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Leaflet.js Essentials
book

Leaflet.js Essentials

by Paul Crickard III
August 2014
Intermediate to advanced content levelIntermediate to advanced
180 pages
3h 41m
English
Packt Publishing
Content preview from Leaflet.js Essentials

Creating a choropleth map with Leaflet

In the previous examples, you used heatmaps to color code a map based on the density or intensity of points. A choropleth map also measures the intensity or density of a statistical variable but within polygons. A popular choropleth map is the population density by county. Choropleth maps do not require any plugins, as was the case with the heatmap examples. A choropleth map is usually created by styling GeoJSON based on a property.

The GeoJSON data

When adding a large amount of GeoJSON data to a map, it is easier to place the code in a separate JavaScript file. This clears your HTML file of hundreds of lines of code, which makes it hard to focus on building the map. When you place the GeoJSON code in a JavaScript ...

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Publisher Resources

ISBN: 9781783554812Supplemental Content