GIS (Geographic Information System)

A geographic information system (GIS) is a computer system for capturing, storing, checking, and displaying data related to positions on Earth.

Introduction

A geographic information system (GIS) is a computer system for capturing, storing, checking, and displaying data related to positions on Earth’s surface.

Why GIS

History of GIS

Terminology

Installation

Types of GIS Data

Raster

Raster data model, a geographic feature like land cover is represented as

• Single Square Cell

Vector

Vector data model, features on earth represented as

• Points
• Lines
• Polygons

Attributes

• Attributes values in GIS are stored as relational database tables
• Each feature (point, line, polygon, or raster) within each GIS layer will be represented as a record in a table.

References

• https://shapely.readthedocs.io/en/stable/manual.html
• http://fhss.sjp.ac.lk/geog/wp-content/uploads/sites/6/2020/04/Fundamentals-of-Geographic-Information-System.pdf