A12g Checkpoint
Import libraries¶
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import ee
import geemap
import ee
import geemap
Create an interactive map¶
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Map = geemap.Map(center=[40, -100], zoom=4)
Map = geemap.Map(center=[40, -100], zoom=4)
Add Earth Engine Python script¶
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# Add Earth Engine dataset
image = ee.Image("USGS/SRTMGL1_003")
#*** Start of imports. If edited, may not auto-convert in the playground. ***#
nbu =
# shown: False #
# displayProperties: [
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
}
] #
ee.FeatureCollection(
[ee.Feature(
ee.Geometry.Polygon(
[[[72.48565466309753, 23.013090225731943],
[72.48565466309753, 23.01218172380882],
[72.4868562927362, 23.01218172380882],
[72.4868562927362, 23.013090225731943]]], None, False),
{
"class": 0,
"system:index": "0"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.48151333237854, 23.0108387097585],
[72.48151333237854, 23.009890691790975],
[72.48273641968933, 23.009890691790975],
[72.48273641968933, 23.0108387097585]]], None, False),
{
"class": 0,
"system:index": "1"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.48265058900085, 23.00720460470793],
[72.48265058900085, 23.006236810228593],
[72.48398096467224, 23.006236810228593],
[72.48398096467224, 23.00720460470793]]], None, False),
{
"class": 0,
"system:index": "2"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.50040144826141, 23.010868335212642],
[72.50040144826141, 23.010379514387374],
[72.50116319562164, 23.010379514387374],
[72.50116319562164, 23.010868335212642]]], None, False),
{
"class": 0,
"system:index": "3"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.49854535962311, 23.009821565220278],
[72.49854535962311, 23.009426555565323],
[72.49904425049988, 23.009426555565323],
[72.49904425049988, 23.009821565220278]]], None, False),
{
"class": 0,
"system:index": "4"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.49695212746826, 23.00991044223325],
[72.49695212746826, 23.00942161793733],
[72.49754757786957, 23.00942161793733],
[72.49754757786957, 23.00991044223325]]], None, False),
{
"class": 0,
"system:index": "5"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.50098740533024, 23.012437718666618],
[72.50098740533024, 23.01211677963381],
[72.501486296207, 23.01211677963381],
[72.501486296207, 23.012437718666618]]], None, False),
{
"class": 0,
"system:index": "6"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.49612187817722, 23.012250092863223],
[72.49612187817722, 23.011953841063395],
[72.49648129418522, 23.011953841063395],
[72.49648129418522, 23.012250092863223]]], None, False),
{
"class": 0,
"system:index": "7"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.49531185105472, 23.011835340161273],
[72.49531185105472, 23.01150946214379],
[72.49571954682499, 23.01150946214379],
[72.49571954682499, 23.011835340161273]]], None, False),
{
"class": 0,
"system:index": "8"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.50769643206644, 23.01452064371778],
[72.50769643206644, 23.014145397644366],
[72.50847963709879, 23.014145397644366],
[72.50847963709879, 23.01452064371778]]], None, False),
{
"class": 0,
"system:index": "9"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.5057974280839, 23.013256652780115],
[72.5057974280839, 23.012486402494627],
[72.50663427729654, 23.012486402494627],
[72.50663427729654, 23.013256652780115]]], None, False),
{
"class": 0,
"system:index": "10"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.5091126384263, 23.013799775337404],
[72.5091126384263, 23.013266527755206],
[72.50970272440958, 23.013266527755206],
[72.50970272440958, 23.013799775337404]]], None, False),
{
"class": 0,
"system:index": "11"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.50782517809915, 23.01674247407806],
[72.50782517809915, 23.01673259935746],
[72.50811485667276, 23.01673259935746],
[72.50811485667276, 23.01674247407806]]], None, False),
{
"class": 0,
"system:index": "12"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.50090507884073, 23.016702975191237],
[72.50090507884073, 23.01607099142841],
[72.50158099551248, 23.01607099142841],
[72.50158099551248, 23.016702975191237]]], None, False),
{
"class": 0,
"system:index": "13"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.49740747828531, 23.016051241888096],
[72.49740747828531, 23.015715499260445],
[72.49777225871134, 23.015715499260445],
[72.49777225871134, 23.016051241888096]]], None, False),
{
"class": 0,
"system:index": "14"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.49698905367899, 23.013394902365846],
[72.49698905367899, 23.012960403190835],
[72.49771861453104, 23.012960403190835],
[72.49771861453104, 23.013394902365846]]], None, False),
{
"class": 0,
"system:index": "15"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.4941459121232, 23.01318752793418],
[72.4941459121232, 23.01289127819304],
[72.49488620181131, 23.01289127819304],
[72.49488620181131, 23.01318752793418]]], None, False),
{
"class": 0,
"system:index": "16"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.51445546856034, 23.025081565200995],
[72.51445546856034, 23.024607607106788],
[72.51517430057633, 23.024607607106788],
[72.51517430057633, 23.025081565200995]]], None, False),
{
"class": 0,
"system:index": "17"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.5175990175258, 23.028952160599992],
[72.5175990175258, 23.028488089974577],
[72.51818910350907, 23.028488089974577],
[72.51818910350907, 23.028952160599992]]], None, False),
{
"class": 0,
"system:index": "18"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.51869335880387, 23.028932412946357],
[72.51869335880387, 23.02818199996423],
[72.5195623945247, 23.02818199996423],
[72.5195623945247, 23.028932412946357]]], None, False),
{
"class": 0,
"system:index": "19"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.52084471850465, 23.026596214980795],
[72.52084471850465, 23.02604326992137],
[72.52137043147157, 23.02604326992137],
[72.52137043147157, 23.026596214980795]]], None, False),
{
"class": 0,
"system:index": "20"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.53553214246043, 23.03997960346422],
[72.53553214246043, 23.03879483608005],
[72.53699126416453, 23.03879483608005],
[72.53699126416453, 23.03997960346422]]], None, False),
{
"class": 0,
"system:index": "21"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.52233567410715, 23.044086716392354],
[72.52233567410715, 23.0435535886138],
[72.5232798116804, 23.0435535886138],
[72.5232798116804, 23.044086716392354]]], None, False),
{
"class": 0,
"system:index": "22"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.52499642544993, 23.043198168922416],
[72.52499642544993, 23.04248732672617],
[72.52587619000681, 23.04248732672617],
[72.52587619000681, 23.043198168922416]]], None, False),
{
"class": 0,
"system:index": "23"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.52400937253245, 23.04181597231865],
[72.52400937253245, 23.040986647548742],
[72.52491059476145, 23.040986647548742],
[72.52491059476145, 23.04181597231865]]], None, False),
{
"class": 0,
"system:index": "24"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.57306172713966, 23.03598378282248],
[72.57306172713966, 23.034562018547053],
[72.57426335677833, 23.034562018547053],
[72.57426335677833, 23.03598378282248]]], None, False),
{
"class": 0,
"system:index": "25"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.57566066969198, 23.052508342763684],
[72.57566066969198, 23.050928797545748],
[72.57720562208456, 23.050928797545748],
[72.57720562208456, 23.052508342763684]]], None, False),
{
"class": 0,
"system:index": "26"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.5743302940206, 23.02486362694267],
[72.5743302940206, 23.023323254554423],
[72.57561775434775, 23.023323254554423],
[72.57561775434775, 23.02486362694267]]], None, False),
{
"class": 0,
"system:index": "27"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.68683489184394, 23.01212531748654],
[72.68683489184394, 23.010910679849328],
[72.68822964053169, 23.010910679849328],
[72.68822964053169, 23.01212531748654]]], None, False),
{
"class": 0,
"system:index": "28"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.69045050959602, 23.01332019424718],
[72.69045050959602, 23.012174692768948],
[72.69152339320198, 23.012174692768948],
[72.69152339320198, 23.01332019424718]]], None, False),
{
"class": 0,
"system:index": "29"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.6833158336164, 23.01301406980455],
[72.6833158336164, 23.012233943083956],
[72.68446381907478, 23.012233943083956],
[72.68446381907478, 23.01301406980455]]], None, False),
{
"class": 0,
"system:index": "30"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.67707165102973, 23.01268819463449],
[72.67707165102973, 23.0117796900038],
[72.67849858622566, 23.0117796900038],
[72.67849858622566, 23.01268819463449]]], None, False),
{
"class": 0,
"system:index": "31"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.67816599230781, 23.014544685070533],
[72.67816599230781, 23.01347819368771],
[72.67923887591377, 23.01347819368771],
[72.67923887591377, 23.014544685070533]]], None, False),
{
"class": 0,
"system:index": "32"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.6903217635633, 23.016075282967993],
[72.6903217635633, 23.015413671814553],
[72.69105132441535, 23.015413671814553],
[72.69105132441535, 23.016075282967993]]], None, False),
{
"class": 0,
"system:index": "33"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.68663104395881, 23.015630917625792],
[72.68663104395881, 23.014890305468796],
[72.68773611407295, 23.014890305468796],
[72.68773611407295, 23.015630917625792]]], None, False),
{
"class": 0,
"system:index": "34"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.71553840093799, 23.017830754660782],
[72.71553840093799, 23.016606293669707],
[72.71675075941272, 23.016606293669707],
[72.71675075941272, 23.017830754660782]]], None, False),
{
"class": 0,
"system:index": "35"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.71506633215137, 23.01600393378011],
[72.71506633215137, 23.01512507600062],
[72.7161714022655, 23.01512507600062],
[72.7161714022655, 23.01600393378011]]], None, False),
{
"class": 0,
"system:index": "36"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.71916474752612, 23.017870253217335],
[72.71916474752612, 23.01693215937388],
[72.72010888509936, 23.01693215937388],
[72.72010888509936, 23.017870253217335]]], None, False),
{
"class": 0,
"system:index": "37"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.70868267469592, 23.018521977730355],
[72.70868267469592, 23.01767276031886],
[72.70984138899036, 23.01767276031886],
[72.70984138899036, 23.018521977730355]]], None, False),
{
"class": 0,
"system:index": "38"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.7059039061565, 23.015302822979788],
[72.7059039061565, 23.014473335073],
[72.70708407812305, 23.014473335073],
[72.70708407812305, 23.015302822979788]]], None, False),
{
"class": 0,
"system:index": "39"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.64443317494984, 22.995586380713714],
[72.64443317494984, 22.994895040144375],
[72.6453451260149, 22.994895040144375],
[72.6453451260149, 22.995586380713714]]], None, False),
{
"class": 0,
"system:index": "40"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.6488749130785, 22.99306790874182],
[72.6488749130785, 22.992317296243893],
[72.64966884694691, 22.992317296243893],
[72.64966884694691, 22.99306790874182]]], None, False),
{
"class": 0,
"system:index": "41"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.64429370008106, 22.992188901582924],
[72.64429370008106, 22.991566679573463],
[72.6448945149004, 22.991566679573463],
[72.6448945149004, 22.992188901582924]]], None, False),
{
"class": 0,
"system:index": "42"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.65110651097889, 22.996988803565362],
[72.65110651097889, 22.99634685125117],
[72.65186825833912, 22.99634685125117],
[72.65186825833912, 22.996988803565362]]], None, False),
{
"class": 0,
"system:index": "43"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.650044356209, 22.99654437536528],
[72.650044356209, 22.995872792198217],
[72.65091339192982, 22.995872792198217],
[72.65091339192982, 22.99654437536528]]], None, False),
{
"class": 0,
"system:index": "44"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.65456119619007, 22.997166574435727],
[72.65456119619007, 22.996574003957473],
[72.65529075704212, 22.996574003957473],
[72.65529075704212, 22.997166574435727]]], None, False),
{
"class": 0,
"system:index": "45"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.58544230346283, 22.989353118858265],
[72.58544230346283, 22.987812341050095],
[72.58773827437957, 22.987812341050095],
[72.58773827437957, 22.989353118858265]]], None, False),
{
"class": 0,
"system:index": "46"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.61881659486005, 23.010174527999478],
[72.61881659486005, 23.009621515605502],
[72.61955688454816, 23.009621515605502],
[72.61955688454816, 23.010174527999478]]], None, False),
{
"class": 0,
"system:index": "47"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.61806557633588, 23.008890745751035],
[72.61806557633588, 23.008150096589624],
[72.6190419004173, 23.008150096589624],
[72.6190419004173, 23.008890745751035]]], None, False),
{
"class": 0,
"system:index": "48"
}),
ee.Feature(
ee.Geometry.Polygon(
[[[72.61948212543246, 23.041104493489044],
[72.61948212543246, 23.039919735997568],
[72.6207695857596, 23.039919735997568],
[72.6207695857596, 23.041104493489044]]], None, False),
{
"class": 0,
"system:index": "49"
})]),
bu =
# displayProperties: [
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
}
] #
ee.FeatureCollection(
[ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
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ee.Feature(
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ee.Feature(
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ee.Feature(
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ee.Feature(
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L7 = ee.ImageCollection("LANDSAT/LE07/C02/T1_L2")
#**** End of imports. If edited, may not auto-convert in the playground. ****#
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Chapter: A1.2 Urban Environments
# Checkpoint: A12g
# Authors: Michelle Stuhlmacher and Ran Goldblatt
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Map.centerObject(bu, 13)
# Surface reflectance function from example:
def maskL457sr(image):
qaMask = image.select('QA_PIXEL').bitwiseAnd(parseInt('11111',
2)).eq(0)
saturationMask = image.select('QA_RADSAT').eq(0)
# Apply the scaling factors to the appropriate bands.
opticalBands = image.select('SR_B.').multiply(0.0000275).add(-
0.2)
thermalBand = image.select('ST_B6').multiply(0.00341802).add(
149.0)
# Replace the original bands with the scaled ones and apply the masks.
return image.addBands(opticalBands, None, True) \
.addBands(thermalBand, None, True) \
.updateMask(qaMask) \
.updateMask(saturationMask)
# Map the function over one year of data.
collection = L7.filterDate('2020-01-01', '2021-01-01').map(
maskL457sr)
landsat7_2020 = collection.median()
Map.addLayer(landsat7_2020, {
'bands': ['SR_B3', 'SR_B2', 'SR_B1'],
'min': 0,
'max': 0.3
}, 'landsat 7, 2020')
# -----------------------------------------------------------------------
# CHECKPOINT
# -----------------------------------------------------------------------
lc = nbu.merge(bu)
# -----------------------------------------------------------------------
# CHECKPOINT
# -----------------------------------------------------------------------
bands = ['SR_B1', 'SR_B2', 'SR_B3', 'SR_B4', 'SR_B5', 'ST_B6',
'SR_B7'
]
training = landsat7_2020.select(bands).sampleRegions({
'collection': lc,
'properties': ['class'],
'scale': 30
})
# Create a random forest classifier with 20 trees.
classifier = ee.Classifier.smileRandomForest({
'numberOfTrees': 20
}).train({ # Train the classifier.
# Use the examples we got when we sampled the pixels.
'features': training,
# This is the class that we want to predict.
'classProperty': 'class',
# The bands the classifier will use for training and classification.
'inputProperties': bands
})
# Apply the classifier on the 2020 image.
classified20 = landsat7_2020.select(bands).classify(classifier)
Map.addLayer(classified20.mask(classified20), {
'palette': ['#ff4218'],
'opacity': 0.6
}, 'built-up, 2020')
# -----------------------------------------------------------------------
# CHECKPOINT
# -----------------------------------------------------------------------
# Add Earth Engine dataset
image = ee.Image("USGS/SRTMGL1_003")
#*** Start of imports. If edited, may not auto-convert in the playground. ***#
nbu =
# shown: False #
# displayProperties: [
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
}
] #
ee.FeatureCollection(
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ee.Feature(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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[72.6207695857596, 23.041104493489044]]], None, False),
{
"class": 0,
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bu =
# displayProperties: [
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
},
{
"type": "rectangle"
}
] #
ee.FeatureCollection(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
"class": 1,
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ee.Feature(
ee.Geometry.Polygon(
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{
"class": 1,
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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{
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ee.Feature(
ee.Geometry.Polygon(
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L7 = ee.ImageCollection("LANDSAT/LE07/C02/T1_L2")
#**** End of imports. If edited, may not auto-convert in the playground. ****#
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Chapter: A1.2 Urban Environments
# Checkpoint: A12g
# Authors: Michelle Stuhlmacher and Ran Goldblatt
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Map.centerObject(bu, 13)
# Surface reflectance function from example:
def maskL457sr(image):
qaMask = image.select('QA_PIXEL').bitwiseAnd(parseInt('11111',
2)).eq(0)
saturationMask = image.select('QA_RADSAT').eq(0)
# Apply the scaling factors to the appropriate bands.
opticalBands = image.select('SR_B.').multiply(0.0000275).add(-
0.2)
thermalBand = image.select('ST_B6').multiply(0.00341802).add(
149.0)
# Replace the original bands with the scaled ones and apply the masks.
return image.addBands(opticalBands, None, True) \
.addBands(thermalBand, None, True) \
.updateMask(qaMask) \
.updateMask(saturationMask)
# Map the function over one year of data.
collection = L7.filterDate('2020-01-01', '2021-01-01').map(
maskL457sr)
landsat7_2020 = collection.median()
Map.addLayer(landsat7_2020, {
'bands': ['SR_B3', 'SR_B2', 'SR_B1'],
'min': 0,
'max': 0.3
}, 'landsat 7, 2020')
# -----------------------------------------------------------------------
# CHECKPOINT
# -----------------------------------------------------------------------
lc = nbu.merge(bu)
# -----------------------------------------------------------------------
# CHECKPOINT
# -----------------------------------------------------------------------
bands = ['SR_B1', 'SR_B2', 'SR_B3', 'SR_B4', 'SR_B5', 'ST_B6',
'SR_B7'
]
training = landsat7_2020.select(bands).sampleRegions({
'collection': lc,
'properties': ['class'],
'scale': 30
})
# Create a random forest classifier with 20 trees.
classifier = ee.Classifier.smileRandomForest({
'numberOfTrees': 20
}).train({ # Train the classifier.
# Use the examples we got when we sampled the pixels.
'features': training,
# This is the class that we want to predict.
'classProperty': 'class',
# The bands the classifier will use for training and classification.
'inputProperties': bands
})
# Apply the classifier on the 2020 image.
classified20 = landsat7_2020.select(bands).classify(classifier)
Map.addLayer(classified20.mask(classified20), {
'palette': ['#ff4218'],
'opacity': 0.6
}, 'built-up, 2020')
# -----------------------------------------------------------------------
# CHECKPOINT
# -----------------------------------------------------------------------
Display the interactive map¶
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