This tool allows you to convert between geographic coordinates and projected planar coordinates using various projection algorithms and geodetic datums.

Input Format:

Enter coordinates with values separated by commas, one pair per line:

• For geographic coordinates (LB): Longitude,Latitude (in degrees)
• For projected coordinates (XY): X,Y (in meters)

Supported Projections:

• Mercator (merc): Cylindrical map projection
• Transverse Mercator (tmerc): Including Gauss-Krüger
• Universal Transverse Mercator (utm): Global grid system
• Web Mercator (webmerc): Used by most online maps
• Lambert Conformal Conic (lcc): Conical projection
• Lambert Equal Area (leac): Azimuthal equal-area
• Albers Equal Area (aea): Conical equal-area

Supported Ellipsoids:

Multiple earth ellipsoid models are supported, including WGS84, Beijing 1954, Xian 1980, and custom definitions.