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- How about this for a easy method of Grid Square Calculator?
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-
- With all this talk about grids - and getting computers to
- figure them etc. Here is an easy way - and you dont need
- no computers or anything - well maybe a peice of paper.
-
- Here's the deal:
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- How to determine you grid square without a map.
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- You will need your longitude and latitude to the nearest degree.
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- Frist your longitude:
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- 1. Convert the minutes portion of the longitude from minutes to
- decimal by dividing by 60.
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- 2. For North America and locations of West longitude, subtract
- your longitude from 180 degrees. For location of East
- longitude, add 180 degrees.
-
- 3. Next divide this value by 20. The whole number result will be
- used to determine the first character fo your grid, as follows:
- 0=A, 1=B, 2=C, 3=D, 4=E, 5=F, 6=G, 7=H, 8=I, 9=J, 10=K,
- 11=L, 12=M, 13=N, 14=O, 15=P, 16=Q, 17=R, 18=S.
-
- 4. For the third digit, multiply this last number by 10.
- The digit immediately before the decimal point is the third
- digit of your grid.
-
- Now use your latitude.
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- 1. If your latitude is north, add 90. If your latitude is South,
- subtract your latitude from 90.
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- 2. Divide this number by 10. The whole number result will be
- used to determine the second character of your grid as follows:
- 0=A, 1=B, 2=C, 3=D, 4=E, 5=F, 6=G, 7=H, 8=I, 9=J, 10=K,
- 11=L, 12=M, 13=N, 14=0, 15=P, 16=Q, 17=R, 18=S.
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- 3. Now, multiply this number by 10. The digit immediately before
- before the decimal point is the fourth digit of your grid.
-
- --
-
- George Fremin III
- Austin, Texas C.K.U.
- WB5VZL
- 512/416-0140
- geoiii@bga.com
-