cleanData: clean geocode
In daigazi/bamapr:

clean geocode from gaodemap to a list. this list has two dataframe ,one is point data,another is line data.

1 2	cleanData(data = NULL, path, header = F, name = "sanhuang", direction = "nsz", sam = T, npoint = 4, from = 3, to = 5)

`data`	data from the other source(gaodemap)
`path`	data path to read
`header`	logical,read.csv(header=F)
`name`	character,data is road name
`direction`	character,data's direction
`sam`	logical while true,will sample the color of gecodata
`npoint`	numeric sample num
`to`	5 or 6. See more in details.