An example of loading data from a CSV file with D3 and plotting the data as markers on a Leaflet JS map.
Created
June 14, 2016 07:17
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Plotting CSV Map Marker Data.
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license: mit |
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<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta charset="UTF-8"> | |
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/leaflet.css" /> | |
<link rel="stylesheet" href="map.css"> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/leaflet.js"></script> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.min.js" charset="utf-8"></script> | |
<script src="map.js"></script> | |
<title>Plotting CSV Map Marker Data</title> | |
</head> | |
<body onload="showMap()"> | |
<div id="leaflet-map"></div> | |
</body> | |
</html> |
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name | latitude | longitude | |
---|---|---|---|
L'Arc de Triomphe | 48.873747 | 2.294935 | |
Eiffel Tower | 48.858093 | 2.294694 | |
Sacré-Cœur Basilica | 48.886666 | 2.343061 | |
Pont des Arts | 48.858322 | 2.337488 |
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#leaflet-map { | |
width: 962px; | |
height: 502px; | |
} |
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var map = null; | |
var zoomLevel = 13; | |
var paris = new L.LatLng(48.874652, 2.3200449); | |
function showMap() { | |
initMap(); | |
loadCSVData(); | |
} | |
function initMap() { | |
var tileLayer = createTileLayer(); | |
var mapOptions = { | |
center: paris, | |
zoom: zoomLevel, | |
layers: [tileLayer] | |
}; | |
map = new L.Map('leaflet-map', mapOptions); | |
} | |
function createTileLayer() { | |
var tileSourceURL = 'http://{s}.tile.osm.org/{z}/{x}/{y}.png'; | |
var tileSourceOptions = { | |
attribution: '© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors' | |
}; | |
return new L.TileLayer(tileSourceURL, tileSourceOptions); | |
} | |
function loadCSVData() { | |
d3.csv("landmarks.csv", function(data) { | |
data.forEach(function (landmark) { | |
addMarker(landmark); | |
}); | |
}); | |
} | |
function addMarker(landmark) { | |
L.marker([landmark.latitude, landmark.longitude]) | |
.bindPopup(landmark.name) | |
.addTo(map); | |
} |
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