Notebook

Install Earth Engine API and geemap¶

Install the Earth Engine Python API and geemap. The geemap Python package is built upon the ipyleaflet and folium packages and implements several methods for interacting with Earth Engine data layers, such as Map.addLayer(), Map.setCenter(), and Map.centerObject(). The following script checks if the geemap package has been installed. If not, it will install geemap, which automatically installs its dependencies, including earthengine-api, folium, and ipyleaflet.

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# Installs geemap package
import subprocess

try:
    import geemap
except ImportError:
    print('Installing geemap ...')
    subprocess.check_call(["python", '-m', 'pip', 'install', 'geemap'])

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import ee
import geemap

Create an interactive map¶

The default basemap is Google Maps. Additional basemaps can be added using the Map.add_basemap() function.

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Map = geemap.Map(center=[40,-100], zoom=4)
Map

Add Earth Engine Python script¶

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# Add Earth Engine dataset
# Make a date filter to get images in this date range.
dateFilter = ee.Filter.date('2014-01-01', '2014-02-01')

# Load a MODIS collection with EVI data.
mcd43a4 = ee.ImageCollection('MODIS/MCD43A4_006_EVI') \
    .filter(dateFilter)

# Load a MODIS collection with quality data.
mcd43a2 = ee.ImageCollection('MODIS/006/MCD43A2') \
    .filter(dateFilter)

# Define an inner join.
innerJoin = ee.Join.inner()

# Specify an equals filter for image timestamps.
filterTimeEq = ee.Filter.equals(**{
  'leftField': 'system:time_start',
  'rightField': 'system:time_start'
})

# Apply the join.
innerJoinedMODIS = innerJoin.apply(mcd43a4, mcd43a2, filterTimeEq)

# Display the join result: a FeatureCollection.
print('Inner join output:', innerJoinedMODIS)

# Map a function to merge the results in the output FeatureCollection.
joinedMODIS = innerJoinedMODIS.map(lambda feature: ee.Image.cat(feature.get('primary'), feature.get('secondary')))

# Print the result of merging.
print('Inner join, merged bands:', joinedMODIS.getInfo())

Display Earth Engine data layers¶

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Map.addLayerControl() # This line is not needed for ipyleaflet-based Map.
Map