


                                   EXHIBIT 4.1

[FORM OF FACE OF CERTIFICATE]

RIGX                                                           CUSIP 75612B 10 7


                         REALTY INFORMATION GROUP, INC.

                     INCORPORATED UNDER THE LAWS OF DELAWARE

COMMON STOCK

This   certifies   that   _____________________________________   is  the  owner
of________________________ fully paid and non-assessable shares of Common Stock,
$.01 par value, of

                         REALTY INFORMATION GROUP, INC.

transferable  on the books of the  Corporation by the holder hereof in person or
by a duly  authorized  Attorney  upon  surrender  of this  Certificate  properly
endorsed.  This Certificate is not valid until  countersigned  and registered by
the Transfer Agent and Registrar.

         Witness  the  facsimile  seal  of the  Corporation  and  the  facsimile
signatures of the duly authorized officers.

Dated:

-----------------------------                   --------------------------------
Sandra F. Chambers                              Andrew C. Florance
Secretary                                       Chief Executive Officer and
                                                President

Countersigned and Registered:  American Stock Transfer & Trust Company
                                           Transfer Agent and Registrar


<PAGE>


[FORM OF BACK OF CERTIFICATE]

                         REALTY INFORMATION GROUP, INC.

         The Corporation shall furnish without charge to each stockholder who so
requests,  a statement of the powers,  designations,  preferences  and relative,
participating,  optional or other special rights of each class or series thereof
and the  qualifications,  limitations or restrictions of such preferences and/or
rights.

         The following  abbreviations,  when used in the inscription on the face
of this certificate,  shall be construed as though they were written out in full
according to applicable laws or regulations.

TEN COM            --as tenants in common
TEN ENT            --as tenants by the entireties

JT TEN            --as joint tenants with right of survivorship and not as
                           tenants in common

 UNIF GIFT MIN ACT--__________________Custodian_______________
                         (Cust)                   (Minor)

                  under Uniform Gifts to Minors Act________________________
                                                         (State)

Additional abbreviations may also be used though not in the above list.

For value received, _________________ hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
    IDENTIFYING NUMBER OF ASSIGNEE

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
   PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE OF ASSIGNEE

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__________________________________________________________________________Shares
of the  capital  stock  represented  by the  within  Certificate,  and do hereby
irrevocably constitute and appoint ____________________ Attorney to transfer the
said  stock on the books of the  within  named  Corporation  with full  power of
substitution in the premises.

Dated, _____________________

         -----------------------------------------------------------------------
NOTICE:  The  signature  to this  assignment  must  correspond  with the name as
written upon the face of the certificate in every particular, without alteration
or enlargement, or any change whatever.

SIGNATURE GUARANTEED:  ---------------------------------------------------------
The  signature(s)  should be  guaranteed  by an eligible  guarantor  institution
(Banks,  stockbrokers,  savings  and loan  associations  and credit  unions with
membership in an approved signature guarantee  Medallion  program),  pursuant to
S.E.C. Rule 17Ad-15.




