The dataset is an estimated aridity grid with a spatial resolution of 10 arc minutes. This dataset represents the average annual precipitation divided by the average annual potential evapotranspiration, and is a drought index defined by the United Nations Environment Programme (UNEP). Obtain drought data in the Heilongjiang River Basin through clipping. Data source（ https://data.apps.fao.org/map/catalog/srv/eng/catalog.search#/metadata/221072ae -2090-48a1-be6f-5a88f061431a), the spatial coordinate system is WGS 84.
中心点纬度：48.83343
中心点经度：124.416916
最大缩放级别：10
最小缩放级别：1
Current zoom level：5