Kartograph 介绍
Kartograph 是个构建交互式地图的简单、轻量级类库。
它包含两个库，一个用Python写的，用于产生漂亮和压缩的SVG地图，另一个是js类库用于前端展示地图用。
示例代码：
// cities is a list of dictionaries such as
cities = [{ city_name: "Berlin", nb_visits: 1496, lon: 13.4, lat: 52.517 }, ...];
// create a scale for radii
var scale = $K.scale.sqrt(cities, 'nb_visits').range([0, 40]);
// add bubbles to the map
map.addSymbols({
type: $K.Bubble,
data: cities,
location: function(city) {
return [city.lon, city.lat];
},
radius: function(city) {
return scale(city.nb_visits);
},
tooltip: function(city) {
return '<h3>'+city.city_name+'</h3>'+city.nb_visits+' visits';
},
sortBy: 'radius desc',
style: 'fill:#800; stroke: #fff; fill-opacity: 0.5;',
});