.fitExtent() example
From D3 in Depth book by Peter Cook.
Last active
August 2, 2017 11:27
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.fitExtent() example
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| license: gpl-3.0 | |
| height: 480 | |
| border: no |
This file contains hidden or 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.
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <head> | |
| <title>Geo (projection fitExtent)</title> | |
| </head> | |
| <style> | |
| body { | |
| font-family: "Helvetica Neue", Helvetica, sans-serif; | |
| font-size: 14px; | |
| color: #333; | |
| } | |
| canvas { | |
| margin: 10px; | |
| background-color: #eee; | |
| } | |
| </style> | |
| <body> | |
| <div id="content"> | |
| <canvas width="640" height="440"></canvas> | |
| </div> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.9.1/d3.min.js"></script> | |
| <script> | |
| var context = d3.select('#content canvas') | |
| .node() | |
| .getContext('2d'); | |
| var projection = d3.geoEquirectangular(); | |
| var geoGenerator = d3.geoPath() | |
| .projection(projection) | |
| .context(context); | |
| function update(geojson) { | |
| projection.fitExtent([[20, 20], [620, 420]], geojson); | |
| context.lineWidth = 0.5; | |
| context.strokeStyle = '#888'; | |
| context.beginPath(); | |
| geoGenerator({type: 'FeatureCollection', features: geojson.features}) | |
| context.stroke(); | |
| // extent border | |
| context.beginPath(); | |
| context.setLineDash([2, 2]); | |
| context.rect(20, 20, 600, 400); | |
| context.stroke(); | |
| } | |
| // REQUEST DATA | |
| d3.json('https://gist.githubusercontent.com/d3indepth/f28e1c3a99ea6d84986f35ac8646fac7/raw/c58cede8dab4673c91a3db702d50f7447b373d98/ne_110m_land.json', function(err, json) { | |
| update(json) | |
| }) | |
| </script> | |
| </body> | |
| </html> |
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