Cable television franchise owners told Prince George's County officials last week that they plan to begin installing equipment to serve county residents soon.

The accompanying map shows the building plan required by county ordinance for Storer Cable Communications of Maryland, Inc. in the northern half of the county as well as MetroVision of Prince George's in the southern half.

By the end of the summer, cable service will be available to about 17,000 homes in the southern section and more than 20,000 in the northern section, as indicated by the darkest shaded areas.

The second and third year of the building schedule are indicated by progressively lighter shades. The listed municipalities have awarded individual franchises.

Most municipalities shown have already been wired by Storer, including Bladensburg, Berwyn Heights, College Park, Colmar Manor, Glenarden, Hyattsville and Riverdale. Others, including District Heights, Capitol Heights, Bowie, Laurel and New Carrollton, are set to begin offering service this summer, according to cable company spokesmen.

The cable companies will be offering a potential of between 72 and 112 channels of service, including 24-hour sports, news, weather, and all local and Baltimore television stations as well as movie channels.

Areas shown in white outside the listed municipalities are not required to be wired under the county franchise plans because of their low population density. However, county cable television spokesmen expect that the cable companies will eventually offer service to those areas.