

                                                                    Exhibit 23.1

                         Consent of Independent Auditors

We consent to the  reference to our firm under the caption  "Experts" and to the
use of our  reports  dated March 12, 1998 for Realty  Information  Group,  Inc.,
February 10, 1998 for Realty  Information  Group,  L.P.,  March 12, 1998 for OLD
RIG, Inc., and January 16, 1998 for Jamison  Research,  Inc., in Amendment No. 1
to the Registration Statement (Form S-1 No. 333-47953) and related Prospectus of
Realty  Information  Group, Inc. for the registration of 2,700,000 shares of its
common stock.

                                                           /s/ Ernst & Young LLP

Washington, D.C.
April 27, 1998



