This is a simple set of coordinates conversion system, contains eight conversion mode:
1.Two straight lines find intersection coordinates
2. The aliquots point of the original curve
3. Find Vertical
4. Polar coordinates from the point of view(A2I DIS)
5. Polar coordinates from the point of view(N and E)
6. The known XY two points find c coordinates(1 N and E)
7. The known XY two points find c coordinates(2 DIS)
8. The known 1,2 seek the intersection of A