Geographical Information System (GIS) — Chapter Summary
ICSE · Class 12 · Geography
Summary of Geographical Information System (GIS) for ICSE Class 12 Geography. Part of the ICSE Class 12 Geography syllabus.
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Overview
Geographical Information System (GIS) is a computer-based system for handling spatially referenced data about the Earth. It helps in capturing, storing, checking, integrating, manipulating, analysing, and displaying geographical information. GIS is part of spatial information technology, which also
Key Concepts
Spatial information technology refers to
Spatial information technology refers to the distribution of phenomena over geographical space. It is an amalgamation of Remote Sensing, GPS, GIS, Dig
GIS is a computer system
GIS is a computer system that can hold and use data describing places on the Earth's surface. It is formally defined as a system for capturing, storin
Spatial data are geographical data
Spatial data are geographical data with a definite location and geometrical shape. They may be represented as point, line, or area features.
Non
Non-spatial data describe spatial data and are also called attribute data. They give additional information about a geographical feature.
Raster data are arranged in rows
Raster data are arranged in rows and columns called a grid. Each square at the intersection of a row and column is a grid cell. Raster is suitable for
Learning Objectives
- To understand the meaning and definition of GIS
- To distinguish between spatial data and non-spatial data
- To learn the two main spatial data formats: raster and vector
- To identify the main components of a GIS
- To understand how data are entered, verified, and linked in GIS
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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