes, get converted to plan outlines and the tags moved to that closed way. If the intent of the "survey_point" mapper was to set a lat/lon positional reference, then that scheme is undone.
> Might it not be appropriate to add a note in the Wiki page for this tag that it should not be added it to existing objects, but to always create a separate node?
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