June 2017
Beginner
428 pages
10h 2m
English
Content preview from Practical GIS
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Adding attribute data
There are other ways to add or modify attribute data than joining tables together. If we start an edit session, we can directly modify attribute values in the layer's attribute table. It comes in handy when we have to modify the attributes a little bit manually. If manual work is not feasible, we have a convenient tool for creating and filling new columns automatically--the field calculator. We can access this tool from the attribute table of a layer, and from the main toolbar of QGIS by clicking on the abacus icon called Open Field Calculator. In the field calculator, we have a dialog similar to the query builder. We have access to every function that QGIS offers and some other options related to field creation. Let's ...
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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.
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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.