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NCJRS Abstract

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NCJ Number: 67256 Find in a Library
Title: SUNNYVALE (CA) DEPARTMENT OF PUBLIC SAFETY - GEOGRAPHIC BASE FILE SYSTEM (FROM GBF (GEOGRAPHIC BASE FILES) USERS GROUP REPORTS, 1977 - SEE NCJ-67242)
Author(s): A A YEUNG
Corporate Author: International Assoc of Chiefs of Police
United States of America
Date Published: 1977
Page Count: 6
Sponsoring Agency: International Assoc of Chiefs of Police
Alexandria, VA 22314
Format: Document
Language: English
Country: United States of America
Annotation: THE SUNNYVALE DEPARTMENT OF PUBLIC SAFETY IN CALIFORNIA JOINED WITH OTHER MAJOR CITY DEPARTMENTS AND IMPLEMENTED AN ENVIRONMENTAL INFORMATION FILE (EIF) OF WHICH THE GEOGRAPHIC BASE FILE (GBF) IS A CENTRAL PART.
Abstract: THE EIF IS PART OF THE LARGER CITY MANAGEMENT INFORMATION SYSTEM (MIS), WHICH IS RUN ENTIRELY ON MINICOMPUTERS (DIGITAL EQUIPMENT CORPORATION PDP 11/70'S), AND IS SUPPLEMENTED BY A MOTOROLA COMPUTER-AIDED DISPATCH (CAD) SYSTEM. THE SUNNYVALE SYSTEM GEOCODES ITS INFORMATION BOTH THROUGH A REPORTING DISTRICT APPROACH WHICH PARALLELS THE TRADITIONAL GRID APPROACH AND THROUGH STREET ADDRESS BY APPLYING THE DUAL INDEPENDENT MAP ENCODING (DIME) TECHNIQUE DEVELOPED BY THE U.S. CENSUS BUREAU. THE MAJOR FILES IN THE GBF SUBSYSTEM INCLUDE COMMON LOCATORS AND MISSPELLINGS, A STREET MASTER FILE, INTERSECTION CONTROL FILE, A STREET CROSS-REFERENCE FILE, A GEOGRAPHIC BASE FILE, AND A PARCEL FILE. THE FIRST THREE ARE USED FOR ONLINE STREET ADDRESS EDITING AND ENCODING; THE FOURTH IS USED FOR ONLINE INQUIRY AND ONLINE ANALYSIS, AND THE LAST TWO ARE USED IN A BATCH ENVIRONMENT FOR GEOCODING A COLLECTION OF DATA FOR INDEPTH ANALYSIS OR MAPPING. THE PRIMARY USE OF THE GEORGRAPHIC INFORMATION IS MANAGEMENT REPORTS. THE SECOND MAJOR AREA OF APPLICATION IS CRIME ANALYSIS. FINALLY, THE GRIDS PROGRAM DEVELOPED BY THE U.S. CENSUS BUREAU IS BEING USED FOR COMPUTER MAPPING IN SUNNYVALE. VARIOUS COMPUTER MAPS OF CRIME PATTERNS FOR DIFFERENT LEVELS OF INTEREST CAN BE PRODUCED THROUGH CONTROL OF THE GRID SIZE. THE SUNNYDALE DEPARTMENT HOPES TO LINK UP THE COMPUTERS SO THAT THE GBF'S CAN BE ACCESSED BY THE CAD SYSTEM. THE DEPARTMENT ALSO PLANS TO USE ITS ADDRESS GEOCODED DATA TO ASSIST IN MANAGEMENT DECISION ON BEAT DESIGN AND RESOURCE ALLOCATION THROUGH COMPUTER SIMULATION THAT ADDRESSES BOTH THE DEPLOYMENT AND ALLOCATION QUESTION SIMULTANEOUSLY. (MHP)
Index Term(s): Automated police information systems; California; Computer mapping
Note: NCJ 67256 AVAILABLE ON MICROFICHE FROM NCJRS UNDER NCJ 67242.
To cite this abstract, use the following link:
http://www.ncjrs.gov/App/publications/abstract.aspx?ID=67256

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