September 2016
Beginner to intermediate
486 pages
10h 56m
English
book
Mastering QGIS - Second Edition
by Kurt Menke, GISP, Paolo Corti, Richard Smith Jr., GISP, Luigi Pirelli, John Van Hoesen, GISP
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Converting between raster and vector data models
QGIS provides tools to convert between raster and vector data models. In this section, we will convert between the two data models using a national land cover dataset of 2006 for the Dallas area in Texas.
Converting from raster to vector
To convert a raster to a vector format, QGIS provides the Polygonize tool. The Polygonize tool converts an input raster file into any supported type of vector file and writes the raster cell values to a field in the vector file. When the raster is polygonized, adjacent cells of the same value are aggregated to a single larger polygon.
To access the Polygonize tool, click on Polygonize (Raster to vector) by navigating to Raster | Conversion. The Polygonize tool is shown ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.