Using GEO codes

Hi Experts,

I got a requirement related to GEO codes i.e. maps location latitude & logitude.

I have geo codes for some location or can be say as like geo codes of diagonal points of square. My requirement is to increase the area around square by approx 500 mtrs and find the codes of that new points top left and bottom right corners.

Any idea how can I achieve this in ABAP.