Do you have any questions about how to really read a topo map?
Here's the best all-around info I've found, and thought I would share.
http://www.ghosttowns.com/topotmaps.html
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Oh ya, ya might want to use this too. Convert from decimal to deg, min., sec.
Here's How:
The whole units of degrees will remain the same (i.e. in 121.135° longitude, start with 121°).
Multiply the decimal by 60 (i.e. .135 * 60 = 8.1).
The whole number becomes the minutes (8').
Take the remaining decimal and multiply by 60. (i.e. .1 * 60 = 6).
The resulting number becomes the seconds (6"). Seconds can remain as a decimal.
Take your three sets of numbers and put them together, using the symbols for degrees (°), minutes (‘), and seconds (") (i.e. 121°8'6" longitude)
Replies
http://en.wikipedia.org/wiki/Magnetic_north
Here's how to get that.
http://www.ngdc.noaa.gov/geomagmodels/Declination.jsp
Here's How:
The whole units of degrees will remain the same (i.e. in 121.135° longitude, start with 121°).
Multiply the decimal by 60 (i.e. .135 * 60 = 8.1).
The whole number becomes the minutes (8').
Take the remaining decimal and multiply by 60. (i.e. .1 * 60 = 6).
The resulting number becomes the seconds (6"). Seconds can remain as a decimal.
Take your three sets of numbers and put them together, using the symbols for degrees (°), minutes (‘), and seconds (") (i.e. 121°8'6" longitude)