Uncomment the following line to install geemap if needed.

In [1]:

# !pip install geemap

# !pip install geemap

Interactive extraction of pixel values and interactive region reduction¶

Interactive extraction of pixel values¶

Import libraries¶

In [2]:

import os
import ee
import geemap

import os import ee import geemap

Create an interactive map¶

In [3]:

Map = geemap.Map()
Map

Map = geemap.Map() Map

Out[3]:

Make this Notebook Trusted to load map: File -> Trust Notebook

Add data to the map¶

In [4]:

landsat7 = ee.Image('LE7_TOA_5YEAR/1999_2003').select([0, 1, 2, 3, 4, 6])
landsat_vis = {'bands': ['B4', 'B3', 'B2'], 'gamma': 1.4}
Map.addLayer(landsat7, landsat_vis, "LE7_TOA_5YEAR/1999_2003")

Map.set_plot_options(add_marker_cluster=True)

landsat7 = ee.Image('LE7_TOA_5YEAR/1999_2003').select([0, 1, 2, 3, 4, 6]) landsat_vis = {'bands': ['B4', 'B3', 'B2'], 'gamma': 1.4} Map.addLayer(landsat7, landsat_vis, "LE7_TOA_5YEAR/1999_2003") Map.set_plot_options(add_marker_cluster=True)

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Input In [4], in <cell line: 5>()
      2 landsat_vis = {'bands': ['B4', 'B3', 'B2'], 'gamma': 1.4}
      3 Map.addLayer(landsat7, landsat_vis, "LE7_TOA_5YEAR/1999_2003")
----> 5 Map.set_plot_options(add_marker_cluster=True)

AttributeError: 'Map' object has no attribute 'set_plot_options'

Activate the plotting tool¶

Tick the Plotting checkbox and click the mouse on the map to start displaying charts.

Export pixel values to shapefile/csv¶

In [5]:

out_dir = os.path.join(os.path.expanduser('~'), 'Downloads')
# out_csv = os.path.join(out_dir, 'points.csv')
out_shp = os.path.join(out_dir, 'points.shp')

out_dir = os.path.join(os.path.expanduser('~'), 'Downloads') # out_csv = os.path.join(out_dir, 'points.csv') out_shp = os.path.join(out_dir, 'points.shp')

In [6]:

Map.extract_values_to_points(out_shp)

Map.extract_values_to_points(out_shp)

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Input In [6], in <cell line: 1>()
----> 1 Map.extract_values_to_points(out_shp)

AttributeError: 'Map' object has no attribute 'extract_values_to_points'

Interactive Region Reduction¶

Import libraries¶

In [7]:

import os
import ee
import geemap

import os import ee import geemap

Create an interactive map¶

In [8]:

m = geemap.Map()

m = geemap.Map()

Add add to the map¶

In [9]:

collection = (
    ee.ImageCollection('MODIS/006/MOD13A2')
    .filterDate('2015-01-01', '2019-12-31')
    .select('NDVI')
)

# Convert the image collection to an image.
image = collection.toBands()

ndvi_vis = {
    'min': 0.0,
    'max': 9000.0,
    'palette': [
        'FFFFFF',
        'CE7E45',
        'DF923D',
        'F1B555',
        'FCD163',
        '99B718',
        '74A901',
        '66A000',
        '529400',
        '3E8601',
        '207401',
        '056201',
        '004C00',
        '023B01',
        '012E01',
        '011D01',
        '011301',
    ],
}

m.addLayer(image, {}, 'MODIS NDVI Time-series')
m.addLayer(image.select(0), ndvi_vis, 'MODIS NDVI VIS')

m

collection = ( ee.ImageCollection('MODIS/006/MOD13A2') .filterDate('2015-01-01', '2019-12-31') .select('NDVI') ) # Convert the image collection to an image. image = collection.toBands() ndvi_vis = { 'min': 0.0, 'max': 9000.0, 'palette': [ 'FFFFFF', 'CE7E45', 'DF923D', 'F1B555', 'FCD163', '99B718', '74A901', '66A000', '529400', '3E8601', '207401', '056201', '004C00', '023B01', '012E01', '011D01', '011301', ], } m.addLayer(image, {}, 'MODIS NDVI Time-series') m.addLayer(image.select(0), ndvi_vis, 'MODIS NDVI VIS') m

Out[9]:

Make this Notebook Trusted to load map: File -> Trust Notebook

Set reducer¶

In [10]:

m.set_plot_options(add_marker_cluster=True, marker=None)
m.roi_reducer = ee.Reducer.mean()

m.set_plot_options(add_marker_cluster=True, marker=None) m.roi_reducer = ee.Reducer.mean()

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Input In [10], in <cell line: 1>()
----> 1 m.set_plot_options(add_marker_cluster=True, marker=None)
      2 m.roi_reducer = ee.Reducer.mean()

AttributeError: 'Map' object has no attribute 'set_plot_options'

Export data¶

In [11]:

out_dir = os.path.join(os.path.expanduser('~'), 'Downloads')
# out_csv = os.path.join(out_dir, 'points.csv')
out_shp = os.path.join(out_dir, 'ndvi.shp')
m.extract_values_to_points(out_shp)

out_dir = os.path.join(os.path.expanduser('~'), 'Downloads') # out_csv = os.path.join(out_dir, 'points.csv') out_shp = os.path.join(out_dir, 'ndvi.shp') m.extract_values_to_points(out_shp)

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Input In [11], in <cell line: 4>()
      2 # out_csv = os.path.join(out_dir, 'points.csv')
      3 out_shp = os.path.join(out_dir, 'ndvi.shp')
----> 4 m.extract_values_to_points(out_shp)

AttributeError: 'Map' object has no attribute 'extract_values_to_points'

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Last update: 2022-03-14