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Converting coordinates from Degrees/Minutes/Seconds to Decimal Degrees in MapInfo Pro

Products affected: MapInfo Pro™
MapInfo Pro ships with a tool called Degree Converter that can  convert between Degrees/Minutes/Seconds to Decimal Degrees and vice-versa.
 

Tool Description

This tool converts a column of data containing DMS coordinates to Decimal Decimals and Decimal Degrees to degrees/minutes/seconds. The Degree Converter tool is part of the toolset that ships with MapInfo Pro. It converts coordinate information to decimal degrees from a degrees, minutes, seconds (d/m/s) format. It can also convert the columns back to degrees, minutes, seconds from decimal degrees.

Note: Users can also use the Degree Converter to convert decimal degrees back to degrees, minutes, seconds format. Use this feature if the data must return to its original format.

Converting Degree/Minute/Second Coordinates into Decimal Degrees

The Degree Converter tool is part of the toolset that ships with MapInfo Pro. It converts coordinate information to decimal degrees from a degrees, minutes, seconds (d/m/s) format. It can also convert the columns back to degrees, minutes, seconds from decimal degrees.

Before using this program, make sure that there are two new columns available to hold the converted data. You can also use the Degree Converter to convert a single Latitude/Longitude coordinate to either decimal degrees or D/M/S. You can also run this program with the Run Program command, as well as any of the other tools in the Tools Manager.

If entering map coordinates in degrees, users must enter decimal degrees as opposed to degrees/minutes/seconds. For example, to specify the coordinates 40 degrees, 30 minutes, enter 40.5 degrees.

MapInfo Pro includes a MapBasic application, DMSCNVRT.MBX, which converts d/m/s coordinates into decimal degrees.

To convert degrees, minutes, seconds coordinates to decimal degree coordinates:

  1. Run the Degree Converter tool to display the Decimal / Degree Converter (Version 1.3) window. See Running a Tool for details.
  2. Select the table containing the columns for conversion.
  3. Choose one of the columns containing the coordinate information. You have to run the program once for the longitude (X) column and once for the latitude (Y) column.
  4. Enter the DMS Separator. Users should be able to look at their table and identify the character separating the degrees, minutes, and seconds entries.
  5. Choose the column for the converted results and click OK.
  6. Browse the table to see the new column of coordinate information in decimal degrees. Repeat this procedure for the other coordinate column. Users are ready to use the SPATIAL menu to click the Create Points command.
Note: Pro users can also use the Degree Converter to convert decimal degrees back to degrees, minutes, seconds format. Use this feature if users must return the data to its original format.
Also, it is important that Minutes values greater than 60 will cause the process to fail.
UPDATED:  September 7, 2018