Besides the usual Geographic Information Systems (GIS) are a large number of geodetic applications and data collections, which are used for recording, editing and presentation of spatial data. The thereby used spatial data are available in a wide variety of coordinate systems and reference systems. Here the program TRANSDAT is needed to transform the spatial data from different data sources and data structures from one coordinate reference system (CRS) to another and if needed to modify the data structure simultaneously.
TRANSDAT is a professional computer program for world-wide Coordinate Transformations between national and country-specific Coordinate and Reference Systems with high precision and good performance:
You will find a complete list of the Coordinate and Reference Systems supported by the program on the internet or after downloading the free test version of the program. TRANSDAT supports all by the INSPIRE directive prescribed ETRS89 conversions with NTv2 grid data, e,g. Gauss-Kruger / DHDN to UTM / ETRS89 with BeTA2007. The NTv2 standard with national grid files is world-wide full supported. The use of EPSG codes for the Coordinate Reference Systems is possible. Apart from the given world-wide and state-specific systems, your own personal Coordinate Systems and geodetic Reference Systems can be defined with Helmert (Bursa / Wolf, ISO19111) or Molodenski Parameters. Calculations can be performed with coordinates entered directly, loaded from files in various formats (Text, CSV, SDF, dBase, KLM, ArcShape and ArcGenerate), or passed via batch processing. ArcShape files can be viewed with the program-internal Shape Viewer. A programmable GPS interface makes it possible to read coordinates into a notebook computer from a low-cost GPS antenna.
The program has a user-selectable multi language interface and comes with extensive online help. The program can be run on most common networks and it is possible to use Terminal Services on WINDOWS Servers. In case of a network installation the clients are installed automatically by the program.
Additional to in TRANSDAT predefined Coordinate and Reference Systems listed under the link above, user defined Coordinate Systems can be used by the input of the necessary transformation parameters.
During Coordinate System selection, the appropriate Reference System can be selected automatically or independent from the Coordinate System. The Reference Systems listed under the link above can be used for geodetic datum shift in both source and target Coordinate Systems. It is also possible to setup user-defined Reference Systems for transformations into regional grids or custom Coordinate Systems. The transformation parameters include three translation vectors, three rotation angles and a scale factor in case of the Helmert transformation "Coordinate Frame Rotation" or "Position Vector Transformation" datum shift, or three translation vectors in case of Molodenski three parameters datum shift.
User defined Coordinate Systems and user defined Reference Systems require the definition of suitable earth ellipsoids. The definition effected via the selection of pre defined ellipsoids or via the input of the semi axes of the source and target ellipsoids.
Exact datum shifts in local systems are possible by supporting the NTv2 standard with grid files.
The selection of the continents, countries, coordinate systems, reference systems and meridian strips can be simplified by the direct input of EPSG codes.
The source coordinates can be entered directly into the input fields of the program window and transformed using the previously selected settings. The calculated results will be displayed. The program will automatically save the entered source coordinates and the calculated target coordinates to a log file. You can review and retrieve log file contents using external programs.
It is very important to be able to perform fast calculations on large amounts of coordinate data stored in files of different file formats. TRANSDAT allows loading data from Text, CSV, SDF, dBase, ArcShape and ArcGenerate input files. A large number of Setup options allow the adjusting to different input file data structures. Calculated coordinates can be stored in Text, CSV, SDF ,dBase, KLM, ArcShape and ArcGenerate output files. Here again TRANSDAT offers a large number of program Setup options for the output file structure.
During the file handling the unrestricted conversion between the data formats named above is possible with or without Coordinate Transformations. Geometries saved as ArcShape files can be viewed in the programs internal shape viewer. Geometries saved as KML files can be viewed in Google Earth directly.
The conversion of the data formats for example makes possible the transfer of geometries contained in ArcView and ARC/INFO Shape files and in ARC/INFO Generate files to KML-Files, which can be used in Google Maps / Earth and OpenStreetMap. A further interesting example is the transformation of the geometries contained in ArcShape files and ArcGenerate files to other Coordinate Systems. TRANSDAT is able to convert between ArcGenerate files, ArcShape files and KML files, taking account of point, line and polygon shapes.
Line by line copying from Text files is particularly efficient, whereby the transformed coordinates are inserted in place of the original coordinates inside the text. The search for coordinates scattered arranged in the text and their conversion is possible. The flexibility of the program TRANSDAT opens a large count of further conversion possibilities, e.g. the use of filters.
The batch processing allows the automatic execution of one or more files using a batch file. Thus makes the program TRANSDAT controllable from other programs or it can transform large amounts of coordinates unsupervised.
TRANSDAT uses Coordinate Transformation formulas based upon EPSG specifications and publications by Schatz, Schuhr and Klotz and Hooijberg. Algorithms used for country-specific transformations are either published or made directly available by the Measurement Authorities of the respective countries or by similar respectable institutions. To achieve the highest precision only strong formula algorithms are used for calculations.
Coordinate Transformations without changing the geodetic Reference System have extremely high precision ranging within millimeters. A good example of geographic coordinates transformations between Gauß-Kruger and UTM Coordinate Systems made with TRANSDAT are the results published by the North-Rhine Westphalia Land Survey Commission. It was confirmed that the differences were within the lower millimeter range.
For a statement about the accuracy were comparative calculations realized with a set of test data of the "Arbeitsgemeinschaft der Vermessungsverwaltungen der Länder der Bundesrepublik Deutschland" (ADV). It was confirmed that the differences were less then a millimeter.
Shape files of the GIS systems ArcView and ARC/INFO can be converted directly into an other Coordinate System while maintaining the internal data structure. During the file handling the unrestricted conversion between the data formats Text, CSV, SDF ,dBase, KLM, ArcShape and ArcGenerate with or without Coordinate Transformation is possible. TRANSDAT converts ArcGenerate and ArcShape point, line and polygon geometries into KML files. Geometries generated as KML files can be viewed in Google Earth directly. In ArcShape files available geometries can be represented in the program internal Shape Viewer.
The program SEVENPAR is equipped with a modern graphical user interface of which handling is to understand intuitively. For each window detailed help texts can be shown. The detailed electronic documentation of the program TRANSDAT is available in both English and German language. However, the user interface can be represented in many languages. For this purpose, external language files are used. When starting the program, it notes which language files are available in the calling directory. The found languages then are provided for selection in a list box. By creating new language files, new languages can be added to the program TRANSDAT at any time.
Teh program TRANSDAT can be run on most common networks. The client installations works automatically. It is possible to use Terminal Services on WINDOWS Servers like e.g. "Citrix Terminal Server".
TRANSDAT has an integrated GPS interface to receive coordinates, speeds and motion directions with an inexpensive GPS antenna connected to a serial or USB interface. In a graphical window up to 2500 GPS positions are shown.
All TRANSDAT geodetic functions are contained in a Windows 32-bit dynamic link library named GeoDLL. You can make calls to GeoDLL from your programs. Using GeoDLL to perform geodetic calculations in your applications will save you time and expense necessary for development of geodetic transformation routines.
Hardware and operating system requirements
TRANSDAT is a quite complex application. To ensure stable performance it should be installed on a personal computer with the processor class 80486 or higher and at least 32 MB RAM available. The program will run under Microsoft WINDOWS 95 / 98 / 2000 / XP / NT / Vista / 7 and compatible operating systems.
This software is not reviewed yet.
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