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How do I specify a relative scale of 1:24000 in Surfer?

To set a relative scale of 1:24000 in Surfer, see the steps below.
  1. In the Contents window, click the Map.
  2. In the Properties window, click the Scale tab.
  3. In the Scaling ratio (1:N) field, enter the desired scaling factor in map units (24000 in this example).
 
If you are using Surfer 13 or previous, you'll need to calculate the values to use:
 
What to enter for the scale entirely depends on what your map X and Y units are. You will need to calculate the scale, and then enter it for the map:
  1. Calculate the corresponding value for your map units (see below).
  2. Select Map in the Object Manager.
  3. In the Property Manager, click the Scale tab.
  4. Enter the calculated X or Y scale value. For example, if you wanted 1:24000 and your map is in feet, you would enter 2000 to the right of Map units per in. for your X or Y scale.


Example Calculations:

  • If your map is in units of feet, then a scale of 1:24000 is calculated as follows:
    1:24000
    1 inch = 24000 inches
    1 inch = 2000 feet

  • If your map is in units of meters, then a scale of 1:24000 is calculated as follows:
    1:24000
    1 inch = 24000 inches
    1 inch = 60960 centimeters
    1 inch = 609.60 meters

  • If your map is in units of lat/long, then a scale of 1:24000 is calculated as follows:
    1° of latitude is about 68.703 miles or 4353022 inches.
    1 inch = 24000 inches
    1 inch = 0.0055° latitude (Y Scale)

    1 degree of longitude is 69.172 miles * cos(latitude). This is the same as 4382737.92 inches * cos(latitude). So find the latitude of the center of your map and insert it in the equation to find how much 1° of longitude is for your map. So if your central latitude value is 39.5°:

    1° longitude is 4382737.92 inches * cos (39.5)
    1° longitude is 3381828 inches.
    1 inch = 24000 inches
    1 inch = 0.007097° longitude (X Scale)

Updated February 5, 2017

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