Geocalculator

The Clip Point Clouds

Control the display of Hatched Objects

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 AS\nanoCAD x64 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.