Transform vector map

The task «Transform vector map» is intended for transformation of a vector map into output coordinates system by a set of points. Coordinates of points are measured or are loaded from catalogs of coordinates. In the task four linear and three nonlinear transformation methods are realized.

To determine the parameters of transformation it is necessary:

- select a transformable map from the list of open maps;

- specify a name of output map;

- select the transformation method;

- specify catalogs of coordinates of control points in the input and output coordinate system or to measure the points on the input and additional map (the map for the measurement of points in the output coordinate system). Points in the output coordinate system can be downloaded from objects of additional map the selected objects by clicking the "Output coordinates add from ...";

- if necessary to install advanced options.

Recalculation of parameters of transformation is carried out automatically at measurement of points or at change of transformation parameters. By results of calculation of parameters of transformation the residual differences and a mean-square error are displayed. After calculation of transformation parameters it is possible to execute at once transformation, having pressed button "Transform", or for the analysis of nonlinear distortions to build matrixes of distortions by pressing the button «Build matrix». If the map has no selected objects, then all map objects will be transformed, if so, then only selected ones. By results of transformation the protocol with prt extension in a folder of the transformed map is created.