Longitude,Latitude to X,Y

Use the Gravity > Locations > Longitude,Latitude -> X,Y menu option (GRLL2XY GX) to convert longitude/latitude coordinates to X/Y coordinates on a projected map or local coordinate system.

Longitude,Latitude ->  X,Y dialog options

Conversion method

Select the Projected coordinate system method to use a map projection. Select the Local coordinate system method to use origin and azimuth. Script Parameter: GRLL2XY.METHOD

Application Notes

This procedure is useful if you have data points with known longitude and latitude coordinates, and you would like to work on a map/local X, Y coordinates.

For the "Projected" method, the X, Y coordinates are calculated based on a projected map coordinate system by running NEWXY GX.

For the "Local" method, the X, Y coordinates are calculated by projecting longitude/latitude coordinates to a Transverse Mercator projection with a central meridian through the specified local (X, Y) and then rotating to the required Y azimuth by running LL2XY GX. A local coordinate system is an arbitrary Cartesian coordinate system that has been located and oriented for the purposes of a particular study.