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In this article, the editor introduces in detail "R language leaflet how to achieve thermal density map", the content is detailed, the steps are clear, and the details are handled properly. I hope this "R language leaflet how to achieve thermal density map" article can help you solve your doubts. Let's follow the editor's ideas to learn new knowledge.

Recently in Stack Overflow found a plug-in leaflet package leaflet.esri package, combined with leaflet can provide a very perfect thermal density map solution in R language, immediately feel that the discovery of a new world, immediately share with you the specific implementation ideas.

Library ("leaflet")

Library ("leafletCN")

Library ("leaflet.extras")

Library ("xlsx") mydata%

Na.omit ()

1. The effect of thermal map in default state:

Leaflet (mydata)% >% addTiles ()% >% addHeatmap (lng = ~ lon, lat = ~ lat, radius = 8)

2. Load Amap through addTiles:

Leaflet (mydata)% >% addTiles ('http://webrd02.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=8&x={x}&y={y}&z={z}', options = tileOptions (tileSize=256,minZoom=4,maxZoom=17), attribution=' ©Amap',)% >% addHeatmap (lng = ~ lon, lat = ~ lat, radius = 8)

3. Here, you can use the leafletCN::amap function to simplify Amap's call, which encapsulates the interface of Amap api.

Leaflet (mydata)% >% leafletCN::amap ()% >% addHeatmap (lng = ~ lon, lat = ~ lat, radius = 8)

4. Of course, the call of Tencent Map can also be supported:

Leaflet (mydata)% >% addTiles ('http://rt{s}.map.gtimg.com/realtimerender?z={z}&x={x}&y={y}&type=vector&style=0', options = tileOptions (tms=TRUE, tileSize=256, minZoom=4, maxZoom=17, subdomains= "0123"), attribution =' ©Tencent Map')% >% setView (116.40 zoom = 4)% >% addHeatmap (lng = ~ lon, lat = ~ lat, radius = 8)

In the above parameters, tileSize controls the default explicit map window area, the maximum zoom level of the minZoom code (the larger the scale bar), and the same maxZoom=17 represents the minimum zoom level (the smaller the scale bar).

After reading this, the article "how to achieve thermal density map in R language leaflet" has been introduced. If you want to master the knowledge points of this article, you still need to practice and use it yourself. If you want to know more about related articles, welcome to follow the industry information channel.

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