Olney Base Line (1879)

The Olney Base Line in Jasper County, Illinois, was measured by the Army Corps of Engineers for the U. S. Lake Survey between July 9 and September 15, 1879. Since it was located near the 39th parallel and had been accurately measured, the CGS incorporated the base line into the Transcontinental Triangulation.

The length of the base line, reduced to sea level, was 6,590.7804 meters, +/- 8.9 mm.

See also: [:TranscontinentalTriangulation:transcontinental triangulation], [:IndianaSeries:Indiana series], [:IllinoisSeries:Illinois series]


ImageLink(http://www.holoscenes.com/images/bmwiki/arc/NavWest562.png,IllinoisSeries,width=16,height=562,alt=Illinois series) http:/images/bmwiki/arc/olney.jpg ImageLink(http://www.holoscenes.com/images/bmwiki/arc/NavEast562.png,IndianaSeries,width=16,height=562,alt=Indiana series)

No.

Station

PID

Monumented

Destroyed

Designation

1

East Base (1879)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JB1613 JB1613]

1879

OLNEY EAST BASE USLS 1879

2

Middle Base (1879)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JB1612 JB1612]

1879

OLNEY MIDDLE BASE USLS 1879

3

West Base (1879)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JB1616 JB1616]

1879

OLNEY WEST BASE USLS 1879

4

Buffalo Mound (1879)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JB1611 JB1611]

1879

BUFFALO MOUND USLS 1879

5

Check Base (1879)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JB1614 JB1614]

1965

OLNEY CHECK BASE RESET

6

Onion Hill (1879)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JB1618 JB1618]

1879

ONION HILL USLS 1879

7

Claremont (1879)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JA2115 JA2115]

1879

CLAREMONT RESET

8

Denver (1879)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JB1617 JB1617]

1883

DENVER

9

Newton (1883)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JB1619 JB1619]

1883

NEWTON 1883

10

Hunt City (1879)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=KB1193 KB1193]

1879

HUNT CITY

11

Oblong (1879)

[http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=JA2116 JA2116]

1879

OBLONG USLS 1879