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RFP for ANAND & other Seven DISTRICTS Resurvey project n. All data products should be handled carefully to avoid any loss or damage. In case of any damage / loss, the Agency/s stands the responsibility of replacing fully. o. An understanding on security aspects such as safe custody of data / reports / material is to be signed by the Agency/s at the time of taking data from the govt. p. The specification / guidelines may be revised from time to time and the same will be given to the Agency/s. Agency shall therefore make sure that the revised specification / guidelines are followed thereon. q. Agency shall deploy a simple web site or a suitable tool to publish summarized view of the project progress and status. This shall be available on line and shall be accessible to all the stake holders. However this shall not be accessible to the public domain. 2/22/2011 36
RFP for ANAND & other Seven DISTRICTS Resurvey project Annexure I Ground Control Network & Monumentation There shall be Ground control Network at 4 levels (incase of non availability of (SOI) data, GCN at 5 level All the control points should be based on datum given below: Horizontal Datum : WGS-84 (i.e. the latest version of the World Geodetic System standard for use in cartography) The Primary Control points of the Survey of India (SOI), provided by static GPS observations (72 hours) with dual frequency GPS receivers, should be used as reference points for preparing district net work to link the district with national survey net work. In case of non availability of SOI data of network control points ,same kind of data and control points should be established in consultation with SOI and prepared by the vendor with MSL datum as per below mentioned standards . Base Station: At centre of Area of Interest (AOI) With minimum 72 hour observation by GPS with accuracy of 1:100000 Regional Station: Control point at a distance of 40 k.m. average with a minimum 24 hour observation with GPS at a accuracy of 1: 50000 The primary control points of the SOI Should have been post processed with the precise ephemeris adjusted with the help of precise engineering soft ware (eg. Berenese s/w ) to the ITRF co-ordinate system or with a consultation of Survey of India . All the primary and secondary control points of districts should be connected to base and regional station of the SOI as created above, to ensure connection to the National Framework. Vertical Datum: MSL, i.e. mean Sea Level. The precision Bench Mark of the SOI should be used as primary vertical control 1. Primary Control Points: Horizontal i. What kind of places: In protected areas like premises of permanent government offices etc. The selected site should be open and clear to sky with acute angle of 15 degree. High tension power lines, transformers, electric substations ,microwave 2/22/2011 37
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