Shulou(Shulou.com)06/01 Report--

How to analyze leaflet online map? in view of this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

Recently, I dabbled in the leaflet package and suddenly found a new door for dynamic visualization. The map types, dynamic effects and layer display methods provided by this package have greatly expanded the shortcomings of the ggplot mapping system in the data map.

Leaflet is a popular JS open source interactive map package in the industry, which supports direct calls of mainstream map data such as OpenStreetMap, Mapbox, and CartoDB as auxiliary layers for visualization of geographic information data.

In addition to these online map materials, it has good support for map data in shapefile format, json format and spatial data format of sp package. It includes common geographic information visualization graphic elements such as point markers, lines and polygons in the layer function.

The code of this package has good support for the document output system of R language, which can be easily embedded in knitr/rmarkdown documents or seamlessly embedded in the webapp of shiny system.

Next, take the map of China as an example, first make a brief introduction to the types of maps that can be presented and invoked by the map, and the in-depth application of a series of techniques may not be updated until the end of the year.

Library (plyr)

Library (mapdata)

Library (leaflet)

Library (maptools)

Library (ggplot2)

Import geographic information data of provincial capitals in China:

Province_city addProviderTiles ("Esri.WorldTerrain")

Leaflet () > addProviderTiles ("Esri.NatGeoWorldMap")

Leaflet () > addProviderTiles ("Stamen.Toner")

Leaflet () > addProviderTiles ("CartoDB.Positron")

Leaflet () > addProviderTiles ("Stamen.TonerLabels")

This is the answer to the question about how to parse leaflet online map. I hope the above content can be of some help to you. If you still have a lot of doubts to solve, you can follow the industry information channel to learn more about it.

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