June 2017
Beginner
428 pages
10h 2m
English
Content preview from Practical GIS
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Spatial querying
We can not only select features by their attributes, but also by their spatial relationships. These queries are called spatial queries, or selecting features by their location. With this type of querying, we can select features intersecting or touching other features in other layers. The most convenient mode of spatial querying allows us to consider two layers at a time, and select features from one layer with respect to the locations of features in the other one. First of all, let's remove the filter from our GeoNames layer. Next, to access the spatial query tool in QGIS, we have to browse our Processing Toolbox. From QGIS geoalgorithms, we have to access Vector selection tools and open the Select by location tool:
If you ...
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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.
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.