Picture like this figure (existing data sets)

CodePudding user response:

The drawing difficulty is map the coordinates of each region, in which area the rainfall data you want to paint,

Give you an idea: if you get the data as each region name (for example henan=0.8) :

Division 1, find the official website of the new illustrations, white figure, various administrative areas separated by black lines
2, mining point in each administrative area in legend, namely each administrative region has a relative coordinate
3, 2 points with the actual name of the administrative area, such as henan=10000120, 00
4, rainfall data corresponding to the coordinates, such as henan=0.8, 00 to 10000120=0.8
5, when drawn, according to the coordinates to find the area on the graph, and areas adjacent is not black, with corresponding color fill 0.8