18 create landsat timelapse

Uncomment the following line to install geemap if needed.

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# !pip install geemap

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import geemap

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geemap.show_youtube('OwjSJnGWKJs')

Update the geemap package¶

If you run into errors with this notebook, please uncomment the line below to update the geemap package to the latest version from GitHub. Restart the Kernel (Menu -> Kernel -> Restart) to take effect.

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# geemap.update_package()

Create an interactive map¶

Use the Drawing tool to draw a rectangle on the map¶

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Map = geemap.Map()
Map

Generate a Landsat timelapse animation¶

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import os
out_dir = os.path.join(os.path.expanduser("~"), 'Downloads')
if not os.path.exists(out_dir):
    os.makedirs(out_dir)

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label = 'Urban Growth in Las Vegas'
Map.add_landsat_ts_gif(label=label, start_year=1985, bands=['Red', 'Green', 'Blue'], font_color='white', frames_per_second=10, progress_bar_color='blue')

Create Landsat timeseries¶

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import os
import ee
import geemap

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Map = geemap.Map()
Map

You and define an roi or draw a rectangle on the map

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roi = ee.Geometry.Polygon(
    [[[-115.471773, 35.892718],
      [-115.471773, 36.409454],
        [-114.271283, 36.409454],
        [-114.271283, 35.892718],
        [-115.471773, 35.892718]]], None, False)

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# roi = Map.draw_last_feature

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collection = geemap.landsat_timeseries(roi=roi, start_year=1985, end_year=2019, start_date='06-10', end_date='09-20')

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print(collection.size().getInfo())

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first_image = collection.first()

vis = {
    'bands': ['NIR', 'Red', 'Green'],
    'min': 0,
    'max': 4000,
    'gamma': [1, 1, 1]
}

Map.addLayer(first_image, vis, 'First image')

Download ImageCollection as a GIF¶

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# Define arguments for animation function parameters.
video_args = {
  'dimensions': 768,
  'region': roi,
  'framesPerSecond': 10,
  'bands': ['NIR', 'Red', 'Green'],
  'min': 0,
  'max': 4000,
  'gamma': [1, 1, 1]
}

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work_dir = os.path.join(os.path.expanduser("~"), 'Downloads')
if not os.path.exists(work_dir):
    os.makedirs(work_dir)
out_gif = os.path.join(work_dir, "landsat_ts.gif")

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geemap.download_ee_video(collection, video_args, out_gif)

Add animated text to GIF¶

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geemap.show_image(out_gif)

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texted_gif = os.path.join(work_dir, "landsat_ts_text.gif")
geemap.add_text_to_gif(out_gif, texted_gif, xy=('3%', '5%'), text_sequence=1985, font_size=30, font_color='#ffffff', add_progress_bar=False)

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label = 'Urban Growth in Las Vegas'
geemap.add_text_to_gif(texted_gif, texted_gif, xy=('2%', '88%'), text_sequence=label, font_size=30, font_color='#ffffff', progress_bar_color='cyan')

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geemap.show_image(texted_gif)

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Last update: 2021-09-18