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High Resolution 1:10,000 scale Mapping Strategy of Multi ... - NDMA

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Figure App 20.4:<br />

Design <strong>of</strong> GCP Library Phase-I Monument -Data Processing and<br />

Adjustment<br />

Connection with ITRF<br />

As per the IAG recommendations, the datum will be connected with ITRF.<br />

India has two IGS stations, one at Bangalore (IISC) and another at Hyderabad<br />

(HYDE). In addition to these, the IGS stations available around the Indian<br />

subcontinent Beijing (BJFS), Ankara (ANKR), Wuhan (WUHN), Lhasa (LHAS),<br />

Poligan/Bishkek (POL2) and Kitab (KIT3) will also be used as fiducial points. The<br />

Indian Permanent GPS Stations will be connected with these IGS stations to get the<br />

datum in terms <strong>of</strong> ITRF.<br />

First Adjustment<br />

The GCP Library Phase-I stations were observed independently and the data<br />

had been processed with respect to IGS stations to determine the coordinates in<br />

terms <strong>of</strong> ITRF. These coordinates can be used for general mapping purposes until<br />

the datum is realized. The network adjustment has to be carried now. As already<br />

mentioned above, the GCP Library Phase-I stations were observed independently<br />

209

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