Killet GeoSoftware Ing.-GbR - short: KilletSoft - is a software company, which was established in the year 1991. The society is divided into the ranges "Geodetic Standard Software", "Development Tools for Geoinformatics" and "International Geodata". The focal trades of the companies supplied by KilletSoft are consulting engineers, GIS developers, Internet marketing, public utilities, logistics, telecommunications, security and public services.
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TRANSDATpro - Geodetic Coordinate Transformations
Download of the suppoeted NTv2 / HARN grid files

Coordinate Transformation

Worldwide collection of NTv2 files

In the context of a training measure we have created a worldwide collection of most official NTv2 links.

Click here for the link_in collection of NTv2 files with the possibility for direct download.

NTv2 gridfiles in GSB and GSA file format

NTv2 (National Transformation version 2) datum shifts are done with grid files which comes in a binary format (GSB) and an ASCII format (GSA). It can transform coordinates between two different geodetic reference systems. The transformation provides heigh actuality and does not require ellipsoidal heights.

HARN gridfiles

The geodetic functionslibrary GeoDLL is prepared for coordinate transformations with arbitrary NTv2 gridfiles and with the American HARN gridfiles. But the HARN gridfiles of the U.S. states are available as equivalent NTv2 gridfiles. All by TRANSDATpro supported NTv2 and HARN gridfiles can be downloaded from this website.

Support of the NTv2 standard by the Geosoftware TRANSDATpro

The NTv2 method uses binary files to perform accurate datum shifts from one geodetic Reference System to an other. An NTv2 file contains the differences between the two Reference Systems as geographic seconds in a grid. A bilinear interpolation is used to calculate the exact coordinates for a point in the target Reference System.

Depending on the geographic coordinate NTv2 can check several grids contained in the file for the information with the highest accuracy. An NTv2 file always contains a single-precision base grid (parent). Certain areas, such as cities, can be included in the file as local grids with a higher grid density and thus higher accuracy. These local grids overlap areas of the base grid. If a point lies within one of the grids with the higher accuracy, NTv2 will use it, otherwise the point will fall through to the base grid with the lower accuracy.

Quality analysis of GeoDLL and TRANSDATpro with NTv2 test data

The accuracy of NTv2 datum shifts with the program TRANSDATpro and the Geodetic Development Kit GeoDLL from KilletSoft has been investigated twice in detail:

  1. Quality analysis by the network operator link_in Westnetz GmbH.
  2. Quality analysis with test data of the link_in Survey Authorities of Germany.
    Download the link_dl test log.
KilletSoft News In order that you are always well informed about our company, we write actual news, current information and special offers here into this column.
KilletSoft Logo CRS
What actually is a Coordinate Reference System?
link_in Read the Worksheet...
KilletSoft Logo GeoDLL 32Bit + 64Bit
New sales concept for the Geodetic Development Kit GeoDLL. Both releases 32Bit and 64Bit together now have the same price as before only one of the two releases.
link_in Read the Press Release...
KilletSoft Logo Geodata Germany
"Geodata Germany" has been updated on the data conditions of January 1st, 2021. The database contains Towns and Municipalities, Town Districts, Coordinates, Postal Codes, Dialling Codes, Wind and Snow loads, Solar irradiation etc.
link_in
KilletSoft Logo EU Business Award 2020
Award 2020 The EU Business News Magazine from Great Britain has given the "EU Business Award 2020" to KilletSoft. link_pdf Read the Award...
link_in Read the Press Release...
KilletSoft Logo NTv2Creator
We provide professionals in geodesy and surveying with an economical standard software that allows them to generate accurate NTv2 solutions on their own.
link_in Read the Press Release...
KilletSoft Logo Plus Code / Open Location Code
Display Formats of Coordinates in Plus Code / Open Location Code (OLC).
link_in Read the Worksheet...
KilletSoft Logo is member of
VDV Logo
KilletSoft Logo NTv2 collection
KilletSoft has brought together NTv2 files as a worldwide collection on a central website and linked for the direct download.
link_in Read the Press Release...
link_in To the NTv2 collection...
KilletSoft Logo CRS in Germany
Traditional and modern Coordinate Reference Systems (CRS) as example of Germany.
link_in Read the Worksheet...
KilletSoft Logo NTv2 Toolbox
Geosoftware with Tools for analyzing and processing of NTv2 files.
link_in Read the Worksheet...
KilletSoft Logo Translators wanted!
The programs TRANSDAT, SEVENPAR, NTv2Creator, NTv2Poly and NTv2Tools support language files for the programs interface. Since the language dependent texts are managed in external files, link_in new languages can be added at any time by creating new language files. Everybody who is interested can translate a new language file into his native language for himself and all users.
Author: Dipl.-Ing. Fred Killet
Page name: p_trdn_e.htm
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Period: since Januar 1, 2021