What you need to know when searching for satellite imagery
Selecting the right imagery for a particular task can seem like a very complex undertaking. However, with a little practice, it is easy to narrow the choices from dozens of image types to just a few. The best way to decide what will work is to talk with other users who have addressed similar issues. Using remote sensing resources on the Internet such as email list servers or contacting a university or other organization working with satellite imagery, you can get valuable advice for selecting appropriate imagery.