Entity relationship of the health study GIS database, Karachi, Pakistan. Inter-relationship between spatial and non-spatial database and intra-relationship of the database tables are shown here for the GIS-based health study research project. The descriptions of the entity relationship are descried in the texts.
Ali et al. International Journal of Health Geographics 2004 3:20 doi:10.1186/1476-072X-3-20