I needed a rather large test dataset for an aerial imagery basemap, so I went onto USGS's "EarthExplorer" web site [1].
If you need to fetch a lot of data, don't bother trying to download it through the website itself, instead place an order through the "bulk downloader" interface [2]. The order size is limited however, but it was incredibly easy to patch in a simple 'window.setinterval' script through the JS console to make it automatically generate orders from a particular search set.
If you need to fetch a lot of data, don't bother trying to download it through the website itself, instead place an order through the "bulk downloader" interface [2]. The order size is limited however, but it was incredibly easy to patch in a simple 'window.setinterval' script through the JS console to make it automatically generate orders from a particular search set.
1: http://earthexplorer.usgs.gov 2: http://earthexplorer.usgs.gov/bulk/help