• TransLT

    Coordinate transformations

TransLT is designed to calculate the transformation parameters and the transform coordinates between two coordinates systems in a fast and practical way. The software is aimed at specialists who use GPS technology to perform geodetic works.

The program interface is intuitive and easy to use and the data can be imported directly from a text or csv files. TransLT allows saving files with changes made for each step of the transformation. To make it easier to operate with the multitude of existing reference coordinate systems, TransLT contains a module that extracts information from the EPSG database.


Transformations in short time


Multiple possibilities to use

Supports various conversions

For maximum flexibility


Easy to learn and use

EPSG database

Works with multiple coordinate systems

Technical support

Continous updates and fast support

Key features of TransLT

The calculation of the transformation parameters for the common points can be made for the following situations:

  • for a 1D transformation (calculation with 5 parameters or with 1 parameter);
  • for a 2D transformation (calculation with 4, 5 or 6 parameters);
  • for a 3D transformation (calculation with 7, 8, 9, 10 or 12 parameters).

Universal coordinate transformations can be performed from one system to another by introducing coordinate operations at choice.

Conversions of coordinate files. This is another way of operation with TransLT through which coordinate files can be converted using one of the transformation models.

Drawing in Google Earth. The program allows drawing graphical entities (polygons, paths, or points) in Google Earth. The transformation of the coordinates from the projection system into geographical coordinates (φ, λ) on the ellipsoid WGS84 or ETR89 (GRS80) is made using one of the transformation models from the model list.

Downloads elevations using Google Maps Elevation API services. Elevations are obtained by interpolation from the 3D model of the Earth, data made available to users by the Google API Console. The geographical coordinate system supported by Google Maps is the one defined on the ellipsoid “WGS84” (“ETRS89”), the First Meridian “Greenwich”.

Creating your own transformation model or coordinate operations using the EPSG database.

Drawing in Google Earth allows plots to be displayed using the coordinates from projection system and can be used by real estate agents, bank officials, landowners.

DLL libraries can be integrated in other applications. So, TransLT can be used by software developers to create new programs. Read more here.

Download and try TransLT, free for 30 days!

Complete list of functionalities

  • Calculation of transformation parameters and coordinates transformation for 1D, 2D or 3D transformations.
  • Coordinates conversions between geographical coordinates systems, geocentric cartesian and the coordinates of a map projection.
  • Supports a large number of map projections (112 map projection methods);
  • Supports the majority of the polynomial transformation used in cartography.
  • Can use binary grid files or ASCII for coordinates corrections.
  • Coordinates transformations can be made using your own calculation formula.
  • Coordinates transformations can be made in user defined steps or the steps can be automatically generated using the EPSG
  • Coordinate files can be converted directly from Windows Explorer.
  • The program can be called from the command line or from another application to convert a coordinates file.
  • Drawing of polygons, paths or points in Google Earth and together with TopoLT can draw graphic entities from AutoCAD or IntelliCAD in Google Earth.

The calculation of transformation parameters between two coordinates systems can be performed in the following situations:

  • 1D transformation (calculation with 5 or 1 parameters);
  • 2D transformation (calculation with 4, 5 or 6 parameters);
  • 3D transformation (calculation with 7, 8, 9, 10, 12 or 15 parameters).

For each set of calculated parameters calculation reports are generated offering the user information about the quality of the calculated values. The parameters calculation is made easy and practical with the help of worksheets organization.

The transformation of coordinates between two coordinates systems can be done by applying 1D, 2D or 3D transformation or by applying a multiple transformation in steps. The steps of a multiple transformation can be used to make the following coordinates operations:

  • coordinates conversions (including using a map projection);
  • polynomial transformations;
  • transformations using grid files (files containing corrections values);
  • transformations with parameters: 1D, 2D or 3D;
  • transformations with user defined formula.

The multiple step transformations (which contain many successive transformations) can be saved and used later, with the possibility of applying them directly on a file using the contextual menu from Windows Explorer.

Supported conversions:

  • Geographical coordinates (φ, λ, h) → Geocentric cartesian coordinates (X, Y, Z).
  • Geocentric cartesian coordinates (X, Y, Z) → Geographical coordinates (φ, λ, h).
  • Geographical coordinates (φ, λ) → Plane coordinates (N, E) according to the selected projection.
  • Plane coordinates (N, E) → Geographical coordinates (φ, λ) according to the selected projection.

Supported map projections

Supported polynomial transformations

Supported GRID files

Supported Offset Methods

To implement TransLT in other programs you can download the examples made in the following programming languages:

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1 Year Subscription

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Upgrade License


Upgrade from TransLT 3

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*Upgrade from TransLT 4 / 5 to TransLT 6 is free of charge.

Our other products

TopoLT 13

Drawing of topographical and cadastral plans

ProfLT 13

Drawing longitudinal and cross section profiles

TopoLT 13 + ProfLT 13 + TransLT 5 Pack

One cost-effective package