May 2019
Beginner to intermediate
650 pages
14h 50m
English
Content preview from Learn D3.js
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Converting GeoJSON to TopoJSON
Many GIS applications and online tools convert GeoJSON to TopoJSON. MapShaper (mapshaper.org) is very simple to use, and supports big GeoJSON files. You can also install the topojson-server in your computer with NPM:
npm install -g topojson-server
Now you can call the geo2topo command-line application and transform GeoJSON files into TopoJSON. The simplest way to do it is to use:
geo2topo source.geojson –o target.topojson
The transformation can be tuned by applying a quantization parameter. This may be necessary if your input data is messy and there are gaps between adjacent borders. The parameter is a number, usually a power of ten. Very low values will produce a pixelated map. Higher values allow more points ...
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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.