#GIS

有时,我们无法直接获取某些地理数据的精确位置信息,仅能从网络中下载他人的地图作品。因而,我请教了一名规划师同学,参考网络图像,通过适配地理范围,手工获取其实际地理属性。本文以我国集中采暖南北分界线的绘制为例,简述QGIS软件的具体实现步骤。

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Sometimes, we need to clip or extract the raster image with polygon features, e.g., only focus on the percipitation within China using global dataset. This post will introduce two methods to mask the 2-d array-like dataset by a specific geometry using Python.

  • The first method use GeoPandas module to test those raster coordidnates within/out of the shapefile
  • The second method which I strongly recommended with faster speed was based on shapely module.

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