Can Surfer convert Degrees Minutes Seconds to Decimal Degrees?

Latitude and longitude coordinates are often presented in degree minute second (DMS) format, such as 39° 45' 30" (39 degrees, 45 minutes, 30 seconds). However, Surfer can only plot lat/long data when it is decimal degrees format (39.75833°). This should not be confused with displaying lat/long data in DMS format. Surfer can create a map from raw data in decimal degrees, and then you can change the display of the labels on the map to DMS format (How can I format my lat/long labels in Surfer in degrees/minutes/seconds?). 
To convert from DMS to decimal degrees (DD):
  1.  Click File | Open.
  2. In the Open dialog, select your data file and click Open.
  3. Click Data | Coordinate System | DMS to DD.
  4. In the DMS to DD dialog, 
    1. In the Source Columns section, choose the appropriate longitude column from the Longitude dropdown list and choose the appropriate latitude column from the Latitude dropdown list. 
    2. Choose the formatting of your lat/long columns from the DMS format dropdown list.
    3. In the Target Columns section, choose the desired output columns for the decimal degrees values to be written to. By default these are set to the first two empty columns in the worksheet.
    4. Click OK to create two new columns with the decimal degrees lat/long values.


Once your coordinates are in decimal degrees, you can use the data in Surfer. If you would like the Map axes to display in DMS format use the instructions in the above article. 

If you have Surfer 13 or earlier, you can use the steps in this article to convert your data: Can Surfer 13 And Older Convert Degrees Minutes Seconds To Decimal Degrees?


Updated October 25, 2018

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