Planning and Development Services Department Geographic Information Systems Division - Demographic Documents  Demographics, the "statistical study of human populations, "provides comprehensive information to help better understand current customers and prospects. Staff utilizes demographics effectively for more precise site selection, marketing, advertising, development, forecasting and more. Overview (PDF) Demographic Map Catalog Demographic Information Note:The links below are to Portable Document Format (PDF) files. To view and print these documents, you must obtain and install the PDF Acrobat Reader, available at no charge from Adobe Systems, Inc.