Brief Description of the Current Version Development Tool Description Specification Function coordtrans3d() as example List of coordinate and reference systems
NTv2 support with GeoDLL Useage of Digital Elevation Models with GeoDLL Screenshots Download GeoDLL test version Prices GeoDLL full version Order GeoDLL full versionNTv2 means "National Transformation Version 2". The NTv2 method uses binary files to perform accurate datum shifts from one geodetic reference system to an other. A 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.
NTv2 is designed to check multiple grids for the most accurate shift information. A NTv2 file contains a low density base grid (parent). Certain areas such as cities can have high density local sub grids. The sub grids overlay portions of the base grid. If a point is within one of the high density sub grids, NTv2 will use the high density grid, otherwise, the point falls through to the low density grid.
A description of the NTv2 algorithm can be found in the following sources:
NTv2 für Deutschland, 2006.
Here the NTv2 binary files are listed, which are supported by the geodetic Library GeoDLL and the program TRANSDAT.
In the second line always the original source is shown, from which the original NTv2 file can be downloaded and information about the associated geodetic reference systems are given.
In the third line is a link, from which the NTv2 file can be download direct from the KilletSoft server.
It is recommended to use the original NTv2 files from the original sources, because the actuality of the files stored on the KilletSoft server is not guaranteed.
Important note:
If you want to use the here listed NTv2 files, you must necessarily note the terms and conditions of their authors!
All rights and liabilities, resulting from the use of the data, bears solely the user!
KilletSoft does not guarantee the accuracy of the data!
Intergovernmental Committee on Surveying & Mapping. Download A66_NAT
Intergovernmental Committee on Surveying & Mapping. Download A84_NAT
Natural Resources Canada: Canadian Spatial Reference System - NTv2. Download NTV2_0
Paul Kelly: Creation of NTv2 Grid File for France. Download FRANCE
Bundesamt für Kartographie und Geodäsie. Download BeTA2007
Paul Kelly: OSTN02 in NTv2 format for OSGB36<-->ETRS89. Download ENGLAND
Paul Kelly: OSTN02 in NTv2 format for OSGB36<-->ETRS89. Download SCOTLAND
Land Information New Zealand: GD2000it Download. Download NZGD2KGR
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In order that you always are well informed about our company, we write actual news, current information and special offers here into this column.
Order processing while annual closing
In the time between January 5. and January 13. we are unreachable for our customers, because we have holiday season.
All incoming orders during this time will be delivered on Wednesday, January 14.
Free update by purchasing Geo Data German Admin
Geo Data German Admin are updated every year in March / April.
That you do not have a disadvantage, when you acquire the data still before the annual actualization in the year 2009, you get a free update.
GK --> UTM with BeTA2007
The convertion of your geodata from Gauss-Kruger to UTM with BeTA2007 - Its so easy!
Read the Worksheet and the Press Release ....
Spatial data updates
The contract between a data distributor and GeoKontor was terminated in June 2008.
With immediate effect, KilletSoft has been commissioned to organize an update service for the spatial data ("geodata") acquired by them in the years 2006 to 2008 at the level of Zip code (post code), streets and individual buildings.
Please contact us if you require an update of such data.
Administrative Reform in Saxonia
The administrative data bases of the Federal Republic of Germany "Geo Data German Admin" were updated to the reference date of August 1st, 2008!
Thus the changes due to the administrative reform in Saxonia are included in all data bases.
Read our Press Release ...
Snow and Wind Load Zones of the towns and cities in a newly-created data base
Read our Press Release ...
Nature Area Classification
The product "GeoData German Admin" has been enhanced with two new data tables containing the "Nature Area Classification" and the Landscapes.
This will allow associating nature area and landscape information to all localities.
Read our Press Release ...
GeoDLL supports 3D coordinate- transformations
After our Dynamic Link Library has become super fast by recoding to C++, GeoDLL now is able to calculate 3D coordinate transformations considering the ellipsoidical heights.
As well calculations with cartesian coordinates are possible now.
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