ATP-3-09-02 Field Artillery Survey Download
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Conversion and Transformation 16 February 2016 ATP 3-09.02 10-3 CONVERSION OF UTM COORDINATES TO GEO COORDINATES COMPUTATION 10-10. The FOS program converts UTM coordinates to geographic coordinates. The survey control point file can be accessed from this calculation. See TB 11-7021-228-10-1, for step-by-step procedures. SECTION II – ZONE-TO-ZONE TRANSFORMATIONS 10-11. The FOS program also creates a record for zone-to-zone transformation, transforms UTM grid coordinates and azimuth from one grid zone into terms of and adjacent grid zone. The survey control point file can be accessed from this calculation. See TB 11-7021-228-10-1, for step-by-step procedures. SECTION III – DATUM-TO-DATUM TRANSFORMATIONS 10-12. A datum is a point, a line, or surface used as a reference in surveying and mapping. A datum (geodetic) is a mathematical model of the earth used to calculate the coordinates on any map (JP 2-03). 10-13. The main problem warfighters face is that many countries use their own datum when making their maps and doing their survey. These are referred to as local datum. The same area may have two datum giving each point two different coordinates. In addition, datum generated by individual countries does not match at their boundaries. 10-14. The FOS device provides a means of transforming coordinates referenced to one datum into coordinates referenced to a different datum. 10-15. For the survey operational mode only, the survey transformation and conversion function allows the operator to perform various types of coordinate conversions and datum-to-datum transformations. The options are selected from the transformation menu. See TB 11-7021-228-10-1, for step-by-step procedures.