| 1 |
f5ef0596
|
Adam M. Wilson
|
#!/usr/bin/env python
|
| 2 |
|
|
|
| 3 |
58d05081
|
Adam M. Wilson
|
## Example script that downloads data from Google Earth Engine using the python API
|
| 4 |
|
|
## MODIS MOD09GA data is processed to extract the MOD09 cloud flag and calculate monthly cloud frequency
|
| 5 |
|
|
|
| 6 |
|
|
|
| 7 |
|
|
## import some libraries
|
| 8 |
|
|
import ee
|
| 9 |
|
|
from ee import mapclient
|
| 10 |
|
|
import ee.mapclient
|
| 11 |
|
|
import datetime
|
| 12 |
|
|
import wget
|
| 13 |
|
|
import os
|
| 14 |
f5ef0596
|
Adam M. Wilson
|
import sys
|
| 15 |
15936a3e
|
Adam M. Wilson
|
from subprocess import call
|
| 16 |
58d05081
|
Adam M. Wilson
|
|
| 17 |
f5ef0596
|
Adam M. Wilson
|
import logging
|
| 18 |
|
|
logging.basicConfig(filename='error.log',level=logging.DEBUG)
|
| 19 |
|
|
|
| 20 |
|
|
def Usage():
|
| 21 |
|
|
print('Usage: ee.MOD9.py -projwin ulx uly lrx lry -year year -month month -regionname 1')
|
| 22 |
|
|
sys.exit( 1 )
|
| 23 |
|
|
|
| 24 |
|
|
ulx = float(sys.argv[2])
|
| 25 |
|
|
uly = float(sys.argv[3])
|
| 26 |
|
|
lrx = float(sys.argv[4])
|
| 27 |
|
|
lry = float(sys.argv[5])
|
| 28 |
|
|
year = int(sys.argv[7])
|
| 29 |
|
|
month = int(sys.argv[9])
|
| 30 |
|
|
regionname = str(sys.argv[11])
|
| 31 |
|
|
|
| 32 |
|
|
#```
|
| 33 |
|
|
#ulx=-159
|
| 34 |
|
|
#uly=20
|
| 35 |
|
|
#lrx=-154.5
|
| 36 |
|
|
#lry=18.5
|
| 37 |
|
|
#year=2001
|
| 38 |
|
|
#month=6
|
| 39 |
|
|
#```
|
| 40 |
|
|
## Define output filename
|
| 41 |
|
|
output=regionname+'_'+str(year)+'_'+str(month)
|
| 42 |
58d05081
|
Adam M. Wilson
|
|
| 43 |
|
|
## set working directory (where files will be downloaded)
|
| 44 |
d7dc526e
|
Adam M. Wilson
|
os.chdir('/mnt/data2/projects/cloud/mod09')
|
| 45 |
58d05081
|
Adam M. Wilson
|
|
| 46 |
15936a3e
|
Adam M. Wilson
|
MY_SERVICE_ACCOUNT = '511722844190@developer.gserviceaccount.com' # replace with your service account
|
| 47 |
|
|
MY_PRIVATE_KEY_FILE = '/home/adamw/EarthEngine-privatekey.p12' # replace with you private key file path
|
| 48 |
58d05081
|
Adam M. Wilson
|
|
| 49 |
|
|
ee.Initialize(ee.ServiceAccountCredentials(MY_SERVICE_ACCOUNT, MY_PRIVATE_KEY_FILE))
|
| 50 |
|
|
|
| 51 |
|
|
## set map center to speed up viewing
|
| 52 |
15936a3e
|
Adam M. Wilson
|
#ee.mapclient.centerMap(-121.767, 46.852, 11)
|
| 53 |
58d05081
|
Adam M. Wilson
|
|
| 54 |
|
|
#///////////////////////////////////
|
| 55 |
|
|
#// Function to extract cloud flags
|
| 56 |
bce95cb5
|
Adam M. Wilson
|
def getmod09(img): return(img.select(['state_1km']).expression("((b(0)/1024)%2)>0.5"));
|
| 57 |
|
|
# added the >0.5 because some values are coming out >1. Need to look into this further as they should be bounded 0-1...
|
| 58 |
|
|
|
| 59 |
58d05081
|
Adam M. Wilson
|
#////////////////////////////////////////////////////
|
| 60 |
15936a3e
|
Adam M. Wilson
|
|
| 61 |
|
|
# output filename
|
| 62 |
f5ef0596
|
Adam M. Wilson
|
unzippedfilename=output+".mod09.tif"
|
| 63 |
15936a3e
|
Adam M. Wilson
|
|
| 64 |
|
|
# Check if file already exists and continue if so...
|
| 65 |
f5ef0596
|
Adam M. Wilson
|
if(os.path.exists(unzippedfilename)):
|
| 66 |
|
|
sys.exit("File exists:"+output)
|
| 67 |
15936a3e
|
Adam M. Wilson
|
|
| 68 |
f5ef0596
|
Adam M. Wilson
|
|
| 69 |
|
|
#####################################################
|
| 70 |
|
|
# Processing Function
|
| 71 |
|
|
# MOD09 internal cloud flag for this year-month
|
| 72 |
15936a3e
|
Adam M. Wilson
|
# to filter by a date range: filterDate(datetime.datetime(yearstart,monthstart,1),datetime.datetime(yearstop,monthstop,31))
|
| 73 |
f5ef0596
|
Adam M. Wilson
|
mod09 = ee.ImageCollection("MOD09GA").filter(ee.Filter.calendarRange(year,year,"year")).filter(ee.Filter.calendarRange(month,month,"month")).map(getmod09);
|
| 74 |
d7dc526e
|
Adam M. Wilson
|
# myd09 = ee.ImageCollection("MYD09GA").filter(ee.Filter.calendarRange(year,year,"year")).filter(ee.Filter.calendarRange(month,month,"month")).map(getmod09);
|
| 75 |
15936a3e
|
Adam M. Wilson
|
# calculate mean cloudiness (%), rename band, multiply by 100, and convert to integer
|
| 76 |
f5ef0596
|
Adam M. Wilson
|
mod09a=mod09.mean().select([0], ['mod09']).multiply(ee.Image(1000)).int16();
|
| 77 |
|
|
# myd09a=myd09.mean().select([0], ['MYD09_'+str(year)+'_'+str(month)]).multiply(ee.Image(100)).int8();
|
| 78 |
|
|
## Set data equal to whatver you want downloaded
|
| 79 |
|
|
data=mod09a
|
| 80 |
|
|
######################################################
|
| 81 |
|
|
|
| 82 |
|
|
## define region for download
|
| 83 |
|
|
region=[ulx,lry], [ulx, uly], [lrx, uly], [lrx, lry] #h11v08
|
| 84 |
|
|
strregion=str(list(region))
|
| 85 |
d7dc526e
|
Adam M. Wilson
|
# Next few lines for testing only
|
| 86 |
|
|
# print info to confirm there is data
|
| 87 |
c8be7255
|
Adam M. Wilson
|
print(data.getInfo())
|
| 88 |
f5ef0596
|
Adam M. Wilson
|
|
| 89 |
|
|
## print a status update
|
| 90 |
|
|
print(output+' Processing.... Coords:'+strregion)
|
| 91 |
|
|
|
| 92 |
d7dc526e
|
Adam M. Wilson
|
|
| 93 |
|
|
# add to plot to confirm it's working
|
| 94 |
f5ef0596
|
Adam M. Wilson
|
#ee.mapclient.addToMap(data, {'range': '0,100'}, 'MOD09')
|
| 95 |
|
|
#```
|
| 96 |
|
|
|
| 97 |
|
|
# TODO:
|
| 98 |
|
|
# use MODIS projection
|
| 99 |
15936a3e
|
Adam M. Wilson
|
|
| 100 |
|
|
# build the URL and name the object (so that when it's unzipped we know what it is!)
|
| 101 |
f5ef0596
|
Adam M. Wilson
|
path =mod09a.getDownloadUrl({
|
| 102 |
|
|
'name': output, # name the file (otherwise it will be a uninterpretable hash)
|
| 103 |
|
|
'scale': 926, # resolution in meters
|
| 104 |
c8be7255
|
Adam M. Wilson
|
'crs': 'EPSG:4326', #4326 # projection
|
| 105 |
f5ef0596
|
Adam M. Wilson
|
'region': strregion # region defined above
|
| 106 |
|
|
});
|
| 107 |
15936a3e
|
Adam M. Wilson
|
|
| 108 |
|
|
# Sometimes EE will serve a corrupt zipped file with no error
|
| 109 |
|
|
# to check this, use a while loop that keeps going till there is an unzippable file.
|
| 110 |
|
|
# This has the potential for an infinite loop...
|
| 111 |
|
|
|
| 112 |
f5ef0596
|
Adam M. Wilson
|
#if(not(os.path.exists(output+".tif"))):
|
| 113 |
|
|
# download with wget
|
| 114 |
|
|
print("Downloading "+output)
|
| 115 |
|
|
wget.download(path)
|
| 116 |
|
|
#call(["wget"+path,shell=T])
|
| 117 |
15936a3e
|
Adam M. Wilson
|
# try to unzip it
|
| 118 |
f5ef0596
|
Adam M. Wilson
|
print("Unzipping "+output)
|
| 119 |
|
|
zipstatus=call("unzip "+output+".zip",shell=True)
|
| 120 |
d7dc526e
|
Adam M. Wilson
|
# if file doesn't exists or it didn't unzip, remove it and try again
|
| 121 |
f5ef0596
|
Adam M. Wilson
|
if(zipstatus==9):
|
| 122 |
|
|
sys.exit("File exists:"+output)
|
| 123 |
|
|
# print("ERROR: "+output+" unzip-able")
|
| 124 |
|
|
# os.remove(output+".zip")
|
| 125 |
|
|
|
| 126 |
|
|
## delete the zipped file (the unzipped version is kept)
|
| 127 |
|
|
os.remove(output+".zip")
|
| 128 |
|
|
|
| 129 |
|
|
print(output+' Finished!')
|
| 130 |
58d05081
|
Adam M. Wilson
|
|
