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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.
 
If you are using Surfer 13 or previous, you must specify the map scale in Map units per in. or Map units per cm. depending on your page units. Therefore, 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 and your page units are inches, then a scale of 1:24000 is calculated as follows:
    1 inch : 24000 inches
    24000 inches = 2000 feet
    Map units per in. = 2000
  • If your map is in units of meters and your page units are inches, then a scale of 1:24000 is calculated as follows:
    1 inch : 24000 inches 
    24000 inches = 60960 centimeters
    60960 centimeters = 609.60 meters
    Map units per in. = 609.60

  • If your map is in units of meters and your page units are centimeters, then a scale of 1:24000 is calculated as follows:
    1 centimeters : 24000 centimeters
    24000 centimeters = 240 meters
    Map units per cm. = 240
  • 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
    24000 inches = 0.0055° latitude (Y Scale)
    Map units per in. = 0.0055 in the Y Scale section

    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. For example, if your central latitude value is 39.5°:

    1 inch : 24000 inches

    1° longitude @ 39.5° N = 4382737.92 inches * cos (39.5) = 3381828 inches. 
    24000 inches = 0.007097° longitude (X Scale)
    Map units per in. = 0.007097 in the X Scale section

 

Updated November 2, 2017

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