A comprehensive real property computerized data system that will aid municipal planners by pinpointing building and change has been developed by the District government.

It will improve the city's capability to "intervene in neighborhoods at the right times to reduce blight, to promote economic development and to control change in the best interests of the residents," according to Konrad J. Periman, acting deputy chief of the city's planning and research division.

The city's housing department and municipal planning office developed the system, which is called Municipal Automated Geographic Information System (MAGIS). It combines into one series of computerized files all of the District's recorded information on real estate. The information includes sales, permits, licenses, condemnations, fires, and data on the structures to substantiate assessed value.

The initial cost was $130,000 and another $200,000 grant was made to carry the program through 1979.

During its first year of operation, for example, MAGIS painted a statistical profile of the 14th Street urban renewal area that the department needed to apply for a grant from the U.S. Department of Housing and Urban Development for additional rental assistance. By surveying some of the 500 residential units, the analysts with the aid of the comuter were able to tell what was going on in the area and to prepare cost estimates.

MAGIS has the capability to print out computer maps of the District, showing, for example, sales or business turnover or ownership patterns.