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QGIS By Example by Daria Svidzinska, Alexander Bruy

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Loading data into QGIS

The data in the GIS can be submitted as separate files, databases, or external online sources. Moreover, there are different data models used in the GIS to represent the geometry of spatial objects. The vector data model is mostly used to express discrete features, such as points (for example, separately growing trees and points of interest), lines (roads or railways), and polygons (buildings or administrative borders). Raster data is convenient for expressing continuous phenomena that are better represented by coverage than by points, lines, or polygons. The most common raster data sources are remote sensing imagery, digital elevation models, and scanned and georeferenced topographic maps.

QGIS uses the GDAL/OGR spatial ...

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