Germany - surveying services

Description

The geometric levelling and the associated geodetic instruments shall be adjusted to the accuracy requirements (1st order, standard deviation for one kilometre double levelling ≤ 0.4 mm, permissible line contradiction ZS=0.5*S+-1.5*SQRT(S) taking into account the local conditions. For levelling, at least three measurement teams must be used daily. In addition, a reserve measuring team must be available for levelling and classical current transition levelling will be observed for height transmission with large and varying target distances. Special equipment from Zeiss can be provided free of charge by the Federal Institute for Hydrology (BfG). No marking work is required. The further processing of the levelling data as well as the calculation of the final heights is carried out by the client.Supplementary tender documents (point and line shape, projection file, notes on classical power transition levelling, current police ordinance, BMVBS decree on occupational safety at dams, safety information, interface descriptions GeoBas, documentation of the VRONI and ZWIRN programmes) can be downloaded from the FTP server of the Federal Institute for Hydrology (call: _COPY7@ftp.bafg.de).Only for lot 1: Information on special features on accessibility of the elevation reference points in the core zones of the Mittelelbe biosphere reserve:- NSG Krägen-Riß, ca. Elbe, km 243 - 245 left bank,- NSG Saarenbruch-Matzwerder, ca. Elbe, km 249 - 252 right bank,- NSG Untere Mulde, bridge of the B184 over the Mulde, - NSG Saalberghau, ca. Elbe, km 262-266 left bank,- NSG Steckby-Lödderitzer Forst, ca. Elbe, km 275 - 290 right and left bank.Note: All elevation control points in the aforementioned areas of the Mittelelbe biosphere reserve can be reached via main roads without cutting work. The geometric levelling and the associated geodetic instruments shall be adjusted to the accuracy requirements (1st order, standard deviation for one kilometre double levelling ≤ 0.4 mm, permissible line contradiction ZS=0.5*S+-1.5*SQRT(S) taking into account the local conditions. For levelling, at least three measurement teams must be used daily. In addition, a reserve measuring team must be available for levelling and classical current transition levelling will be observed for height transmission with large and varying target distances. Special equipment from Zeiss can be provided free of charge by the Federal Institute for Hydrology (BfG). No marking work is required. The further processing of the levelling data as well as the calculation of the final heights is carried out by the client.Supplementary tender documents (point and line shape, projection file, notes on classical power transition levelling, current police ordinance, BMVBS decree on occupational safety at dams, safety information, interface descriptions GeoBas, documentation of the VRONI and ZWIRN programmes) can be downloaded from the FTP server of the Federal Institute for Hydrology (call: _COPY7@ftp.bafg.de).

Opportunity closing date

21 May 2019

Value of contract

to be confirmed