PJConverter app for iPhone and iPad

A projected coordinate system is defined on a flat, two-dimensional surface. Unlike a geographic coordinate system, a projected coordinate system has constant lengths, angles, and areas across the two dimensions. A projected coordinate system is always based on a geographic coordinate system that is based on a sphere or spheroid.
Geographic Projection Coordinate Convert Tool is used to convert coordinate between two projected coodinate systems. Thousands of common projected coordinate systems are built in app. Whats more, all projection parameters can be user-defined.

The tool has following feature:
1. Thousands of geographic coordinate system and projected coordinate systems are built-in.
2. It support user-defined projection parameters, reference ellipsoid and geodetic datum.
3. Preview the profile world map under the any projection.
4. It is supported to select position in map view.
5. Projected coordinate system can be added to favorites.
6. Support searching coordinate system with key words.
7. User manual support.