Applications of passive remote sensing: Remote sensing of ...
Remote Sensing Data — Instant Home Delivery!
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Transcript of Remote Sensing Data — Instant Home Delivery!
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Remote Sensing Data - Instant
Home Delivery
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Landsat (NASA)
Sentinel (ESA)
Planet
UrtheCast
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Who is using satellite imagery?
1. Government
2. Intelligence agencies
3. Environmental
4. Data analytics
5. Agriculture
6. Disaster management
7. Humanitarian
8. Monitoring assets and resources
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Landsat (NASA/USGS) Sentinel 2 (ESA) Planet UrtheCast (Future)
Resolution 15/30/100m 10/20/60m 3-5m* 0.5 - 5 m
Status Free Free Paid Paid
Frequency Monthly Weekly (or better) Daily A few times a day
Compare
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● Landsat (NASA)
● Nexrad (weather)
● NAIP (agriculture)
● Mapzen Terrain Tiles (elevation)
● GDELT (society)
● Sentinel-2 (ESA)
● Many more
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Accessing Satellite Imagery
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Planet
✔ Daily ✔ Paid (California is free) ✔ Medium resolution
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• Access via API key
• Satellite groups
o RapidEye (RE)
o PlanetScope (PS)
o Landsat 8
o Sentinel-2
• Assets
o Visual (RGB24)
o Analytic (RGBNir64)+Red Edge with RE
o UDM (unusable data mask) (bit mask shown as UINT8)
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UDM raster (unusable data mask)
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Planet Reader
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• JSON helpful for advanced queries, e.g. {"type":"AndFilter","config":[{"type":"RangeFilter","field_name":"cloud_cover","config":{"lte":@Evaluate($(CLOUDCOVERAGE)/100)}},{"type":"RangeFilter","field_name":"black_fill","config":{"lte":@Evaluate($(BLACKFILL)/100)}}]}
• First read might take a few minutes, but then it’s cached
• Delivered as GeoTIFF
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Sentinel-2 ✔ Weekly ✔ Free ✔ Medium-low resolution
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Sentinel 2 Bands
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Sentinel-2 on AWS Reader
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Tip: FeatureReader lets you do preprocessing
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Landsat 8 ✔ Monthly ✔ Free ✔ Low resolution
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Landsat 8 Bands
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Landsat 8 Useful Band Combinations
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Landsat on AWS Reader (coming soon!)
Web transformers (for now)
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Example: Landsat Download Assistant Made by FME
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UrtheCast (Coming Soon)
✔ Insanely Frequent ✔ Paid ✔ Insanely High-Res
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Today’s visit
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Today’s visit
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What to do with this imagery
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Examples: Useful Transformations
● Integrate with other sources (maps, 3D models)
● Compare images over time
● Perform raster analysis (e.g. NDVI, feature extraction)
● Live basemap / WMTS
● Add new imagery to database as it becomes available
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Satellite imagery draped over a DEM or LiDAR scan lets you visualize the landscape in 3D.
3D Visualization
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Tip: Publish workspaces to FME Cloud for better performance.
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Over to FME
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3D model with RGB/NIR/NDVI texture
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3D model with RGB/NIR/NDVI texture
Flight over Lower Mainland: https://youtu.be/0m2FVyz5U28
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Landsat (NASA/USGS) Sentinel 2 (ESA) Planet UrtheCast (Future)
Resolution 15/30/100m 10/20/60m 3-5m* 0.5 - 5 m
Status Free Free Paid Paid
Frequency Monthly Weekly (or better) Daily A few times a day
Choices!
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To sum up: Remote Sensing is awesome.
● Lots of options for satellite imagery, depending on your needs.
● Read directly from the cloud and process in FME. ● Use transformers to make basemaps, models, perform
analysis, and more.
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Questions?
Blog: fme.ly/planet
Blog: fme.ly/eo
Tutorials: knowledge.safe.com
Landsat/Sentinel downloader: playground.fmeserver.com