Need to Find a Benchmark in the Woods

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aiwetir
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Need to Find a Benchmark in the Woods

Post by aiwetir » November 25th, 2018, 1:40 am

Kind of a shot in the dark, but I know some of you guys collect them.

For a GPS thing, I need to find a NGS (or Portland) benchmark somewhere in a heavily wooded area, preferably close to Portland and easy access but still at least 1/4 mile of walking to get in or out and must be able to actually find it. The Willamette Stone would probably be good if it were just a little farther off the road and had bigger trees.

I have this reference map which shows a ton of them, but I don't have time to goose chase ones that are hard to locate.
https://arcg.is/LSCmX
- Michael

cfm
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Re: Need to Find a Benchmark in the Woods

Post by cfm » November 25th, 2018, 1:15 pm

There is one on the summit of Mt Tabor

cfm
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Re: Need to Find a Benchmark in the Woods

Post by cfm » November 25th, 2018, 1:31 pm

here is a list of benchmark in the Forest Park vicinity

FP benchmarks

raven
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Re: Need to Find a Benchmark in the Woods

Post by raven » November 25th, 2018, 1:41 pm

This BM in Forest Park may offer the quarter mile hike:
LATITUDE 45 34 33.27494(N)
LONGITUDE 122 46 16.21671(W)

East Zigzag Mountain's would, but it's snow season.

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aiwetir
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Re: Need to Find a Benchmark in the Woods

Post by aiwetir » November 25th, 2018, 8:15 pm

Here's a link to my map if you missed it

https://arcg.is/LSCmX


I know where they are supposed to be but already many are missing, I've been unable to find most of the ones I've looked for down by the airport, so I have my doubts about the rest.
cfm wrote:
November 25th, 2018, 1:31 pm
here is a list of benchmark in the Forest Park vicinity
That link gives me a server error. Tabor is not forested enough for my purposes. Forest Park is though.
raven wrote:
November 25th, 2018, 1:41 pm
This BM in Forest Park may offer the quarter mile hike:
LATITUDE 45 34 33.27494(N)
LONGITUDE 122 46 16.21671(W)
Do you know if that benchmark is there and easy enough to locate?

Thanks!
Last edited by aiwetir on November 26th, 2018, 5:34 pm, edited 1 time in total.
- Michael

raven
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Re: Need to Find a Benchmark in the Woods

Post by raven » November 25th, 2018, 8:42 pm

Don't know but the map report was recent, iirc.

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aiwetir
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Re: Need to Find a Benchmark in the Woods

Post by aiwetir » November 25th, 2018, 11:41 pm

raven wrote:
November 25th, 2018, 8:42 pm
Don't know but the map report was recent, iirc.
I noticed some on the dead end roads in that neighborhood just north of there on Springville Rd, those are probably good.

Thanks
- Michael

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Waffle Stomper
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Re: Need to Find a Benchmark in the Woods

Post by Waffle Stomper » November 26th, 2018, 8:16 am

Have you tried the NOAA site map with satellite view?

https://www.ngs.noaa.gov/datasheets/
"When we try to pick out anything by itself, we find it hitched to everything else in the Universe." - John Muir

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aiwetir
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Re: Need to Find a Benchmark in the Woods

Post by aiwetir » November 26th, 2018, 8:51 am

Waffle Stomper wrote:
November 26th, 2018, 8:16 am
Have you tried the NOAA site map with satellite view?

https://www.ngs.noaa.gov/datasheets/
that's where i got the data for my maps...
- Michael

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Re: Need to Find a Benchmark in the Woods

Post by Lurch » November 26th, 2018, 9:21 am

Why do you need to find a BM? As people have pointed out there's plenty out there, especially if you count PLCC's as well. Are we doing your surveying homework for you? ;)

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