  The MocServer is an astronomical service dedicated to the manipulation of
data set coverages. This server sets together about 15 000 spatial footprints
associated to catalogs, data bases and pixel surveys. Thanks to the Multi-Order
Coverage map coding method (MOC1.0 IVOA standard), the MocServer is able to
provide in a few milliseconds the list of data set identifiers intersecting any
polygon on the sky. The MOC server has been deployed in June 2015 by the Centre
de Donnees astronomiques de Strasbourg. It is operational and already in use by
Aladin Desktop and Aladin Lite prototype versions.
