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Abstract
Hochiminh City (HCMC) is the biggest in Vietnam. It has over 6 million residences, over 1 million immigrants and about 1 million visitors a year. It consists of 23 districts including 17 urban districts and 6 suburban districts. It is keeping up the highest economic growth in Vietnam. Besides suburban zones are urbanized with high speed, a lot of urban areas has been re-planning with many reconstructed houses.

Some of urban districts have been developing systems of geographic information for land-use management and housing planning. In district 5, many procedures were implemented to support officers to do daily works. Digital cadastral maps were used as base maps. The digital base maps and their attributes were installed as a common database for GIS applications.

Based on a common database, the system issuing land-use and housing ownership licenses was implemented for the public services in the field of house and land. The systems making plan, managing state owned houses were also installed on the LAN network of the department of urban management to strengthen the capability of the district agency. After being trained, all officers of the department use these systems well for their daily works.

In this paper, the GIS applications are presented as a prototype in the modernization of the public administration of Vietnam authorities at district level. The GIS has improved the activities of district agencies to serve people better and better.