The Eastern Shore Series of the Transcontinental Triangulation (1896-1897)

The Eastern series connected the Cape May lighthouse and the Kent Island base line network. It incorporated several stations that had been observed in the 1840's during the coastal surveys of Bache and Hassler, but most of the older triangulation work needed to be improved. This fell upon F. W. Perkins, Assistant Coast and Geodetic Survey, who completed the work in 1896 and 1897. One third of the 87-mile network was over water, and two-thirds on mostly flat, low land. The low topological relief of the area required the construction of tall towers upon which to mount the equipment. At six stations, the observing towers were 120 foot tall, and some of the target signals were 260 feet tall.

ImageLink(http://www.photolib.noaa.gov/historic/c&gs/thumbs/theb2462.jpg,http://www.photolib.noaa.gov/historic/c&gs/theb2462.htm) Still Pond signal. (NOAA photo library image)

Also see: [:TranscontinentalTriangulation:transcontinental triangulation], [:KentIslandBaseLine:Kent Island base line]


[http:/images/bmwiki/arc/eastern_series.jpg]

No.

Name

PID

Monumented

Destroyed

Designation

1

Finlay (1844)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JV5442 JV5442]

1844

Y

FINLAY 1844

2

Linstid (1848)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JV5231 JV5231]

1844

LINSTID RESET

3

Osbornes Ruin (1844)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JV5309 JV5309]

1844

Y

OSBORNES RUIN 1844

4

Pooles Island (1848)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JV5354 JV5354]

1844

POOLES ISLAND 1844

5

Clough (1896)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JV5107 JV5107]

1896

CLOUGH RESET

6

Turkey Point (1845)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JV4850 JV4850]

1896

TURKEY POINT RESET

7

Still Pond (1896)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JV0262 JV0262]

1896

STILL POND

8

Hope (1896)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JU3484 JU3484]

1897

HOPE RESET

9

Barclay (1897)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JU3483 JU3483]

1932

BARCLAY RESET

10

Hartly (1896)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JU3464 JU3464]

1896

HARTLY RESET

11

Kent (1896)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HU0853 HU0853]

1896

KENT RESET

12

Mahon (1896)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JU3385 JU3385]

1896

MAHON 1896

13

Stone (1896)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JU3377 JU3377]

1896

Y

STONE 1896

14

Egg Island Lighthouse (1896)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JU3369 JU3369]

1896

Y

EGG ISLAND LIGHTHOUSE

15

Brandywine Shoal Lighthouse (1896)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HU1314 HU1314]

1877

BRANDYWINE SHOAL LIGHTHOUSE

16

Cape Henlopen Lighthouse (1896)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HU1332 HU1332]

1841

CAPE HENLOPEN LIGHTHOUSE

17

Cape May Lighthouse (1896)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HU1293 HU1293]

1859

CAPE MAY LIGHTHOUSE