Tarsier tutorial: Raster data
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Contents
What are raster data?
Raster data are gridded data such as images and gridded maps of landscape properties such as elevation. The grid is typically two-dimensional, with the dimensions representing coordinates such as latitutde and longitude.
Raster data and vector data are the most fundamental types of data used to represent landscapes.
Examples of raster data include:
- Maps of elevation (digital elevation models, DEMs)
- Maps of bathymetry
- Satellite images
- Aereal photos
- Maps of land cover (also often represented as vector data)
Obtaining raster data
Raster data are widely available on the web. For example, to obtain a digital elevation model for a portion of the USA from the USGS:
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Importing raster data into Tarsier format
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Viewing raster data
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