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Got a Rhode Island Fisheries disk? LW2551. I'm considering going after this one on my vacation, depending on whether it's private property, or easy to sneak into...

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I was in Woods Hole Massachusetts last weekend and logged a few tidal bench marks. One (LW1577 "844 7930 TIDAL 7") was dated 1913 and it's the earliest USC&GS disk I have found (although I've found an earlier USC&GS "marking bolt").

 

It's remarkably similar to later disks. It looks like the standard tidal b.m. disk minus the circle around the center bench line. And interestingly, although it's the oldest of the surviving marks at the site, it was number 7! I wonder what happened to the original 1 - 6? Probably some of those were chiseled squares, crosses, bolts, etc.

 

Here's a picture:

 

08345ba8-c612-4c21-998d-44a9765462b3.jpg

 

Anyone know when the USC&GS started using these disks? What's the ealiest USC&GS disk anyone here has found? I know the USGS used disks very similar to today's by 1900 (I logged one last month in Maine which was discussed in another thread).

 

Buckbrook: is this a new type for your list, or have you got one like this before?

Edited by Papa-Bear-NYC

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..speaking of mountains - here's one that was reset in a drill hole on a mountaintop on the border between Huntingdon & Franklin Counties in S. Central PA:

56772556-c6af-4fbc-994f-a96e99a1a4aa.jpg

KW2888

* Note - Wayne County is in the extreme NE part of PA - a good 100 mi away...

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A couple more for the list. Both found on July 4th in St. Joseph, MO

 

KE0381 - Monumented by "RBNF" [Researched But Not Found]. I assume it was the CB&Q Railroad or the State Hwy Dept. Both would be interested in the clearance between the rail and the overpass.

 

AD9796 - Missouri Dept of Natural Resources. Not really a disk, but a 8-sided piece of metal (copper?).

 

Bob

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I was in Woods Hole Massachusetts last weekend and logged a few tidal bench marks. One (LW1577 "844 7930 TIDAL 7") was dated 1913 and it's the earliest USC&GS disk I have found (although I've found an earlier USC&GS "marking bolt").

 

It's remarkably similar to later disks. It looks like the standard tidal b.m. disk minus the circle around the center bench line. And interestingly, although it's the oldest of the surviving marks at the site, it was number 7! I wonder what happened to the original 1 - 6? Probably some of those were chiseled squares, crosses, bolts, etc.

 

Here's a picture:

 

08345ba8-c612-4c21-998d-44a9765462b3.jpg

 

Anyone know when the USC&GS started using these disks? What's the ealiest USC&GS disk anyone here has found? I know the USGS used disks very similar to today's by 1900 (I logged one last month in Maine which was discussed in another thread).

 

Buckbrook: is this a new type for your list, or have you got one like this before?

 

Here is an earlier pipe cap. I think the oldest USC&GS that I have found.

22639_100.jpg

CallawayMT

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Two unusual finds from my vacation. Don't know if they're on the list:

ec461772-5985-4b60-84ad-2087d2e644d1.jpg

LX3442

Town of Old Lyme, Ct

6ad29199-c3db-4ffd-a9ba-ed28751aa3d5.jpg

LW2551

Commisioners of Shell Fisheries - State of Rhode Island

Edited by Harry Dolphin

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Ok, it's been a while since the last update. There will be another update shortly, with half a dozen from this discussion, plus a few more from other topics, some from Waymarking and whatever else I can find.

 

From the Gallery:

LX1987 (CT) Town of Norfolk

OW0285 (US) U.S. General Land Office - Reference Mark

AK0721 (US) US Engineer Dept. - Harbor Survey - Jacksonville Florida

GJ0237 (US) US Weather Bureau (odd disk)

SA2543 (WA) City of Richmond

SA2024 (US) War Department Corps of Engineers, U.S. Army [Type IV]

JO0570 (US) U.S. Geological Survey - Reference station [Type II]

EV9150 (CA) **Metropolitan Water District of Southern California [Type VI]

AI8987 (KY) Woolpert Control Station

JS4819 (CA) Sacramento County Department of Public Works

MB1190 (OH) Mahoning County Engineers

TP1198 (US) United States Canada International Boundary Commission [Type V]

EF1011 (US) U.S. Engineer Department [Type IV]

QE2642 (US) US Army Engineers - Portland District

 

Several that I found recently:

DOINPS (US) Department of Interior - National Park Service pipecap

KOO&PO (NM) Koogle & Pouls Engineering

 

Note that the Koogle and Pouls firm, based in Albuquerque, did surveying work for the US House of Representatives JFK assassination committee, link

 

AMAFCA (NM) Albuquerque Metropolitan Arroyo Flood Control Authority (AMAFCA)

 

From Waymarking:

SRTHUM (CA) Stephen R Thumlert PLS - Property Corner (cool disk)

KENROW (KY) Commonwealth of Kentucky - Right of Way

TENDOT (TN) Tennessee Department of Transportation

JACKCO (MI) Jackson County Remonumentation

USBoPR (US) Bureau of Public Roads [Type II]

USGSGS (US) U.S. Department of Interior Geological Survey - Cascades Volcano Observatory

TENVAA (TN) *Tennessee Valley Authority (square)

DT0353 (AZ) Boston Museum of Science

LOCORA (TX) Lower Colorado River Authority

DH5691 (WI) Juneau County

WISDOT (WI) Wisconsin Department of Transportation [Type V]

ARSINC (NY) American Rock Salt, Inc.

CAC??? (IL) CAC

ChiUTD (IL) (B)Chicago Urban Transit District

ToLALH (CA) Town of Los Altos Hills

OX0228 (US) U.S. Department of Agriculture Biological Survey

CoMOVI (CA) City of Mountain View

Edited by BuckBrooke

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here's the rest of it.

 

Waymarking:

VoSKOK (IL) **Village of Skokie

DuCM&P (IL) DuPage County Maps & Plats

VoGENE (NY) Village of Geneseo

CoMOVI (CA) City of Mountain View [Type II]

CoEUSA (US) Corps of Engineers U.S.A. - Boundary

RD4331 (OR) Oregon State Engineer

SCOCoW (CA) Siskiyou County - City of Weed

ROSINC (NC) The Rose Group, Inc.

LG1362 (NE) City of Bertrand

SFWDEP (CA) San Francisco Water Department [Type II]

BOCOLI (KY) **Boone County Line

CIoLOD (CA) City of Lodi

COMIHI (CO) State of Colorado - 2003 Mile High Marker, Denver

PU1560 (US) Bureau of Land Management - "Not a Survey Corner"

 

From Flickr:

MDDoNR (MD) Maryland Department of Natural Resources

One I can't read. Anyone?

Unidentified state local marker

Another unidentified state local marker

A third local

marker

UoFDCE (FL) University of Florida - Dept. of Civil Engineering

CoAUST (TX) City of Austin (cool disc)

COESSE (MA) Essex County Street Line

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Heres a disk I bet you dont have.

667_100.jpg

NZ1139

Had to share this one. <_<

 

Looks like a food can got caught in some cement.

That’s what I thought, but they logged it as a find.

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I think I can read its stamping, which was enough to find its datasheet. It is a new agency:

 

ZZ0000 ***********************************************************************

ZZ0000 DESIGNATION - GOOD

ZZ0000 PID - ZZ0000

ZZ0000 STATE/COUNTY- BFE/ILLUSIONARY

ZZ0000 USGS QUAD - MIDDLE OF NOWHERE (1975)

ZZ0000

ZZ0000 *CURRENT SURVEY CONTROL

ZZ0000

_____________________________________________________________

ZZ0000* NAD 83(1992)- 12 34 56.78910(N) 101 01 01.01010(W) ADJUSTED

ZZ0000* NAVD 88 - 9999.9 (meters) 9999.9 (feet) VERTCON

ZZ0000 ___________________________________________________________________

ZZ0000 LAPLACE CORR- 8.16 (seconds) DEFLEC99

ZZ0000 GEOID HEIGHT- -21.03 (meters) GEOID99

ZZ0000

ZZ0000 HORZ ORDER - FIFTH

ZZ0000

ZZ0000.The horizontal coordinates were established by GPS observations

ZZ0000.and adjusted by the National Geodetic Survey in December 1993.

ZZ0000

ZZ0000.The NAVD 88 height was computed by applying the VERTCON shift value to

ZZ0000.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)

ZZ0000

ZZ0000.The Laplace correction was computed from DEFLEC99 derived deflections.

ZZ0000

ZZ0000.The geoid height was determined by GEOID99.

ZZ0000

ZZ0000; North East Units Scale Converg.

ZZ0000;SPC NM C - 462,990.936 467,619.361 MT 0.99991292 -0 12 17.3

ZZ0000;UTM 13 - 3,893,576.274 353,800.789 MT 0.99986342 -0 55 30.2

ZZ0000

ZZ0000|---------------------------------------------------------------------|

ZZ0000| PID Reference Object Distance Geod. Az |

ZZ0000| dddmmss.s |

ZZ0000| QQ0001 BUD LIGHT CAN 10.218 METERS 07928 |

ZZ0000| QQ0002 BROKEN TV 10.278 METERS 19231 |

ZZ0000| QQ0003 NUDIE BAR SIGN APPROX. 1.0 KM 2133259.0 |

ZZ0000|---------------------------------------------------------------------|

ZZ0000

ZZ0000 SUPERSEDED SURVEY CONTROL

ZZ0000

ZZ0000 NAD 83(1992)- 12 34 56.78901(N) 101 01 01.01010(W) AD( ) 1

ZZ0000 NGVD 29 - 9999.9 (m) 9999.9 (f) GPS OBS

ZZ0000

ZZ0000.Superseded values are not recommended for survey control.

ZZ0000.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.

ZZ0000.See file dsdata.txt to determine how the superseded data were derived.

ZZ0000

ZZ0000_MARKER: Z = SEE DESCRIPTION

ZZ0000_SETTING: RC = ROUGH CONCRETE

FO1738_STAMPING: GOOD UNTIL 06/23/1990

FO1738_MARK LOGO: CHIOTS

ZZ0000_MAGNETIC: Y = MAGNETIC MATERIAL

ZZ0000_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY

ZZ0000_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR

ZZ0000+SATELLITE: SATELLITE OBSERVATIONS - 2006

ZZ0000

ZZ0000 HISTORY - Date Condition Recov. By

ZZ0000 HISTORY - 1991 MONUMENTED JONDOE

ZZ0000

ZZ0000 STATION DESCRIPTION

ZZ0000

ZZ0000''DESCRIBED BY JOHN DOE, INC. 1991

ZZ0000''THE STATION IS LOCATED ABOUT 7 MI (11.3 KM) NORTHEAST OF DOWNTOWN

ZZ0000''MIDDLE OF N. AND 1.25 MI (2.01 KM) WEST OF INTERSTATE 5641 ON MAIN

ZZ0000''STREET.

ZZ0000"

ZZ0000''TO REACH THE STATION FROM THE INTERSECTION OF SOMEWHERE ST. AND

ZZ0000''INTERSTATE 5641, GO WEST ON INTERSTATE 5641 1.25 MI (2.01 KM) TO THE

ZZ0000''STATION ON THE LEFT, ON THE SOUTH SIDEWALK OF THE EAST-BOUND TRAFFIC

ZZ0000''LANES, IN THE SOUTHWEST QUADRANT OF THE INTERSECTION.

ZZ0000''THE STATION MARK IS A RUSTED CHICKEN OF THE SEA SALMON STEEL CAN SET

ZZ0000''IN THE HORIZONTAL SURFACE OF THE SIDEWALK, STAMPED GOOD UNTIL 6/23/1990

ZZ0000''THE STATION IS ABOUT 20 M (65.6 FT) WEST OF THE CENTERLINE

ZZ0000''OF NORTH DIVERSION STREET, 0.6 M (2.0 FT) NORTH OF A CONCRETE

ZZ0000''TRAFFIC BARRIER, AND 0.6 M (2.0 FT) EAST FROM THE WEST EDGE OF THE

ZZ0000''BURNED OUT CHEVY SEDAN.

Edited by BuckBrooke

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Here's one monumented by Michigan State University that I didn't see in the list yet. There's no date stamped on it, but it appears to have been monumented this past summer during some roadwork on campus. In fact, a wooden stake next to the disk had "proposted monument" written on it.

 

closeup_MSU207.jpg

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I think I can read its stamping, which was enough to find its datasheet. It is a new agency:

 

ZZ0000''TO REACH THE STATION FROM THE INTERSECTION OF SOMEWHERE ST. AND

ZZ0000''INTERSTATE 5641, GO WEST ON INTERSTATE 5641 1.25 MI (2.01 KM) TO THE

ZZ0000''STATION ON THE LEFT, ON THE SOUTH SIDEWALK OF THE EAST-BOUND TRAFFIC

ZZ0000''LANES, IN THE SOUTHWEST QUADRANT OF THE INTERSECTION.

ZZ0000''THE STATION MARK IS A RUSTED CHICKEN OF THE SEA SALMON STEEL CAN SET

ZZ0000''IN THE HORIZONTAL SURFACE OF THE SIDEWALK, STAMPED GOOD UNTIL 6/23/1990

ZZ0000''THE STATION IS ABOUT 20 M (65.6 FT) WEST OF THE CENTERLINE

ZZ0000''OF NORTH DIVERSION STREET, 0.6 M (2.0 FT) NORTH OF A CONCRETE

ZZ0000''TRAFFIC BARRIER, AND 0.6 M (2.0 FT) EAST FROM THE WEST EDGE OF THE

ZZ0000''BURNED OUT CHEVY SEDAN.

Kudos. That's one of the funniest things I've read yet. I love it. :unsure: (Just change the two lines where you forgot to hange the PID) and that's a keeper. :anicute: [Edit: I want to update it! The Chevy Sedan is no longer present. New directions follow: APPROX 1.5 FEET WEST OF RUN-OVER ORANGE TRAFFIC CONE]

 

I have a USAF marker here somewhere. As soon as I can find the pic, I'll post it.

 

Me.

Edited by foxtrot_xray

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I was recently hinking and benchmarking on and near the NH/Qebec border as well as the Maine/Quebec border.

 

I recoverd an IBC station (QH0523) which was marked by an IBC disk I had not seen before. It was a standard sized disk (unlike the small 2 inch triangulations stations and bench mark disks I am used to seeing up there). It is mounted on the top of a cut off cast iron boundary monument. It looks like they kept repairing the thing and finally gave up, cut it off and mounted this tablet on the top of the stump. Only the disk is visible (with an outline of the old cast iron post).

 

Since it was right by some one's lawn, I didnt want to do any unneccessary digging to see the stump or original base. It's also a bit warped, but otherwise in good condition.

 

Here's a picture (sorry it's a little overexposed):

 

a89be9d9-880c-4489-903d-1b22980ad882.jpg

(Click for full size image)

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OK, I caught up on everyone's additions and emails submissions to me. There was one in another forum topic; I'm trying to track it down. Here are some additions:

 

SOCOTE (GA) Southern College of Technology

CoROSE (CA) City of Roseville

CofSUN (CA) City of Sunnyvale

MTSHDE (MT) Montana State Highway Department

GENECO (MI) Genesee County Remonumentation

JEFFCO (WI) Jefferson County

MZ2634(NY) Saratoga County Engineer

 

As a request, please look through agencies that I have listed, but that don't have photoes. If any are near you, would you mind going over to find them, and snap a photo? Many are found, many are not found.

Edited by BuckBrooke

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So, where's the official list to search for nearby ones to find for you?

 

 

Harry Dolphin; Scroll down the page at BuckBrooke's Master Agency List and you will find a section for discs that are recorded as found/recovered without photos and another section for discs that have not been found or recovered but indicate a unique disc somewhere in the discription.

 

BuckBrooke; I checked on the submissions update and the Lane County Surveyors disc (OR) carries the same designation as the Lane County Public Works disc right above it. It links to the correct photo though.

 

Thanks for the list and for your work in updating it.

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Ok, the list is up to date with changes.

 

Email submissions:

 

AB8642 (CA) *City of Anaheim

AB8641 (CA) *City of Anaheim [Type II]

 

My attention was pointed to a number of agencies I had missed in the Waymarking benchmark category:

CoLODI (CA) City of Lodi

GAGESU (GA) Georgia Geodetic Survey

ILLDoT (IL) Illinois Department of Transportation (rod)

KCODoT (IL) Kane County Division of Highways (rod)

DPCM&P (IL) DuPage County Maps & Plats

ILLWRE (IL) Illinois Water Resources

NYCMTA (NY) Metropolitan Transporation Authority

CofBER (NE) City of Bertrand (note that they stamped Bertrand on a standard City of _____ disk

NMH&TD (NM) New Mexico Highway & Transportation Department

GENVIL (NY) Geneseo Village

CLERCO (OH) Clermont County, variants: CLERCO

CWENCO (OR) Century West Engineering Corp.

SHHICO (OR) Shevlin Hixson Co.

 

 

Waymarking disks I haven't seen, and can't find after searching, but have been added to the agency list:

(US) Civilian Conservation Corps

(OH) Cincinnati Area Geographic Information System

(WI) Wisconsin County GPS Network

 

That brings the total to about 820

Edited by BuckBrooke

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Buckbrooke

 

I just looked at your master list, and was impressed to see that you already had a disk that I logged on 9/18/06. (AE6516) Although it is a cadastral disk, marking a corner of the Appalachian National Scenic Trail Exterior Corridor Boundary, it was subsequently used by the VT Agency of Transportation for control on a bridge project just down the road. That's how it got into the NSRS (National Spatial Reference System).

 

There are literally thousands of these disks along the 2100+ mile length of the AT. I am personally responsible for the placing of several hundred of them here in Vermont. I would be interested to know if any others have found their way into the NSRS.

 

For further database info, the government agency that contracted these surveys is the US Department of the Interior, National Park Service.

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Holtie22,

I'm reasonably involved with the AT disks on the corridors. I'm working with Sally Naser to make a useful online database; we started discussions just as my old dissertation topic fell through this spring; I've settled personal matters, and will be getting going on it soon. Send me an email.

My impression is that only a handful of the AT disks are in the NGS database; text searching through the appropriate state PID text files found 2 or 3, as I recall when I was going through the databases this spring.

 

Cheers,

Buckner

Edited by BuckBrooke

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I recovered a couple of state boundary line monuments over Columbus weekend.

 

Vermont-New Hampshire Reference Monument No. 84, This is non-NGS, but I put up the photo with QH0734 "BOUNDARY REF MON 86" which is just down the road. No. 84 is in better shape so the picture is a better one to use.

 

8c64fd6a-dff4-4d36-9b5e-73820871068e.jpg

 

Maine-New Hampshire Boundary Monumewnt No. 118. This is also non-NGS but I put the photo with a nearby station (which I didn't find) QH0543 "RUMP IBC". The boundary monument was on the west slope of Rump Mountain (on the summit of which the IBC station was supposed to be). I believe there are some ME-NH monuments in the NGS database, further south. The initials "ATF" appear at the bottom right - anyone know what they might stand for?

 

c2910fb9-a7c8-40a7-9be0-d01f1069574a.jpg

 

[Edit: I found an NGS ME-NH marker - PF0498. "ATF' seems to be on all of them. It may be the agency that set the marks.]

Edited by Papa-Bear-NYC

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I've made these changes. Here are a few more from the gallery, Waymarking, Flickr and email submissions.

 

PENNSU (PA) Pennsylvania State University

COLDNR (CO) Colorado Department of Natural Resources - Mined Land Reclamation Division

KYDIVW(KY) Kentucky Division of Water

DoCBPR (US) U.S. Department of Commerce Bureau of Public Roads

AB4130 (KS) Kansas Nebraska Initial Point

MD_DNR(MD) Maryland Department of Natural Resources

NYSUDC (NY) New York State Urban Development Corporation

KU3315(US) U.S. Coast & Geodetic Survey - oldest

BC0394 (US) **US Air Force - GSS

HS0403 (CA) *East Bay Municipal Utility District [Type II]

FX0147 (VA) City of Norfolk - Zero Mile Stone

HT3576 (CA) Santa Cruz County Surveyor

AC6024 (US) Corps of Engineers - U.S. Army - Duluth, Minnesota office

UNKNOW (TX) **WT U CO

NE0812 (MI) Unknown - Probably Grand Trunk Western Railroad

MC1504 (OH) (:unsure: Department of... Toledo

LX2482 (US) U.S. Coast and Geodetic Survey and State Survey - Connecticut

 

Cheers,

Buck

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I've made these changes. Here are a few more from the gallery, Waymarking, Flickr and email submissions.

 

...

UNKNOW (TX) **WT U CO

...

Cheers,

Buck

 

Hi Buck,

 

Being the one who took the photo, I have no idea what the marker is for. It may not even be a survey marker. I'm still trying to research it. I haven't had time to contact the company (WTU). The location is San Angelo, TX and WTU is West Texas Utilities Company.

 

Kent

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Definitely not NGS, and it looks more like a washer held in place by a rivet, but we saw it on the sidewalk, so we took the picture. :D About 34th Street and Third Avenue, NYC. Triborough Bridge and Tunnel Authority benchmark.

553f2306-593c-49d1-832d-762a5ee1d01e.jpg

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Here is one we found while visiting Walnut Canyon Nat'l Monument. It is Not in the NGS database.

 

Don't have a clue what an ARCHAEOLOGICAL DATUM is!

 

John

It's probably something like WGS 1984 BC. :laughing:

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Here is one we found while visiting Walnut Canyon Nat'l Monument. It is Not in the NGS database.

 

Don't have a clue what an ARCHAEOLOGICAL DATUM is!

 

John

It's probably something like WGS 1984 BC. :laughing:

 

 

Can't say, we're not THAT old!

 

Just oldfarts. :wub:

 

John

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Ok, I've updated the above submissions. Here are a few more, gleaned from the usual sources. Also, a dozen corrections/improved photos/rearrangements to the list.

 

As usual, the largest number found are in California. Are there more people getting out and hiking there? Anyways, I've noticed that a fair number of the MN counties seem to have their own disks. Anybody from MN, could you verify this, and maybe supply a few more photos?

 

From Waymarking:

MWHASS (NJ) Michael W. Hyland Associates

CoLOMP (CA) City of Lompoc

CumbeI (CA) Cumberland Island

FisAss (NY) Fisher Associates

IDDoPW (ID) Idaho Department of Public Works - Right of Way [Type II]

CinCWW (OH) Cincinnati Water Works

HIPONC (NC) High Point

SJRWMD (GA) St. John's River Water Management District

PATCVC (PA) Pennsylvania Turnpike Commission - Vertical Control

LEXICO (SC) Lexington County

MONTCO (CA) Monterey County

USNUGP (US) US Navy - US Government Property

OKDoTR (OK) Oklahoma Department of Transportation [Type II]

TOWINC (CA) Towhill, Inc. - Concord, CA

CoFOPK (OH) City of Forest Park

GADoNR (GA) Georgia Department of Natural Resources

CofMoB (CA) City of Morro Bay

 

From forum discussions:

WIH&ST (FL) Williams, Hatfield and Stoner

FPOCOC (IL) F.P.O. (F.P.D.?) Cook County

 

From the Photo Gallery:

AB5844 (MN) Crow Wing County

DD4592 (SC) South Carolina Coastal Council [Type III] (cool disk)

DC1876(CA) State of California Department of Highways

MC1097 (US) National Geodetic Survey - Reference station [Type II]

RO0841 (MN) Minnesota State Highway Department - Azimuth station

DX4669 (CA) Orange County Surveyor [Type II]

DX4667 (CA) Orange County Surveyor - Reference station

QP0094 (US) Missouri River Commission [Type III]

QP1899 (MN) Minnesota Dept. of Transportation - Reference Station

Edited by BuckBrooke

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Here's one I found yesterday I haven't seen before. It's a reference mark set by Westerchester Co. Control Survey, and arm of Westchester County NY. It was set in the 1930s on the Palisades for station KU4051. It's unstamped.

 

0b2e962d-a7e8-4c0c-80be-b8694297e151.jpg

Edited by Papa-Bear-NYC

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Hi,

My sons and I started geocaching only a few weeks ago. However, while reviewing video / pictures from one of our camping / ghosttown trips this last summer, we found the attached picture. I assume it is a benchmark of some kind. We took this picture at the top of the Happy Jack Chalk Mine near Scotia NE. I thought you might find it interesting. If you know any more about this particular item, we would be interested to learn. I have also included a picture of the view from the peak (2000 feet is high for Nebraska), above the chalk mine (north loup river).

 

Since I could not figure out how to upload pictures, please see them at my yahoo photos:

 

http://photos.yahoo.com/sorensenteach

 

they are in the happyjack album.

 

sorensenclan

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74412cf9-154e-431c-a916-f001c936429c.jpg

State of New Jersey Department of Environmental Protection Green Acres

Actually I was looking for LY0802, and I saw a post with tape labeled Monument #1, and dug in the snow.

N 41 10.143 W 74 47.531

Edited by Harry Dolphin

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I haven't been able to find a PID or waymark for it, but I found a really interesting Smitsonian Institution benchmark disk w/o a GPSr on the Mall in DC.

Edited by gamecockfan1

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AA6876

 

City Of Kent(OH) has a series of these which includes 42 disks. The FR and BR prefixes stand for the original townships, Franklin and Brimfield, parts of which have been incorporated into Kent. Kent is in Portage County about 10 miles east of Akron.

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Thanks, everybody; I'll try to put them in this weekend. I'm not spending as much time on benchmarking as I used to, as I got a fellowship to finish my dissertation and am commuting 160 miles/day (80 each way). Kind of takes the fun out of driving on the weekends. Also, my days are longer.

 

As a fun note, I'm making images of bipolar jet flows coming out of evolved stars. Tip to tip on the lobes of the stars is 350 milli-arcseconds with pixel size of at worst 100 micro-arcseconds. I should be able to measure parallaxes in the next year of 50 uas with 5 sigma accuracay (all the way across the galaxy).

Edited by BuckBrooke

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