A command to download a list of files, to a folder.
The *.txt file should contain a list of URL's to download.
Each url should be on a new line.
When you run the command, it will expect you to pick a *.txt file containing a list of urls.
it will search in the same folder as the txt file, to see if the files exist.
Any files that do no already exist, will be downloaded to the same folder as the txt file is located at.
Be sure that the folder is writable, and that you have space on disc.
Max 256 files can be downloaded.
Speed depends on the server delivering the files you want to download, and your own local internet connection speed.
Once completed a txt file called "mergeInputFiles.txt" is written to the same folder. This contains the names of all the files and can be used as the options file in gdal_merge..