To set a relative scale of 1:24000 in Surfer, see the steps below.

- In the
**Contents**window, click the*Map*. - In the
**Properties**window, click the**Scale**tab. - 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:

- Calculate the corresponding value for your map units (see below).
- Select
*Map*in the**Object Manager**. - In the
**Property Manager**, click the**Scale**tab. - 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 13, 2018*

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