I would like to know how to calculate the grid convergence angle between True North and Grid North for UTM maps.
I am using ArcGIS 10.0 (ArcView licence) and have used the Calculate Grid Convergence Angle tool from the Cartography toolbox; however, I would like to know how to calculate this angle myself (using Excel) to compare against the ArcGIS result.
Also, is there a standalone program or script that could be shared?
أكثر...
I am using ArcGIS 10.0 (ArcView licence) and have used the Calculate Grid Convergence Angle tool from the Cartography toolbox; however, I would like to know how to calculate this angle myself (using Excel) to compare against the ArcGIS result.
Also, is there a standalone program or script that could be shared?
أكثر...