Creating a simple map with D3.
Learn more:
Last active
September 25, 2015 23:11
-
-
Save pnavarrc/0f23bd4806fba266159f to your computer and use it in GitHub Desktop.
Simple Map with D3
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> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1"> | |
| <title>Simple Map with D3</title> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js"></script> | |
| </head> | |
| <body> | |
| <style> | |
| body { | |
| margin: 0; | |
| } | |
| svg { | |
| background-color: #A7DBD8; | |
| } | |
| .land { | |
| fill: #E0E4CC; | |
| stroke: #ACAF9F; | |
| stroke-width: 1; | |
| } | |
| </style> | |
| <div id="map-container"></div> | |
| <script> | |
| // Set the dimensions of the map | |
| var width = 960, | |
| height = 480; | |
| // Create a selection for the container div and append the svg element | |
| var div = d3.select('#map-container'), | |
| svg = div.selectAll('svg.map').data([0]); | |
| svg.enter().append('svg') | |
| .classed('map', true); | |
| // Set the size of the SVG element | |
| svg | |
| .attr('width', width) | |
| .attr('height', height); | |
| svg.exit().remove(); | |
| // Retrieve the geographic data asynchronously | |
| d3.json('land.geojson', function(err, data) { | |
| // Throw errors on getting or parsing the file | |
| if (err) { throw err; } | |
| // Create and configure a geographic projection | |
| var projection = d3.geo.equirectangular() | |
| .translate([width / 2, height / 2]) | |
| .scale(width / (2 * Math.PI)); | |
| // Create and configure a path generator | |
| var pathGenerator = d3.geo.path() | |
| .projection(projection); | |
| // Create a selection for the path elements and bind the | |
| // geographic data to the selection | |
| var land = svg.selectAll('path.land').data([data]); | |
| // Append the path element on enter and set its class | |
| land.enter().append('path') | |
| .classed('land', true); | |
| // Use the path generator to convert from GeoJSON to SVG string | |
| land.attr('d', function(d) { return pathGenerator(d); }); | |
| // Remove the path element on exit | |
| land.exit().remove(); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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
| # Download and Transform the 1:50m Country Shapefiles from Natural Earth | |
| # http://www.naturalearthdata.com/downloads/110m-physical-vectors/ | |
| URL = http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/110m/physical/ne_110m_land.zip | |
| # Download the zip file from the Natural Earth server | |
| ne_110m_land.zip: | |
| curl -LO $(URL) | |
| # Unzip the shapefiles | |
| ne_110m_land.shp: ne_110m_land.zip | |
| unzip ne_110m_land.zip | |
| touch ne_110m_land.shp | |
| # Convert the shapefiles to GeoJSON | |
| land.geojson: ne_110m_land.shp | |
| ogr2ogr -f GeoJSON land.geojson ne_110m_land.shp | |
| # Convert the GeoJSON file to TopoJSON | |
| land.topojson: countries.json | |
| topojson -p -o land.topojson land.geojson | |
| # Remove source and temporary files | |
| clean: | |
| rm ne_110m_land* |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment