<div id="map" style="height: 100%; width: 100%"></div>

<script src="../../dist/gridviz.js"></script>

<script src="https://cdn.jsdelivr.net/npm/d3-array@3"></script>

<script src="https://cdn.jsdelivr.net/npm/d3-format@3"></script>

<script>

//define map with initial view

const map = new gridviz.Map(document.getElementById('map'), {

x: 4500000,

y: 2900000,

z: 3000,

}).addZoomButtons()

//define dataset

const dataset = new gridviz.MultiResolutionDataset(

[1000, 2000, 5000, 10000, 20000, 50000, 100000],

(resolution) =>

new gridviz.TiledGrid(

map,

'https://raw.githubusercontent.com/jgaffuri/tiledgrids/main/data/europe/population2/' +

resolution +

'm/'

),

{ preprocess: (cell) => +cell.TOT_P_2021 > 0 }

)

//define style

const classNumber = 5

const style = new gridviz.SegmentStyle({

width: (cell, resolution, z, viewScale) => viewScale(cell.TOT_P_2021),

viewScale: gridviz.viewScaleQuantile({

valueFunction: (c) => +c.TOT_P_2021,

classNumber: classNumber,

minSizePix: 1,

maxSizeFactor: 0.8,

}),

orientation: () => 0,

color: () => 'black',

length: (cell, resolution) => resolution,

})

//define legends

style.legends = gridviz.sizeDiscreteViewScaleLegend(classNumber, {

title: 'Population',

shape: 'line',

color: 'black',

length: (resolution) => 2 * resolution,

labelFormat: Math.round,

})

//add layer to map

map.layers = [new gridviz.GridLayer(dataset, [style], { minPixelsPerCell: 6 })]

</script>