INTRODUCTION The purpose of AGeoP-21 is to establish the U.S. Department of Defense World Geodetic System 1984 (WGS 84) as the standard geodetic system for geospatial information used by NATO. The document also defines how datums@ coordinates@ projections@ grids and position reporting are to be applied to geospatial information and used by NATO. Participating nations agree to: 1. Use geodetic datums@ coordinate systems@ projections@ grids@ area and position reporting systems@ and datum transformation methods in the manner specified by this AGeoP for the production@ exchange and use of geospatial information by and for NATO; 2. Reduce the number of regional datums and coordinate systems@ whenever possible@ during revision or recompilation of maps@ charts@ geodetic data and products for NATO.