Street Addressing Standards and Guidelines for the State of Georgia
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Street Addressing Standards and Guidelines for the State of Georgia Prepared by Georgia Spatial Data Infrastructure GIS Coordinating Committee Framework Transportation Technical Working Group August 2000 i FOREWORD This guideline was produced by The University of Georgia’s Office of Information Technology Outreach Services (ITOS) under contract with Georgia’s GIS Coordinating Committee as part of a collaborative effort to develop the State of Georgia’s core Geographic Information System (GIS) base map. Street Addressing Standards and Guidelines ii TABLE OF CONTENTS 1 INTRODUCTION .......................................................................................................................1 2 PURPOSE..................................................................................................................................2 3 GOALS .....................................................................................................................................2 4.0 TERMINOLOGY.....................................................................................................................3 4.1 Physical Address & Mailing Address........................................................................3 4.2 Parsing........................................................................................................................3 4.3 Address Database.......................................................................................................4 4.4 Roads Database with Address Ranges (RDAR) ........................................................4 5.0 REVIEW OF EXISTING STANDARDS......................................................................................6 5.1 United States Postal Service (USPS) ............................................................................6 5.2.0 US Census Bureau (USCB)........................................................................................7 5.2.1 Roads Database (RDAR) ........................................................................................7 5.2.2 Address Database....................................................................................................9 5.2.3 Alphabetic Case ......................................................................................................9 5.3 National Emergency Numbering Association (NENA)..............................................10 5.3.1 Address Database..................................................................................................10 5.3.2 Roads Database (RDAR) ......................................................................................10 5.4 Georgia Department of Transportation (GDOT) ........................................................11 5.5 American Planning Association (APA) ......................................................................11 6.0 RECOMMENDED STANDARDS AND GUIDELINES FOR ADDRESSING..................................12 6.1 ESTABLISHING A REFERENCE POINT AND BASELINES ..................................................12 6.1.1 Establishing a Reference Point .............................................................................12 6.1.2 Establishing Baselines ..........................................................................................12 6.2.0 STREET NAMING..........................................................................................................13 6.2.1 General Principles of Assigning Pre-Directions ......................................................15 6.2.2 General Principles of Assigning Street Names ........................................................15 6.2.3 General Principles of Assigning Street Types..........................................................19 6.2.4 General Principles of Assigning Quadrants .............................................................19 6.3.0 STREET NUMBERING ...................................................................................................21 Street Addressing Standards and Guidelines iii 6.3.1 Assign Each Street an Order.................................................................................21 6.3.2 Assign Each Street a Parent ..................................................................................22 6.3.3 Assign Address Ranges.........................................................................................23 6.3.3(a) First Order Streets..............................................................................................23 6.3.3(b) Higher Order Streets..........................................................................................24 6.3.3(c) Special Cases.....................................................................................................26 6.3(a) Advantages of This System .....................................................................................28 6.3(b) Disadvantages of This System.................................................................................30 6.4.0 HOUSE NUMBERING ....................................................................................................30 6.4.1 Corner Lots...............................................................................................................31 6.4.2 Stacked Addresses....................................................................................................31 6.4.3 Apartments and Duplexes ........................................................................................31 6.4.4 Businesses ................................................................................................................32 6.4.5 Mobile Home Parks..................................................................................................32 7 APPENDICES ..........................................................................................................................33 7.A RECOMMENDED DATABASE DESIGNS ...........................................................................33 7.A.1 Recommended Design of Address Database (Minimum Content) .........................33 7.A.2 Recommended Design of RDARs (Minimum Content) .........................................34 7.A.3 Justification for Width and Data Type Recommendations .....................................35 7.B STREET TYPES WITH DESCRIPTIONS ............................................................................38 7.C POTENTIAL ADDRESS DATA SOURCES..........................................................................42 8. SELECTED REFERENCES.......................................................................................................43 Street Addressing Standards and Guidelines iv Street Addressing Standards and Guidelines 1 1 INTRODUCTION Because the property address is a fundamental component of any government service delivery system, it must be assigned through a logical and consistent procedure. The importance of proper addressing cannot be overstated; during an emergency it can mean, quite literally, the difference between life and death. Additionally, addressing helps define educational and political districts, and affects the quality of services available to citizens. A logical and consistent addressing system, therefore, can tangibly improve the quality of life in a community. Unfortunately, the importance of the addressing task is frequently overlooked, resulting in addressing schemes that are often unorganized or incomprehensible and that lead to inefficient and ineffective governmental and commercial service delivery. But easily understood addressing systems are not simple to design and maintain. Local governments have found that managing a coherent addressing system can be difficult even under the best circumstances. During periods of steep growth, existing flaws in addressing systems -- duplicate street names, unnecessary name changes, non-sequential numbering, etc. – can cause small inconsistencies to propagate through the system, creating even larger problems. Currently, many Georgia counties do not use municipal style addresses (e.g., 101 E Main St SE), but conversion from the old system of rural routes and boxes is inevitable as more counties implement 911 systems. The standards and guidelines in this document are designed to make the process a little easier and to help make addressing across the State of Georgia more consistent. Citizens usually bear the cost of poorly designed addressing systems through inefficient government services and through lost business when potential customers are unable to locate an establishment. Poorly designed addressing systems result in postage increases, delivery delays, lost parcels, and even loss of property and life. Yet ironically, those most likely to oppose the revamping of older addressing systems (which may contain errors likely to interfere covertly with services) are the local citizens and businesses themselves, who may be required to revise subscriptions and billing, or to reprint labels, stationery, and the like. As a result, public officials who are aware of the dangers posed by addressing-system problems may discover that their constituencies do not support change. Education and public involvement are essential elements Street Addressing Standards and Guidelines 2 in developing a comprehensive solution. Citizens must know why it is necessary to readdress, and they must be provided an opportunity to participate in the process. Today there are various tools to help implement a new addressing system or revamp an existing one. Although Geographic