4 - Central Institute of Brackishwater Aquaculture
4 - Central Institute of Brackishwater Aquaculture
4 - Central Institute of Brackishwater Aquaculture
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Burrough defined it as a powerful set <strong>of</strong> tools for collecting, storing, retrieving as<br />
well as transPormlng and displaying spatial data from the real word.<br />
ESRI defined this as an organized collection <strong>of</strong> computer hardware, s<strong>of</strong>tware,<br />
geographic data and personal designed to efficiently capture, store, update,<br />
manipulate, analyze and display geographically referenced information.<br />
8. Basic questions that can be investigated using GIs<br />
Location Where is it .................. 7<br />
Condition How is it .................<br />
Trend What has changed .................<br />
Routing - What is the best way .................<br />
Modelling - What if ............ 7<br />
How ha 11 chn gcd..... <br />
Whkh 'Jam uc mlrtcd. .-<br />
Water orno vorl.(lon<br />
In pro mmnmoon mnd<br />
pod mmnaon<br />
Oror prlmw y<br />
productlvny. pn end<br />
If DO k low In that<br />
time. (hen7<br />
RaqllhadF.~~~ihmdCIS<br />
9. Acquisition <strong>of</strong> data for GIs<br />
CIS can not work without data. The more the data more versatility and greater<br />
potential functionality <strong>of</strong> GIs. There are two type <strong>of</strong> data viz. primary data and<br />
secondary data. Primary data collection consists <strong>of</strong> acquiring various types <strong>of</strong><br />
original data by a number <strong>of</strong> persons or direct methods and techniques.<br />
Secondary data represents available data or information, which may be availed<br />
in different formats.<br />
10. Data acquisition and input<br />
First Step - Developing database for GIs<br />
Acquire data<br />
Input to GIs<br />
Data<br />
Spatial<br />
Non-spatial
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