Importance of a Geographic Information System Technology
A geographic information system is a computer system for recording, storing, consulting, analyzing and displaying geographically referenced data. The geographically referenced data describes both the locations and characteristics of spatial features. It is also know as geodata.
The history of GIS barely spans four decades
Websites like card search and card blowing provide quick and easy maps. Users can enter the address of the location and points of interest to get the information accordingly they want. For example, data on nearby schools and churches.
One of the most important uses of GIS is natural resource management. The other applications include crime analysis, emergencies, planning, land record management, market analysis, transportation applications.
The integration of GIS with the global positioning system (GPS), wireless technology and the Internet has introduced exciting new v applications. For example, motorists can find the shortest routes in the vehicle’s navigation system.
The growing demand for geographic data can only be met with the help of computer. GIS represents the simplified view of the real world.
Unlike traditional paper maps, a GIS can provide detailed information on features such as roads, buildings, streams, etc. Additionally, computers can quickly find and analyze map features and their attributes. These benefits are not possible with traditional cards.
Geographic data objects are geometrically
All geographic data objects are geometrically represent by points, lines, and areas. Each of the geodata has in itself the value of the coordinates.
GIS now appears as a separate discipline in the accordingly names of geomatics, ecoinformatics, geospatial information science.
There are two basic concepts in GIS. First, the functions have attributes associated with them. GIS tells us where something is and what it is. Second, the collect information must be represent as layer such as points, line, and polygon. A polygon is a solid that has a multi-sided shape.
The data is spatial or non-spatial. The latter is serve accordingly by non-spatial data management systems. The former can be geographic (GIS) or non-geographic. CAD, CAM, CAC, etc. they are not geographic. Raster GIS and vector GIS are the categories of GIS.
The GIS software consists of five functional groups such as
1. Data entry and verification
2. Data storage and database management
3. Data output and presentation
4. Data transformation and
5. interaction with users.
The advent of graphical user interface, powerful hardware and software, public digital data, etc. has broadened the scope of GIS applications and brought them into widespread accordingly use in the 1990s.