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What is a GIS? - a particular form of Information System applied to geographical data
- a System is a group of connected entities and activities which interact for a common purpose
- a car is a system in which all the components operate together to provide transportation
- an Information System is a set of processes, executed on raw data, to produce information which will be useful in decision-making
- a chain of steps leads from observation and collection of data through analysis
- an information system must have a full range of functions to achieve its purpose, including observation, measurement,
description, explanation, forecasting, decision-making
- a Geographic Information System uses geographically referenced data as well as non-spatial data and includes operations
which support spatial analysis
- in GIS, the common purpose is decision-making, for managing use of land, resources, transportation, retailing, oceans
or any spatially distributed entities
- the connection between the elements of the system is geography, e.g. location, proximity, spatial distribution
- in this context GIS can be seen as a system of hardware, software and procedures designed to support the capture, management,
manipulation, analysis, modeling and display of spatially-referenced data for solving complex planning and management problems
- although many other computer programs can use spatial data (e.g. AutoCAD and statistics packages), GISs include the additional
ability to perform spatial operations
| CE 421G |
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| |
FG |
| ID |
|
| 001402 |
3.0 |
| 095302 |
2.6 |
| 095002 |
2.7 |
| 095402 |
2.5 |
| 094202 |
5.0 |
| 919103 |
2.8 |
| 176745 |
2.9 |
| 172402 |
5.0 |
| 641704 |
2.7 |
| 801202 |
3.0 |
| 169702 |
1.5 |
| 271902 |
5.0 |
| 271502 |
1.8 |
| 271202 |
2.6 |
| 344702 |
1.8 |
| 325302 |
2.1 |
| 326102 |
2.4 |
| 256937 |
5.0 |
| 382302 |
1.6 |
| 469302 |
3.0 |
| 506857 |
2.9 |
| 469402 |
1.9 |
| 504873 |
2.7 |
| 470202 |
2.5 |
| 470602 |
2.6 |
| 532502 |
2.4 |
| 569961 |
3.0 |
| 532702 |
2.4 |
| 603337 |
2.7 |
| 934103 |
1.9 |
| 628302 |
2.2 |
| 628902 |
2.2 |
| 652302 |
5.0 |
| 652402 |
5.0 |
| 653102 |
2.9 |
| 652502 |
2.9 |
| 653202 |
2.7 |
| 652902 |
5.0 |
| 717302 |
2.2 |
| 716002 |
3.0 |
| 715802 |
5.0 |
| 716602 |
2.2 |
| 823703 |
2.0 |
| 715302 |
2.0 |
| 884202 |
2.3 |
| 887902 |
2.5 |
| 883902 |
2.0 |
| 908329 |
5.0 |
| 940902 |
1.9 |
| 937302 |
2.7 |
|
 |
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