In cartography, what is another term for the convergence angle?

In cartography, the convergence angle, sometimes referred to as the gamma angle, is key in understanding how the meridians of longitude converge as they approach the poles. This angle is essential for accurately representing the curvature of the Earth on maps and for making the necessary adjustments in land surveying and navigation that involve angular measurements.

The gamma angle specifically describes the angular difference between the direction of true north and the north as represented on a particular projection. This distinction is crucial when mapping or navigating over large areas where the curvature of the Earth can significantly impact the accuracy of data represented on flat maps.

Understanding the concept of convergence and its associated angles is vital for ensuring accurate geographic representations, particularly in regions that are not aligned with the global grid. Thus, recognizing gamma angle as another term for convergence angle highlights its importance in cartographic practices.