[OSM-talk] Mapping distant objects by triangulation.

[Andy Robinson (blackadder-lists)]

I can give some ideas on this using basic surveying. JOSM measurement tools
will let you do the editing too so its not that difficult to get items
mapped in this way. Especially useful for descrete objects in an otherwise
fairly featureless landscape.

Until I get a moment to drop something on the wiki you might check your
local library for a copy of "Surveying" by Bannister and Raymond. The
current edition is the 7th however earlier editions cover the basics of
elementary surveying as those techniques haven't changed.

Older editions can be picked up now and again on ebay for around a fiver.

Cheers

Andy

>-----Original Message-----
>From: talk-bounces at openstreetmap.org [mailto:talk-
>bounces at openstreetmap.org] On Behalf Of Jeffrey Martin
>Sent: 12 May 2008 9:48 PM
>To: OSM Talk
>Subject: [OSM-talk] Mapping distant objects by triangulation.
>
>I couldn't find the other thread on this topic.
>
>How do you map an object, like a tower on top of a mountain, that
>you don't have access to without expensive survey equipment?
>
>My thought is to use a plumb bob to line up the unknown object
>with some known objects. I would find something like a phone
>pole between me and the mountain tower. I would move along
>a road until the pole and the tower line up. Now I have a straight
>line. Do it again with another strait line and I have two lines
>to define the location.
>
>Would that work?
>
>--
>http://bowlad.com
>
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