20191107_空間情報システム入門II_GEE_Training

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Transcript

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3. Earth Engine Japan 2018 Nick Clinton Earth Engine Developer Relations https://goo.gl/THU4Y9 ͜ͷࢿྉ͸ɺ3݄ʹ։࠵͞Εͨ Google Earth Engine mini-summit Tokyo 2018Ͱͷ Nick ClintonࢯʢEarth Engine Developer RelationsʣͷࢿྉΛϕʔεʹɺ ࠶ฤूͨ͠΋ͷͰ͢ɻίϯςϯπͷஶ࡞ݖ͸ Nick Clintonࢯ͓Αͼ Googleࣾʹؼଐ͠·͢ɻ
4. Source: NASA
5. "To organize the world's information and make it universally accessible and useful."
 
 ੈքͷ৘ใΛ੔ཧ͠ɺ͍ͭͰ΋Ͳ͜Ͱ΋ΞΫηεՄೳͰ༗༻ͳ΋ͷʹ͢Δɻ https://www.google.com/about/company/ Google Mission Statement
6. -Jim Gray (1944-2007) “Often it turns out to be more efficient to move the questions than to move the data.” σʔλΛҠಈ͢ΔΑΓ΋ɺ
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7. > 17 Petabytes of Earth observation data (imagery, weather, etc.)
8. Google computational infrastructure
9. Powerful JavaScript* API * python too!
11. Before Earth Engine
16. https://earthengine.google.com/timelapse/
18. Data catalog
19. Search!
20. Hot Vegetated Rough
22. https://code.earthengine.google.com/8bdb313355b877fec82283cd89fcd2e2 https://code.earthengine.google.com/8bdb313355b877fec82283cd89fcd2e2
23. How to use Earth Engine
24. Javascript API Interactive Code Editor Node.js* Python API Python module Web Apps with Appengine Jupyter Notebooks* How Do I Use It?
25. On-Demand Computation Batch Computation • Just-in-time map tile rendering • Reduce human time: iterate quickly! • Reduce CPU costs: 
 only compute what you actually need! • Reduce disk costs: 
 only store what you actually need! • Host a “virtual exabyte” of scientific data products 2 Computation Modes
26. • Large-scale computation powered by Flume/MapReduce • Reduce CPU costs: run at batch priority • Reduce serving latency: store all tiles as static resources • Run computations that require analysis of complete data Batch Computation Batch Computation 2 Computation Modes
27. Confidential + Proprietary The Earth Engine Code Editor Your Scripts & Example Scripts API Docs Your Data Search Your Code Data Inspector Batch Tasks Output Console Drawing Tools Map code.earthengine.google.co
28. Geospatial
 Datasets Algorithmic
 Primitives add focal_min filter reduce join distance mosaic convolve Results Storage and Compute Requests
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35. “ALOS” Ͱݕࡧͯ͠ɺALOS DSM: Global 30m Λબ୒ɻ
36. [Import] ϘλϯΛΫϦοΫ
37. ΦϒδΣΫτม਺໊Λ image ͔Β alosdsm ʹมߋ
38. Map.addLayer(alosdsm,{min:0, max:3000},"ALOS DSM”); 1ߦ໨ʹ ҎԼͷMap.addLayer ؔ਺Λ௥Ճ
39. 3VO
41. ֮͑ΔΩʔϫʔυ͸ Map.addLayer
51. Map.addLayer(composite, { bands: ['B6', 'B5', 'B4'], max: [0.3, 0.4, 0.3]}); σϑΥϧτ͸͜ͷόϯυߏ੒ʢφνϡϥϧΧϥʔʣ ͦͷ͋ͱ Run
52. ϦϞʔτηϯγϯάʛJspacesystems ΑΓҾ༻
 http://www.jspacesystems.or.jp/library/remote/
53. Map.addLayer(composite, { bands: ['B4', 'B3', ‘B2'], max: [0.3, 0.4, 0.3]}); τΡϧʔΧϥʔը૾ͷ૊Έ߹Θͤ ͦͷ͋ͱ Run
54. Map.addLayer(composite, { bands: ['B5', 'B4', ‘B3’], max: [0.3, 0.4, 0.3]}); ϑΥʔϧεΧϥʔը૾ͷόϯυߏ੒ ͦͷ͋ͱ Run