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the Degree Confluence Project
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United States : Maryland

1.3 miles (2.0 km) NW of Langley Park (Prince George's), Montgomery, MD, USA
Approx. altitude: 72 m (236 ft)
([?] maps: Google MapQuest OpenStreeMap topo aerial ConfluenceNavigator)
Antipode: 39°S 103°E

Accuracy: 10 m (32 ft)
Quality: good

Click on any of the images for the full-sized picture.

#2: View East #3: View South #4: View West.  (The point lies just past this wall) #5: My GPS receiver’s display at my closest point #6: 'Half zeros’: 39 Degrees North; 27 feet short of 77 Degrees West #7: The Long Branch Library, very near the point.  (I’m not sure why the flags were at half-mast.)

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  39°N 77°W (visit #22)  

#1: The confluence point lies just inside the building on the left side of this image.  (This is also a view to the North)

(visited by Ross Finlayson)

09-Aug-2022 -- I first visited this point more than 22 years ago, in November, 1999. This was only my fourth Degree Confluence Point, and my first outside California. At the time, Selective Availability was in force. Because of this, I couldn’t be sure exactly how close I was to the point; only that I was somewhere within 100m.

22 years later, Selective Availability is a distant memory, consumer GPS receivers have become more accurate, digital cameras have improved significantly, and excellent satellite imagery lets us preview the location of any point. We now know that the point lies just within one of the buildings in the Flower Branch apartment complex. By standing next to a wall, I was able to get within 27 feet (+/- GPS error of 6 feet) of the point.


 All pictures
#1: The confluence point lies just inside the building on the left side of this image. (This is also a view to the North)
#2: View East
#3: View South
#4: View West. (The point lies just past this wall)
#5: My GPS receiver’s display at my closest point
#6: 'Half zeros’: 39 Degrees North; 27 feet short of 77 Degrees West
#7: The Long Branch Library, very near the point. (I’m not sure why the flags were at half-mast.)
ALL: All pictures on one page