Why is geospatial information service the best way to realize geospatial information sharing.

A、Realized the transformation from offline data conversion to online data sharing.;
B、Realized the transformation from full data sharing to on-demand data sharing.;
C、Realized the transformation from data sharing to data and function sharing.;
D、Geospatial information sharing based on geospatial information services is essentially a comprehensivesharing of software resources, hardware resources, and data resources.