1. A method of providing an information service, comprising: using a server to host a web site to receive a customer request for information about a specified change at a specified geographical location over a specified period of time; accessing correlated, real-time images of the specified geographical location, the images captured over the specified time period by at least one remote data sensing source that is airborne or space-based, wherein the correlated images have been processed to be spatially matched and spectrally corrected; using a computer to process the correlated images with an algorithm to extract the information about the specified change at the specified geographical location over the specified time period; and delivering the extracted information.