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Datum, Ellipsoid, Rhumb Line, Secant, Spheroid, Tangent and other useful terms in Map Projection

Datum A reference for position on the surface of the Earth. In surveying, a datum is a reference system for computing or correlating the results of surveys. There are two principal types of datums: vertical and horizontal. A vertical datum is a level surface to which heights are referred. In the United States, the generally adopted…

Surf City beachfill project one step closer

The Town of Surf City (NC) is finally moving forward with the next step in their long-awaited beach nourishment project.

Carlyle Lake Increasing Downstream Releases

Effingham, IL / Effingham Radio Feb 1, 2021 1:33 PM Carlyle Lake, IL -(Effingham Radio)- As of 1:00 p.m. on Monday,1 February 2021 the pool elevation at Carlyle Lake was 444.58 feet, referenced to the National Geodetic Vertical Datum (NGVD). The current release rate is approximately 3,750 cubic feet per second (cfs). The inflow for Sunday, 31 January 2021 was approximately 10,260 day second feet (dsf). With current precipitation on the ground, Carlyle Lake is forecasted to crest at 445.5 feet NGVD on Wednesday, 3 February 2021. Releases will be increased to 6,000 cfs by Friday, 5 February 2021.      The Corps of Engineers continues to work closely with their partners, the Carlyle Lake Association, Mid-Kaskaskia River Association and the Okaw River Basin Coalition to monitor the situation. For more information, contact the Carlyle Lake Project Office at (618) 594-2484 or email at carlylelake@usace.army.mil

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