File indexing completed on 2024-04-28 03:42:51

 #!/bin/bash
 
 # What this is:
 #
 # Helpful script to download Digitized Sky Survey images using KStars
 # DBus interfaces to resolve object names. The script is designed to
 # produce fixed FOVs instead of relying on KStars' object-specific FOV
 # choices.
 
 # Data use and copyrights:
 #
 # Please note that the images downloaded are governed by the terms of
 # the data use policies of the Digital Sky Survey. Relevant links are:
 # http://archive.stsci.edu/dss/acknowledging.html
 # http://archive.stsci.edu/data_use.html
 #
 # SPDX-FileCopyrightText: 2015 Akarsh Simha <akarsh@kde.org>
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 # Dependencies:
 #
 # Requires: qdbus, wget
 # Optional: ImageMagick suite (for mogrify)
 
 
 # Usage:
 #
 # ./dss_downloader.sh <list_file>
 #
 # list_file is a text file containing a list of objects known to
 # KStars. One object on one line
 #
 # You may need to comment / uncomment some lines and/or modify some
 # numbers to suit your needs
 
 # Specify the sizes of the images below in arcminutes. No
 # minimum. Maximum 75 arcminutes.
 size_1="15"
 size_2="30"
 #size_3="45"
 
 # Read the file
 while read object; do
     echo "========== Processing ${object} =========="
 
     # Get the DSS URL from KStars
     raw_dss_url=$(qdbus org.kde.kstars /KStars org.kde.kstars.getDSSURL "${object}")
 
     # Strip height and width from URL
     trimmed_dss_url=$(echo ${raw_dss_url} | sed 's/&h=[0-9\.]*&w=[0-9\.]*//')
 
     # Prepare URL for each size
     dss_url_size1="${trimmed_dss_url}&h=${size_1}&w=${size_1}"
     dss_url_size2="${trimmed_dss_url}&h=${size_2}&w=${size_2}"
 #    dss_url_size3="${trimmed_dss_url}&h=${size_3}&w=${size_3}"
 
     # Prepare file names for each size
     object_underscored=$(echo ${object} | sed 's/  */_/g')
     filename_size1="${object_underscored}_${size_1}x${size_1}.gif"
     filename_size2="${object_underscored}_${size_2}x${size_2}.gif"
 #    filename_size3="${object_underscored}_${size_3}x${size_3}.gif"
 
     # Download the images
     wget ${dss_url_size1} -O ${filename_size1}
     wget ${dss_url_size2} -O ${filename_size2}
 #    wget ${dss_url_size3} -O ${filename_size3}
 
     # Optional -- comment to disable
     # Make the DSS images white on black instead of black on white
 #    mogrify -negate ${filename_size1}
 #    mogrify -negate ${filename_size2}
 #    mogrify -negate ${filename_size3}
 
     # Optional -- uncomment to enable
     # Scale down images that are larger than 1024x1024 pixels in size to 1024x1024
     # mogrify ${filename_size1} -resize "1024>"
     # mogrify ${filename_size2} -resize "1024>"
     # mogrify ${filename_size3} -resize "1024>"
 
 done < $1;
 
 echo "========== ALL DONE! =========="