Exhibit 4.1

                             SUPPLEMENTAL INDENTURE

                                       OF

                                    GUARANTOR

         THIS SUPPLEMENTAL INDENTURE dated as of October 7, 2003, is delivered
pursuant to Section 4.18 of the Indenture dated as of December 23, 2002 (as
heretofore or hereafter modified and supplemented and in effect from time to
time, the "2002 Indenture") among LAMAR MEDIA CORP., a Delaware corporation,
certain of its subsidiaries ("Guarantors") and WACHOVIA BANK OF DELAWARE,
NATIONAL ASSOCIATION, a national banking corporation, as Trustee ("Trustee")
(all terms used herein without definition having the meanings ascribed to them
in the 2002 Indenture).

         The undersigned hereby agree that:

         1.       The undersigned is a Guarantor under the 2002 Indenture with
all of the rights and obligations of Guarantors thereunder.

         2.       The undersigned has granted, ratified and confirmed, in the
form and substance of Exhibit B to the 2002 Indenture, the Guarantee provided
for by Article 10 of the 2002 Indenture.

         3.       The undersigned hereby represents and warrants that the
representations and warranties set forth in the 2002 Indenture, to the extent
relating to the undersigned as Guarantor, are correct on and as of the date
hereof.

         4.       All notices, requests and other communications provided for in
the Indenture should be delivered to the undersigned at the following address:

         Keith A. Istre
         Vice President - Finance and
         Chief Financial Officer
         Lamar Media Corp. and its Subsidiaries
         5551 Corporate Blvd.
         Baton Rouge, LA 70808

         5.       A counterpart of this Supplemental Indenture may be attached
to any counterpart of the 2002 Indenture.

         6.       This Supplemental Indenture shall be governed by and construed
in accordance with the internal laws of the State of New York.



         IN WITNESS WHEREOF, the undersigned has caused this Supplemental
Indenture to be duly executed as of the day and year first above written.

                              Guarantor:

                              Premere Outdoor, Inc.
                              an Illinois corporation

                              By: /s/ Keith A. Istre
                                 ------------------------------------
                                 Keith A. Istre
                                 Vice President - Finance and Chief Financial
                                 Officer

Attest:

By: /s/ James R. McIlwain
    ----------------------------------
    James R. McIlwain, Secretary

Accepted:

WACHOVIA BANK OF DELAWARE
NATIONAL ASSOCIATION, as Trustee

By: /s/ Brian K. Justice
   ----------------------------------
Title: Vice President

                                       2


                        Additional Subsidiary Guarantors

Ham Development Corporation

10 Outdoor Advertising, Inc.

Lamar California Acquisition Corporation