Second part of the spam.js choropleth tutorial.
Creating a linear scale with ColorBrewer colors, filling the polygons with the scale according to the data.
Last active
October 28, 2017 13:54
-
-
Save martgnz/1e8b46b772a94c428e78e986c05bd221 to your computer and use it in GitHub Desktop.
Choropleth II
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| license: mit | |
| border: none | |
| height: 1096 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <meta charset="utf-8" /> | |
| <body> | |
| <script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <script src="https://d3js.org/topojson.v1.min.js"></script> | |
| <script src="https://unpkg.com/rbush@1.4.3/rbush.js"></script> | |
| <script src="https://unpkg.com/spamjs@1.1.0/spam.min.js"></script> | |
| <script type='text/javascript'> | |
| var color = d3.scale | |
| .linear() | |
| .domain([0.1, 0.18, 0.26, 0.33, 0.41]) | |
| .range(["#ca0020", "#f4a582", "#f7f7f7", "#92c5de", "#0571b0"]); | |
| d3.json("bcn.json", function(error, d) { | |
| topojson.presimplify(d); | |
| var map = new StaticCanvasMap({ | |
| element: "body", | |
| data: [ | |
| { | |
| features: topojson.feature(d, d.objects["bcn"]), | |
| static: { | |
| paintfeature: function(parameters, d) { | |
| parameters.context.fillStyle = color(d.properties.rate); | |
| parameters.context.fill(); | |
| parameters.context.lineWidth = 0.5; | |
| parameters.context.strokeStyle = "rgba(0,0,0,0.2)"; | |
| parameters.context.stroke(); | |
| } | |
| } | |
| } | |
| ] | |
| }); | |
| map.init(); | |
| }); | |
| </script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment