Elevation

YDOD wrote:

It should be easy to find USGS/Geodetic Survey Benchmarks.
[google or ask your county surveyor]
If you live in open country near hills, you might have already stumbled
over a small circular metal marker with a centering dot. If you see one
with BM, if I recall the numbers after that are the elevation. Some
areas also have local survey marks used to assist in surveying the local
landscape.

YDOD wrote:

Mt. Hollywood in Los Angeles is marked at its peak with a copper stamp
in concrete giving the elevation in feet.

Perhaps a state or national p ark in your vicinity has such monument
markers.

YDOD wrote:
Use what they call an adjusted benchmark. You can find them for your
state here:


http://benchmarks.scaredycatfilms.com/

I'm surprised this hasn't already been mentioned based on popularity of
Geocaching, but the free Geocache website provides an international list of
Benchmarks that can be searched based on your current location. A listing
of nearest benchmarks can be downloaded to most GPS, certainly including
most Garmins. I live in a rural area of SE PA, and have found dozens of
benchmarks within a half-hour. At least three in walking distance. Most
are USGA brass markers set in bridge abutments, sidewalks, or even highway
median strips. These all include markings indicating government approved
elevation measurements.

The site at: http://www.geocaching.com/ may require you register, but it is
free. The left navigation includes a link for "Find a Benchmark".

It's kind of fun to find them, and then once you find the nearest one, you
can always go back to calibrate your GPS.

Good luck

wrote:


Why do you say "international list . . ."?

It is NGS data - USA and territories only afaik.

I put in a couple of Canada postal codes and it says "no data for your
area"?

Has anyone seen this to work for other "international" locations?