Tool:Converting Degree Minutes (DM) to Decimal Degrees (DD) using python script
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14 days ago
import csv
import sys

def dm_to_dd(degrees, minutes):
    """
    Convert Degree Minutes (DM) to Decimal Degrees (DD).

    Parameters:
    degrees (int): Degrees part of the angle.
    minutes (float): Minutes part of the angle.

    Returns:
    float: Decimal degrees representation of the angle.
    """
    return degrees + (minutes / 60)

def convert_dm_to_dd(input_file, output_file):
    """
    Convert Degree Minutes (DM) in a CSV file to Decimal Degrees (DD) and write to another CSV file.

    Parameters:
    input_file (str): Path to the input CSV file.
    output_file (str): Path to the output CSV file.
    """
    with open(input_file, 'r') as infile, open(output_file, 'w', newline='') as outfile:
        reader = csv.reader(infile)  # Default delimiter is comma
        writer = csv.writer(outfile)

        # Write header to output file
        header = next(reader)
        writer.writerow(header + ['Decimal Latitude', 'Decimal Longitude'])

        # Convert each row and write to output file
        for row in reader:
            # Latitude conversion
            lat_degrees, lat_minutes = map(float, row[0].split('°'))
            lat_decimal = dm_to_dd(lat_degrees, lat_minutes)

            # Longitude conversion
            lon_degrees, lon_minutes = map(float, row[1].split('°'))
            lon_decimal = dm_to_dd(lon_degrees, lon_minutes)

            # Write the original data along with the decimal values
            writer.writerow(row + [lat_decimal, lon_decimal])

if __name__ == "__main__":
    if len(sys.argv) != 3:
        print("Usage: python converter.py input.csv output.csv")
        sys.exit(1)

    input_file = sys.argv[1]
    output_file = sys.argv[2]

    convert_dm_to_dd(input_file, output_file)
    print(f"Conversion completed. Results written to {output_file}.")

Usage:

 python converter.py "C:\Users\Desktop\5555.csv" Demo_convert.csv
Minutes Decimal offtopic Degrees python • 334 views
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1
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this is not bioinformatics and is not a tool and as such it is off-topic on this site

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Instead of simply posting a chunk of code it would be useful to add a line or two to say where this could would be useful. Not immediately apparent as to what area of bioinformatics this is applicable to.

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Entering edit mode

Hello friends,

Thank you for your feedback. I understand that the post may not directly relate to bioinformatics. My aim was to share a useful script for converting Degree Minutes (DM) to Decimal Degrees (DD), which can be relevant in geospatial analysis of biological data. I appreciate your guidance and will ensure future posts align better with the forum's focus.

Best regards, KAMALAKKANNAN R

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