Google Earth Engine
Welcome to Maptime Seattle!
Maptime is a community dedicated to teaching and learning all things geospatial. Maptime offers local mappers the opportunity to learn cutting-edge geospatial technologies.
Maptime’s mission is :
"to open the doors of cartographic possibility to anyone interested by creating a time and space for collaborative learning, exploration, and map creation using mapping tools and technologies."
Earth Engine is a planetary-scale platform for Earth science data & analysis
Remote Sensing Archives
- petabytes of data located on Google servers
- you don’t need to download or extract any data!
Distributed computational power
- CPU clusters provided / limits managed by Google
- data is stored in the cloud
Why use Earth Engine? Because you can! It is powerful allowing you, the analyst/developer, to bring code to the data, which shortens the process of doing exploratory data analysis.
Satellite Imagery Datasets:
- Landsat Archives (4, 5, 7, 8)
- Sentinel 1, 2
- Sea Surface Temperature
variable: stored thing in memory
function: stored operation
asset: geospatial data; e.g. Feature, FeatureCollection / Image, ImageCollection
band: remotely-sensed data stores measured reflectance for different wavelength ranges in separate bands though the spatial resolution and capture time are the same; e.g. Images are composed of bands
reducer: a function which is mapped over all pixels in an Image or ImageCollection: e.g. mean(), median()
By the time we finish this tutorial, you will have the basics to start exploring data with Earth Engine.
What do I need for this tutorial?
If you don’t yet have one, please create a Google account: https://goo.gl/KmaV3j
Sign up for an Earth Engine account using your gmail account: https://goo.gl/qJgvcP
Open an Incognito window of Chrome
Join the MaptimeSEA Earth Engine 101 Google Group with your gmail account: https://goo.gl/TEPFbt
Accept this shared code repository named maptimesea_earthengine101: https://goo.gl/g6xxTT
- The learning curve can be pretty steep. Stay positive. Ask lots of questions.
- Start simple, add complexity piece by piece
- Cannibalize code wherever/whenever you can. The Earth Engine Developer Forum has great examples and includes a lot of code.
What can be done with Earth Engine?
Check out these examples of Earth Engine visualizations and applications: Case Studies
Other Useful Earth Engine tutorials
Remote Sensing of Environment journal: “Google Earth Engine: Planetary-scale geospatial analysis for everyone”
International Research Institute for Climate & Society Health Applications:
Hope that was helpful! Please fill out our survey when you are done even if you couldn’t attend the meeting. We want to make sure the MaptimeSEA tutorials are teaching what you want to learn. bit.ly/maptimesea_survey