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Now it is possible to download NDVI and EVI data from Google Earth Engine #42

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merged 2 commits into from
May 19, 2020
Merged

Now it is possible to download NDVI and EVI data from Google Earth Engine #42

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9e75547
Now it is possible to download NDVI and EVI data from Google Earth En…
felipebottega Feb 10, 2020
6456ca9
Merge branch 'master' into master
esloch May 19, 2020
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83 changes: 33 additions & 50 deletions downloader_app/tiff_downloader.py
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Original file line number Diff line number Diff line change
Expand Up @@ -74,7 +74,7 @@ def download_tiffs(source, dates, point1, point2, opt=False):

# Obtains the frequency of source.
freq = source_freq(source)
delta = datetime.timedelta(days=int(freq[0]))
delta = datetime.timedelta(days=freq)

# Download maps by date.
length = len(dates)
Expand Down Expand Up @@ -517,40 +517,34 @@ def single_download_gee(source, date1, date2, x1, x2, y1, y2, opt):
elif source == "CHIRPS":
scale = 5000
CHIRPS = ee.ImageCollection("UCSB-CHG/CHIRPS/PENTAD")
img = (
CHIRPS.filterDate(date1, date2)
.sort("system:time_start", False)
.mean()
.rename("Precipitation")
.set("date", date1)
.set("system:time_start", date1)
)

elif source == "NDVI":
scale = 500
img = CHIRPS.filterDate(date1, date2) \
.sort('system:time_start', False) \
.mean() \
.rename("Precipitation") \
.set('date', date1) \
.set('system:time_start', date1)

elif source == 'NDVI':
scale = 5000
MYD13Q1 = ee.ImageCollection("MODIS/006/MYD13Q1")
img = (
MYD13Q1.filterDate(date1, date2)
.sort("system:time_start", False)
.select(source)
.mean()
.rename(source)
.set("date", date1)
.set("system:time_start", date1)
)

elif source == "EVI":
scale = 500
img = MYD13Q1.filterDate(date1, date2) \
.sort('system:time_start', False) \
.select(source) \
.mean() \
.rename("NDVI") \
.set('date', date1) \
.set('system:time_start', date1)

elif source == 'EVI':
scale = 5000
MYD13Q1 = ee.ImageCollection("MODIS/006/MYD13Q1")
img = (
MYD13Q1.filterDate(date1, date2)
.sort("system:time_start", False)
.select(source)
.mean()
.rename(source)
.set("date", date1)
.set("system:time_start", date1)
)
img = MYD13Q1.filterDate(date1, date2) \
.sort('system:time_start', False) \
.select(source) \
.mean() \
.rename("EVI") \
.set('date', date1) \
.set('system:time_start', date1)

# Prepare parameters.
filename = source + "-" + str(year1) + "-" + str(month1) + "-" + str(day1)
Expand Down Expand Up @@ -946,24 +940,13 @@ def source_freq(source):
"""

if source == "chirps-2.0":
freq = "1D"
freq = 1
elif source == "CHIRPS":
freq = "5D"
elif source in [
"LandDAAC-v5-day",
"LandDAAC-v5-night",
"LST_Day_1km",
"LST_Night_1km",
]:
freq = "8D"
elif source in [
"LandDAAC-v6-EVI",
"LandDAAC-v6-NDVI",
"LandDAAC-v6-view_zenith_angle",
"NDVI",
"EVI",
]:
freq = "16D"
freq = 5
elif source in ["LandDAAC-v5-day", "LandDAAC-v5-night", "LST_Day_1km", "LST_Night_1km"]:
freq = 8
elif source in ["LandDAAC-v6-EVI", "LandDAAC-v6-NDVI", "LandDAAC-v6-view_zenith_angle", "NDVI", "EVI"]:
freq = 16

return freq

Expand Down