May 2016
Beginner to intermediate
446 pages
10h 7m
English
Content preview from Python Geospatial Development - Third EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Summary
In this chapter, we explored the Mapnik map-generation toolkit in depth. We learned that maps are composed of multiple layers, drawn one on top of the other using the painter's algorithm. We saw that each layer has a data source and a list of styles that determine how the data is to be displayed. Styles are referred to by name, so they can be shared between the various map layers.
We learned that each style has a list of rules associated with it, where each rule can optionally have a filter limiting the set of features to be displayed as well as a list of symbolizers that control how the matching features are to be drawn.
We then saw how the mapnik.Map object combines the styles and map layers and how the map can be used to zoom in to a ...
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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.