The fact remains that the IC-92AD does not have a TNC and is not an APRS radio like the Kenwood TM-D7, soon-to-be-released Kenwood TM-D72, and Yaesu VX-8R/8DR/8GR. The IC-92AD cannot encode/transmit APRS packets or receive/decode APRS packets unless it is connected to an external TNC.
The IC-92AD can transmit and receive position data using the D-STAR digital format as part of the D-STAR data stream. There are gateways that pull these position reporrts out of the D-STAR digital domain and stuff them into the APRS-IS network of servers. This is known as DPRS which is a data conversion specification, not a position reporting protocol.
Unless you have a local APRS I-gate that looks for local "DPRS" position reports in the APRS-IS database and transmits them on RF as APRS position reports, I don't believe you will be able to see "DPRS" position reports on your local APRS RF channel. If you have an Internet connection, you will be able to see these "DPRS" position reports on a map. But APRS is about local, tactical information over a local RF network, not just vehicle tracking and mapping tools via the Internet.