Planetary-scale geospatial analysis with Google Earth engine

1. Google Earth Engine Workshop
Gennadii Donchyts (Gena), Josh Friedman, Fedor Baart
Google Earth Engine Workshop
Gennadii Donchyts (Gena), Josh Friedman, Fedor Baart

2. LANDSAT mission
Spatial resolution
Temporal resolution
Spectral resolution
Radiometric resolution

3. Colorado River
Iranian Bay
Pacullpa, Peru

4. Water detection using unsupervised classification
SLIC (Simple Linear Iterative Clustering), (Archanta, 2012)

5. Flood Extent Mapping
Focus Area
Mekong river and tributaries from Vientiane, Lao PDR, to
the South China Sea. (With adjustments the tool can easily
be used elsewhere.)
Initial Results
Water detection
Thailand Example: Modified Normalized Difference Index
(8th percentile) over the Landsat 8 period.
This normally represents flood water.
Thailand Example: Modified Normalized Difference Index
(40th percentile) over the Landsat 8 period.
This normally represents permanent water.

6. Coastline Extraction – Zandmotor

7. Area
get cloud-free images
extract boundary
interpolate

8. SRTM 30m

10. •https://ee-api.appspot.com/

11. Get an Image
Pick your: projection, resolution, bands, bounding-box, visualization
Access as: Web map, KML, GeoTIFF
Global-scale Algorithm Processing

12. Get an Image
Apply an algorithm to an image
Library functions or script your own.
Global-scale Algorithm Processing

13. Get an Image
Apply an algorithm to an image
Filter a collection
Time, Space & Metadata search
Global-scale Algorithm Processing

14. Get an Image
Apply an algorithm to an image
Filter a collection
Map an algorithm over a collection
N → N
Global-scale Algorithm Processing

15. Get an Image
Apply an algorithm to an image
Filter a collection
Map an algorithm over a collection
Reduce a collection
N → 1 or N → M
Global-scale Algorithm Processing