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Data Classroom



Data Types and Models
Data for a GIS comes in three basic forms:

Spatial data:
Spatial data, made up of points, lines, and areas, is at the heart of every GIS.

Spatial data forms the locations and shapes of map features such as buildings, streets, or cities.

Tabular data — adding information to maps >>> Tabular data is information describing a map feature. For example, a map of customer locations may be linked to demographic information about those customers. Learn More

Image data—using images to build maps

Image data includes such diverse elements as satellite images, aerial photographs, and scanned data—data that's been converted from paper to digital format. Learn More

In addition, this data can be further classified into two types of data models:

This map shows vector data (the streets) laid on top of raster data (the mountains and valley floor).

Vector data model

Discrete features, such as customer locations and data summarized by area, are usually represented using the vector model. Learn More Raster data model

Continuous numeric values, such as elevation, and continuous categories, such as vegetation types, are represented using the raster model. Learn More

GIS Map 1
Description of the Map

GIS Map 2
Description of the Map

GIS Map 3
Description of the Map
www.rain.org/gis