Abstract
JERS-1, launched in February 1992, is the first Japanese satellite dedicated to supplying of data for practical earth resources applications. ERSDIS, the image processing that is being developed in ERSDAC under sponsorship by MITI, is composed of 3 main subsytems : PRS for performing of basic image processings and management of data storages, ALS for making of standard products and support of R & D activities, and DRS for data retrieval and product ordering. In principle, most of routine works related to user services would be performed on the semi-automatic basis, initiated by accesses from user terminals (word processors or personal computers) through data communication lines.
