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itslive_mosaic_downloader.m
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itslive_mosaic_downloader.m
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% This script downloads its_live velocity mosaics. Just select your region
% of interest and let it run.
% Written by Chad Greene of NASA Jet Propulsion Laboratory, October 2020.
%% Set preferences:
region = 'ALA'; % Can be GRE, ANT, HMA, PAT, ICE, SRA, CAN, or ALA.
overwrite = false; % If true, this will download and overwrite files by the same name. If false, any existing files are not downloaded.
yr = [0000 2018:-1:1985]; % Download the overall mosaic first, then each year starting with most recent.
%% Download:
% Depending on the region and the speed of your internet connection, this might
% take a while. For example, each mosaic for the HMA region is a few hundred MB,
% so with my mediocre home internet connection it takes about 30 minutes to
% download all 30+ years of data.
% Loop through each year:
w = waitbar(0,'Downloading ');
for k = 1:length(yr)
% Define filename:
if k==1
fn = [upper(region),'_G0240_0000.nc'];
url = ['http://its-live-data.jpl.nasa.gov.s3.amazonaws.com/velocity_mosaic/landsat/v00.0/static/',fn];
waitbar((k-1)/length(yr),w,'Downloading data from the overall mosaic.')
else
fn = [upper(region),'_G0240_',num2str(yr(k)),'.nc'];
url = ['http://its-live-data.jpl.nasa.gov.s3.amazonaws.com/velocity_mosaic/landsat/v00.0/annual/',fn];
waitbar((k-1)/length(yr),w,{['Downloading data from the ',num2str(yr(k)),' mosaic.'];'Going backward through time...'})
end
if exist(fn,'file')==2
if ~overwrite
disp(['Skipping ',fn,' because it already exists.'])
continue % skips this mosaic if the user says don't overwrite existing files.
end
end
websave(fn,url);
end
waitbar(1,w,'Done')
pause(0.1)
close(w)