Geographic Information System can be applied in different field which include defence, agriculture, mining, transport, urban planning, census, surveying etc.
Some of the problems of GIS in Nigeria are:
- Inadequate power
- Inadequate personnel
- Inadequate capital
- Poor communication
- Low level of technology
- Lack of GIS institutions.
GIS data represents real objects (such as roads, land use, elevation, trees, waterways, etc.).
Real objects can be divided into two abstractions: discrete objects (e.g., a house) and continuous fields (such as rainfall amount, or elevations).
Traditionally, there are two broad methods used to store data in a GIS for both kinds of abstractions.