Tuesday, June 1, 2010

Getting MODIS Image Automatically From FTP in Python

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# This is a Python script that automatically downloads historical
# MODIS data from the LP DAAC FTP site
# This version should work for all of the tiled datasets
# It is currently hard-coded to downloaded specific MODIS tiles for
# the northern Great Plains & upper midwest

# Initailly historical date for Data transfer must be set on "lpdacc.txt".



import os, ftplib,sys,string


# Login information for accessing the LP DAAC FTP site
Hostname = "e4ftl01u.ecs.nasa.gov"
Username = "anonymous"
Password = "@anonymous"

# Get user inputs
# Base directory for the MODIS data

# Basedir = input("Enter the LP DAAC directory containing the dataset you want to download:")
Basedir="MOLT/MOD11A2.005"
print "The LP DAAC directory containing the dataset you want to download" +str(Basedir)


# Local directory for data storage
#Hdfdir = input("Enter the local directory where you want to store the hdf files:")
Hdfdir=r"H:\MODIS_LST_NDVI\MOD11A2\\"
print "The local directory where you want to store the hdf files" +str(Hdfdir)


# Empty lists for the collector functions
Dirlist = []
Filelist = []

mylog=open(r"H:\MODIS_LST_NDVI\MOD11A2\mylog.txt",'w',)

# Assigning Global ariables
i=0
k=0
flag=0

try:

# Define helper functions that are used to read files/subdirectories from the
# ftp site and store them as lists
def collector(line = ''):
global Dirlist
Dirlist.append(line)

def collector2(line = ''):
global Filelist
Filelist.append(line)



# Open ftp connection
ftp = ftplib.FTP(Hostname,Username,Password)

# Go to the directory containing the dataset of interest
ftp.cwd(Basedir)

# Involke the LIST ftp function, calling the collector function to store the
# results to Dirlist in list format
ftp.retrlines("LIST", collector)

# Get Directory listing only (Without including the sub directories)
mainDirlist=[]
myDirlist=[]
ftp.dir(mainDirlist.append)
myDirlist=mainDirlist[1:]
# parsing the Directory list
dirInfo=""


for mainDir in myDirlist:
#parsing the directory name only[2002.12.03]
mainDirname= mainDir[37:47]
dd=mainDirname[8:10]
mm=mainDirname[5:7]
yyyy=mainDirname[0:4]
#Extracging yyyy mm dd to compare with log file information
dirInfo=str(yyyy)+str(mm)+str(dd)
print mainDirname
print dirInfo

# Read the log file to retrive the information of latest downloaded data
logFileread=open(r"H:\MODIS_LST_NDVI\MOD11A2\lpdaac.txt",'r')
logFileread.seek(0)
logInfo=int(logFileread.read())
logFileread.close()

print"Local Drive Recent Log Dir # "+str(logInfo)
mylog.write("Local Drive Recent Log Dir # "+str(logInfo)+'\n')

# Coparing the logfile(already downloaded data) with recent datas in the ftp
if(int(logInfo) print "current path -->"+str(ftp.pwd())
if(flag==1): # if flag matches the criteria reset the counters
ftp.cwd("..")
k=0
flag=0
Filelist = []

# List all the files in the subdirectory
path=str(mainDirname)
ftp.cwd(path)
print "New path -->"+str(ftp.pwd())
# Filelist = ftp.dir()
##FTP Directory bhitra chire pni file ma chire ko chhina
ftp.retrlines("LIST", collector2)
#ftp.retrlines("LIST")
# Download data from the MODIS tiles that we are interested in
for Currow2 in Filelist:
Splitrow2 = Currow2.split()
Permissions = Splitrow2[0]

# Skip over the jpeg browse images - some of these cause problems
if Permissions[0:3] == "-rw":
Directories = Splitrow2[1]
Group = Splitrow2[2]
Size = Splitrow2[3]
Month = Splitrow2[4]
Date = Splitrow2[5]
Time = Splitrow2[6]
Filename = Splitrow2[7]
mylog.write(Filename)
LocalFile = Hdfdir + Filename
Splitfname = Filename.split(".")
# Split the header file name into its various components
Splitfname = Filename.split(".")
Mdataset = Splitfname[0]
Maqdate = Splitfname[1]
Mlocation = Splitfname[2]
Mprocdate = Splitfname[3]
Mext1 = Splitfname[4]
Mext2 = Splitfname[5]


# Pull out the horizontal and vertical tile numbers
Htile = Mlocation[1:3]
Vtile = Mlocation[4:6]


# Only retrieve data for the three tiles covering the NGP/Upper Midwest
if (((Htile == "09") & (Vtile == "04"))|((Htile == "10") & (Vtile == "04"))|((Htile == "11") & (Vtile == "04"))|((Htile == "12") & (Vtile == "04"))|((Htile == "09") & (Vtile == "05"))|((Htile == "10") & (Vtile == "05"))|((Htile == "11") & (Vtile == "05"))):
# Retrieve the hdf and xml files and place them in the local directory

ftp.retrbinary("RETR " + Filename, open(LocalFile, "wb").write)

# Write download information in the log file
logFwrite=open(r"H:\MODIS_LST_NDVI\MOD11A2\lpdaac.txt",'w')
logFwrite.seek(0)
logFwrite.write(dirInfo)
logFwrite.close()

k=k+1
if(k==14): # value of k should be no of tiles*2[for *.hdf and *.hdf.xml ]
flag=1

else:
print i
i=i+1
print "loginfor-->"+str(logInfo)
print "dirInfor-->"+str(dirInfo)
print "Dirname-->"+str(mainDirname)
print "Filename-->"+str(Filename)
mylog.write("loginfor-->"+str(logInfo)+'\n')
mylog.write("dirInfor-->"+str(dirInfo)+'\n')
mylog.write("Dirname-->"+str(mainDirname)+'\n')
mylog.write("Filename-->"+str(Filename)+'\n')



else:
print "Already downloaded in our local drive" +str(mainDirname)
mylog.write( "Already downloaded in our local drive" +str(mainDirname)+'\n')



finally:
ftp.quit()
ftp.close()
print "Closing FTP"
mylog.write("Closing FTP")
mylog.close()

Simple GUI Demo in Python

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from Tkinter import*
mainForm=Tk()

lblWelcome = Label(mainForm, text="Welcome to SSEBB Model")
lblWelcome.pack()

lblDisplay=Listbox(mainForm)

txtMyval=Entry(mainForm)
txtMyval.focus_set()
txtMyval.pack()

btnQuit=Button(mainForm,text="Close",command=quit)
btnQuit.pack(side="left",padx=10,pady=10)

def ShowVal():
lblDisplay.insert(0,txtMyval.get())


btnStart=Button(mainForm,text="Show in list",command=ShowVal)
btnStart.pack()

lblDisplay.pack(padx=20,pady=10)

mainForm.mainloop()
 

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