2.3 Data sources
The data of land use type in 2017 was 10-m resolution and got fromhttp://data.ess.tsinghua.edu.cn/,
which was 72.76% in overall accuracy (Gong et al., 2019). The land use
types were classified into
cropland, forest, grassland,
shrubland, wetland, water body, tundra, impervious area, bare land, and
snow/ice (Gong et al., 2019).
The position data about road, place and waterway were got form
Openstreetmap
(https://www.openstreetmap.org/).
In this website, the roads were classified into trunk road, primary
road, secondary road, tertiary road, residential road, cycleway, footway
and so on
(http://wiki.openstreetmap.org/wiki/Key:highway).
The places were classified into country, province, county, town, village
and so on
(https://wiki.openstreetmap.org/wiki/Key:place).
The waterway were classified into river, stream, drain, ditch and so on
(https://wiki.openstreetmap.org/wiki/Key:waterway).