MalaGIS

Sharing GIS Technologies, Resources and News.

Many GIS students inadvertently purchase MacBook only to discover that ArcGIS and most domestic GIS software lack macOS versions. This article summarizes solutions for running ArcGIS on M1 Macs. Better approaches are welcome in the comments.

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Yesterday in a technical group, an interesting question arose: How does Leaflet's official website achieve its smooth leaf logo color transition? While initially assuming it was a GIF animation, closer inspection revealed a more elegant solution.

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Air quality monitoring typically generates hourly or daily data, while environmental remote sensing research often requires long-term data aggregation and comparison. This guide provides a programming-free method for researchers to efficiently consolidate and analyze such datasets.

Data Acquisition

Hourly air quality data (AQI, PM~2.5~, PM~10~, SO~2~, NO~2~, O~3~, CO) is available from Wang Xiaolei's authoritative platform:
https://quotsoft.net/air/

Dataset Coverage:

• National monitoring stations (~1,600 sites, primarily urban)

• Beijing municipal stations (35 sites across categories):

  • Urban environmental assessment (12)
  • Suburban environmental assessment (10)
  • Reference/regional sites (7)
  • Traffic pollution monitors (5)

National station distribution

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