TransLT is designed to calculate the transformation parameters and the transformation of coordinates between two coordinates systems is a fast and practical way. The software is aimed at specialists who use GPS technology to perform geodetic works.
TransLT is an application which offers the following three major functionalities:
- The calculation of transformation parameters between two coordinates systems;
- The transformation of coordinates between two coordinates systems;
- Drawing of polygons, paths or points in Google Earth.
To make it easy to operate with the multitude of existing reference coordinates systems, TransLT contains a module that extracts information from EPSG database.
The program interface is intuitive, easy to use, the data can be imported from txt or csv files, and it allows saving the modification for each step of the transformation.
Main features of TransLT:
- Calculation of transformation parameters and coordinates transformation for 1D, 2D or 3D transformations;
- Coordinates coversions between geographical coordinates systems, geocentric cartesian and the coordinates of a map projection system;
- Supports a large number of map projections (109 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 automaticaly generated using the EPSG database;
- 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 or 12 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
To implement TransLT in other programs you can download the examples made in the following programming languages:
What's new in TransLT 2.0
- Added three more map projections: Krovak Oblique Conformal Conic Modified - EPSG method code 1042; Krovak Oblique Conformal Conic Modified (North Orientated) - EPSG method code 1043; Mercator (2SP) (Variant C) - EPSG method code 1044.
- Added two more types of GRID files: Grid file of geoidal model type OSGM02; Grid file type OSTN02/OSGM02 – EPSG method codes 9633 and 9663.
- Changes have been made to the name of some projections.
- The program was adapted according to the last changes made in EPSG V7.6 database (November 2010).
- For transformation models from Transformation in steps section, the type of initial and final coordinates was changed. The type of initial and final coordinates can be: Cartesian, Geographic 2D, Geographic 3D, Projection plane 2D or Projection plane 3D. With regards to the former version now you can choose if the initial and final coordinates systems are 2D or 3D (with or without altitude), in the case of the geographical coordinates or projection plane coordinates.
- Generation of transformation models using EPSG database was revised by considering also 2D coordinates reference systems.
- In tables contextual menu coordinates loading from file command and coordinates saving in file command were added.
- The contextual menu of the transformation models list was improved, the model or step characteristics adding and editing commands are, from now on, explicitly shown.
- In the transformation models list from Transformation in steps section, elements from the list can be moved using mouse drag and drop procedure.
- The presentation of information about transformation models from Internet loading and downloading windows was changed.
- All of the contextual menus were translated and icons were added to their commands.
- In the Parameters calculation section accessing the page and selecting the transformation type can be done with double-click in pages list or in transformation types group.
- At drawing in Google Earth was introduced the possibility to preview the entity's balloon description.
- The information about Coordinates System (CS) was added when viewing the information about CRS taken from EPSG database.
- When converting files, if the output file is identical to the input file (allocated extension is identical) then output file name is changed by adding to its name (1), (2) or (...) until it is not found a file with this name.
- To ensure a better precision for the Transverse Mercator map projection, calculation formulas were changed with JHS formulas that can be used for a wider range up to ±40º of longitude from the central meridian. USGS formulas previously used were ensuring a centimeter precision for a range of up to ±4º of longitude from the central meridian. Map projections affected by this change: Transverse Mercator, Transverse Mercator (South Orientated), Transverse Mercator Zoned Grid System and Universal Transverse Mercator (UTM).
TransLT online Help:
Read the online help for TransLT
System requirements:
Supported operating systems:
- Windows: XP / Vista / Windows 7.
Prices for TransLT:
- New license of TransLT: 70 EUR + VAT
- PROMOTION - New license of TransLT + TopoLT + ProfLT: 600 EUR + VAT
- PROMOTION - New license of TopoLT + TransLT: 400 EUR + VAT
- Free 30 days trial version - Click here to download
- Note: the prices do not contain VAT (0% for EU countries, excluding Romania).
