GeoDLL - Geodetic Development Kit
Function group "Coordinate Transformations"

•  Detailed Description of the current Version
•  Descriptions of the GeoDLL Function Groups
•  User Manual with all Function Descriptions
•  User Manual searching for expressions
•  List of Coordinate and Reference Systems
•  Download of the supported NTv2 / HARN grid files
•  Programming example  Group Prices GeoDLL
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GeoDLL - Accurate Coordinate Transformations

GeoDLL supports the development of geodetic software by providing geodetic functions, which are put together into function groups for specific tasks. To use accurate coordinate transformations in own developments a license for the function group "Coordinate Transformations" can be purchased.

GeoDLL performs Coordinate Transformations fast and with high accuracy. For this purpose the DLL supports thousands of worldwide Coordinate Systems, geodetic Reference Systems, Reference System Transitions (geodetic datum shifts) and Meridian Strip Transitions. Additional the software supports User-defined Systems, 2D/3D transformations, Extra Parameters like Meridian Convergence and Origin Center Meridian, INSPIRE, NTv2, HARN, EPSG, GPS, Continental Drift and much more.

Characteristics of the group "Coordinate Transformations"

1. Coordinate Transformation
2. Reference System Transition
3. Meridian Strip Transition
4. 2D and 3D Coordinate Transformation
5. Helmert and Molodensky Reference System Transition
6. NTv2 and HARN grid file support
7. Forward and backward transformations
8. Numeric and alphanumeric coordinates
9. Geographic and Cartesian coordinates
10. Many projections (also rarely used ones)
11. Thousands of predefined systems
12. Use of EPSG codes
13. Use of Measurement Units
14. Calculation of Meridian Convergence, Origin Center Meridian, Geographical Point

Functions of the group "Coordinate Transformations"

1. Function coordtrans() - 2D Coordinate Transf. / Datum shift, num. / alphanum. (char**)
2. Function coordtrans2() - 2D Coordinate Transf. / Datum shift, num. / alphanum. (char*)
3. Function coordtrans3() - 2D Coordinate Transformation / Datum shift, num., with notation
4. Function coordtrans4() - 2D Coordinate Transformation / Datum shift, num, without notation
5. Function coordtransex() - 2D Coordinate Transf. / Datum shift, reduced eastings
6. Function coordtrans3d() - 3D Coordinate Transf. / Datum shift, num. / alphanum. (char**)
7. Function coordtrans3d2() - 3D Coordinate Transf. / Datum shift, num. / alphanum. (char*)
8. Function coordtrans3d3() - 3D Coordinate Transformation / Datum shift, only numeric
9. Function coordtrans3d4() - 3D Coordinate Transformation / Datum shift, only numeric, no notations
10. Function coordtrans3dex() - 3D Coordinate transform. / Datum shift, reduced eastings
11. Function coordtransepsg() - EPSG code Coordinate Transformation / Datum shift
12. Function meritrans() - Meridian strip change with GK und UTM coordinates
13. Function setcoordarea() - Coordinate System range check on / off
14. Function setcalcextra() - Calculation of extra parameters on / off
15. Function coordcalcextra() - Calculation of extra parameters during coordinate transformations
16. Function coordcalcextraind() - Calculation of extra parameters independend of coordinate transformations

Ausführliche Funktionsbeschreibungen

Detailed descriptions of all geodetic functions of this function group you find  here in the Online Manual!