[data visualization] antv L7 realizes map visualization, drilldownlayer drill asynchronously obtains data, and suspends the warning box

China map display demo as follows ：

One 、 Use of drill through maps

Drill through maps support two types of Visualization

• Fill in the picture ： Show each area on the map , Set the block fill color according to the area value
• Bubble chart ： Each area is displayed with bubbles , Set the color and size of the bubble according to the area value

1） Constructors

• scene L7 scene object
• option Administrative division configuration item
• drillDepth number Running depth 0 | 1 | 2 1 Municipal level 2, county-level
• customTrigger Whether to customize the tripping interaction , Default false
• drillDownTriggerEvent Trigger event for drill down customTrigger by true It doesn't work
• drillUpTriggleEvent Trigger event for drill up customTrigger by true It doesn't work
• provinceData Provincial Data
• cityData Municipal data It can be full data , There is no need to reset the data when tripping in
• countyData County level data It can be full data , There is no need to reset the data when tripping in
• joinBy Data Association , How attribute data is bound by internal spatial data association At present, we support NAME_CHN,adcode Field connection cross reference table Array [string, string] The first value is the number of spaces