From MapTiler Team
Geodetic CRS: CH1903
Datum: CH1903
Ellipsoid: Bessel 1841
Prime meridian: Greenwich
Data source: OGP
Information source: Bundesamt für Landestopografie swisstopo; www.swisstopo.ch
Revision date: 2015-12-30
Scope: Approximation using NTv2 method of results of FINELTRA programme to an accuracy of 0.01m except at boundary of the Geneva and Vaud cantons, in city of Geneva and in the main valleys of Valais canton where differences are up to 20 cm.
Remarks: For improved accuracy (0.01m) use CHENyx06 interpolation programme FINELTRA. File CHENyx06 replaced by CHENyx06a; there is a small area at the border of the data where some more real data has been introduced. swisstopo consider the change insignificant.
Method: NTv2
Area of use: Liechtenstein; Switzerland.
Description: CHENyx06a.gsb
Definition: OGP XML
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<gml:name>CH1903 to CH1903+ (1)</gml:name>
<gml:remarks>For improved accuracy (0.01m) use CHENyx06 interpolation programme FINELTRA. File CHENyx06 replaced by CHENyx06a; there is a small area at the border of the data where some more real data has been introduced. swisstopo consider the change insignificant.</gml:remarks>
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<gml:scope>Approximation using NTv2 method of results of FINELTRA programme to an accuracy of 0.01m except at boundary of the Geneva and Vaud cantons, in city of Geneva and in the main valleys of Valais canton where differences are up to 20 cm.</gml:scope>
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