Geocalculator

      Ribbon: Topoplan – Settings >  Geocalculator

      Menu: Topoplan – Settings >  Geocalculator

      Toolbar: Topoplan Settings >  Geocalculator

   Command line: NG_GEOCALC

The command allows you to:

Calculate the parameters of transformation of coordinate systems

spatial 3-dimensional:

·         7 parametric Helmert transformation;

·         9 parametric Helmert transformation;

·         Molodensky transformation.

flat rectangular:

·         4 parametric Helmert transformation;

·         5 parametric Helmert transformation.

Recalculation of coordinates

geodetic:

·         geographic to flat rectangular Gauss-Kruger or UTM and back;

·         geographic and rectangular between 3-dimensional coordinate systems, using the recalculation parameters;

flat arbitrary:

flat rectangular between 2-dimensional coordinate systems, using the recalculation parameters.

Calculations are made both for individual points and for files.

Calculating distances and directions on a plane and an ellipsoid

The source data is located in the LIB directory in the program installation directory (Nanosoft\Ошибка! Неизвестное имя свойства документа. 25.0\UserDataCache\maplib\LIB). Changing the directory name and its location is not allowed.

The Ellipsoid Library is required for the command to work. The ellipsoid data is a text file gt_ellips.csv, containing the name, code, major and minor semi-axes in meters, and the denominator of compression for each ellipsoid. The field values are separated by commas.

A fragment of the file is given below:

NAME,CODE,A,B,RF

Airy 1830                     ,AA,6377563.396,6356256.9090,299.324964600

Modified Airy               ,AM,6377340.189,6356034.4480,299.324964600

Australian National       ,AN,6378160.000,6356774.7190,298.250000000

The file can be edited by the user, but the file name and format should not be changed. Viewing the ellipsoid library is available from the  Calculate Transformation Parameters dialog.

The main window is the transaction log window. All calculation results are displayed in the log window.

The geocalculator has a built-in toolbar, which is located under the window title.

 - Transformations

 - Transformation parameters

 - Distances and directions

 - Templates

 - Clear log

 - Save log

Transformations

The coordinates are recalculated using EPSG codes in a dialog box opened from the  Transformations toolbar.

Transformation parameters

The coordinates are recalculated in the dialog box opened from the  Transformation Parameters toolbar.

Distances and directions

Distances and directions are recalculated in the dialog box opened from the  Distances and directions toolbar.

After selecting an ellipsoid from the library, the following tasks can be solved:

Azimuth and distance applied to a geodetic line.

Forward geodetic task.

Inverse geodetic task.

On a plane.

Forward and inverse geodetic tasks.

Templates