The NTv2Creator software creates precise NTv2 files by comparing identical points in two distinct reference systems, making it an effective geospatial modeling tool.
NTv2Creator is a powerful geosoftware tool that allows users to create accurate NTv2 files from identical points in two different reference systems. The software offers various features including boundary analysis, mesh size suggestions, and manual adjustments before generating a highly precise NTv2 file. Three different mathematical models are used for the modelling of NTv2 files.
At the beginning of the processing, the software checks the coordinates of the identical points for outliers and deviations using statistical methods. The next step involves calculation of all grid points. For each grid point, NTv2Creator collects identical points from the source and target point files which lie in a certain radius around the grid point.
The software then performs a 3D 7-parameter Helmert transformation by taking these points into account. During the coordinate transformation of the grid point, the Helmert parameters are used to determine the coordinate of the same grid point in the target reference system. Natural Neighbour interpolation is employed to distribute the residual gaps and improve the accuracy of the results.
The difference between the coordinates of the grid point in both reference systems is then entered as a shift value in the NTv2 file. The shift values compensate for regional and local tensions and consider the different dimensions and bearings of the ellipsoids used in both reference systems.
Overall, NTv2Creator offers a comprehensive solution for modelling accurate NTv2 files. Its advanced features and mathematical models combined with statistical checks and manual adjustments make it a powerful tool for geospatial professionals.
At the beginning of the processing, the software checks the coordinates of the identical points for outliers and deviations using statistical methods. The next step involves calculation of all grid points. For each grid point, NTv2Creator collects identical points from the source and target point files which lie in a certain radius around the grid point.
The software then performs a 3D 7-parameter Helmert transformation by taking these points into account. During the coordinate transformation of the grid point, the Helmert parameters are used to determine the coordinate of the same grid point in the target reference system. Natural Neighbour interpolation is employed to distribute the residual gaps and improve the accuracy of the results.
The difference between the coordinates of the grid point in both reference systems is then entered as a shift value in the NTv2 file. The shift values compensate for regional and local tensions and consider the different dimensions and bearings of the ellipsoids used in both reference systems.
Overall, NTv2Creator offers a comprehensive solution for modelling accurate NTv2 files. Its advanced features and mathematical models combined with statistical checks and manual adjustments make it a powerful tool for geospatial professionals.
What's New
Version 2.09: Program is faster and more stable using a new development system. Outliers can be excluded from the calculation. Calculated coordinates can be written to external files. New chapter about structure and format of NTv2 grids in the help file. The quality check displays deviations in clusters.