[OSM-talk] RFC: geodesy=pillar

Mike Collinson mike at ayeltd.biz
Mon Jul 16 19:45:17 BST 2007


At 07:38 PM 16/07/2007, Dirk-Lüder Kreie wrote:
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>Iván Sánchez Ortega schrieb:
>> Call them triangulation pillars, call them geodetic vertices, call them how > you like. Fact is, I'm gonna upload a few thousand of them in a couple of > days.> > So, I'm proposing the following tags to be applied on nodes:> > geodesy = pillar> Depicts a geodetic (or geodesic) pillar> > geodesy:network = foobar> Several pillars together form a geodetic network, which usually has a name.> > geodesy:reference = 1234> Pillars in the same network are identified by a reference number.
>I couldn't attend SOTM but I do have one request with respect to thenode tagging:Can you use a more general term than "pillar" because that seems toapply to western europe only.
>I'm trying to get a list of german "nodal points" without databaserights constraints. Those are seldomly in the form of a pillar. (in factI have seen no pillars in .de or .at, but different forms of marking thepoint in question. (mostly involving some brass "nail" in some sort ofstone foundation or a cross mark chiseled into the surface of the rock)
>You might also want to register wether the vertex is just for eitherpositional or height reference, or both.
>-

In the UK, I believe geodetic surveyor's marks are called "benchmarks" (I don't recall if that is one or two words).  Would that suffice?

Mike






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