Elevation

I have been looking for some way of setting an accurate elevation on my GPS.
Are there any public places which are commonly marked with an accurate
elevation? I was thinking perhaps bridges, water level under large river
bridges, or perhaps some public buildings? I guess I could always ask a
survey crew if I see one with fancy equipment. Unfortunately I do not live
anywhere near any mountain passes which may be marked with an elevation. Are
there any places which I may have overlooked?

You could always go to the beach. That eleveation should be 'zero'.

On Sat, 28 Aug 2010 08:31:16 -0600, YDOD wrote:


The important question is "Where?"

Judging from the timestamp, "In the USA" is a safe guess. So go do
a websearch on "USGS survey benchmark" and marvel that someone has
capriciously spent all your hard-earned tax dollars on something so
trivial as measuring the landscape so you don't have to.

--
It's not hard, it's just asking for a visit by the fuckup fairy.
-- Peter da Silva

http://www.ngs.noaa.gov/cgi-bin/ds_radius.prl

In my case, changing the input to decimal, input of 38.8 122.5 (not neg,
since this is all USA) shows two about four miles away. I selected GPS
only.

DH6285 is a metal disc in the ground, and the datasheet gives instructions
on how to find it. It's right next to the road, so it's pretty easy to
spot.

DK6396 is a CORS gadget, easier to spot. It's about a 12" dome sitting on
a tripod about four feet tall. I haven't stopped to look at exactly where
the "monument" is. It might be on the ground under the tripod, or at the
dome elevation.


--
Clarence A Dold - Hidden Valley Lake, CA, USA GPS: 38.8,-122.5

On 8/28/2010 10:31 AM, YDOD wrote:

How accurate do you need? Google Earth maps give elevation any where on
earth. Contour map I downloaded to MapSource gives elevations.