Mosaicking the Earth every day
summary
Planet images most of the land every day with about 140 satellites after an 88‑satellite PSLV launch and now brings down 150 million square kilometers per day into a pipeline built on GDAL and Python (C/C++ for heavy work) that processes terabytes daily and archives petabytes. Global mosaics are assembled by selecting cloud‑free scenes, applying color normalization beyond naive histogram matching, and removing seams with gradient blending. Monthly, weekly and moving‑toward daily 5‑meter mosaics exist and the methods are operational.
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chapters (17)
- 0:00Planet Labs and daily imaging
- 3:19Growth in Earth imaging capacity
- 6:34Record satellite deployment Feb 2017
- 9:02Multispectral satellite imagery
- 10:28Recent Earth observation examples
- 12:20Raw images to global maps
- 14:10Open-source mosaic tools
- 16:01Cloud-free mosaic challenges
- 18:49Color normalization methods
- 21:43Histogram matching for color balancing
- 23:31Gradient blending for seams
- 23:53Global summer base map stats
- 25:28Monthly global mosaics 2016-2017
- 27:41Progress to weekly mosaics
- 29:07Future daily dynamic mosaics
- 30:31Access Planet’s data products
- 32:43Q&A
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