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Abstract
Designing, Implementing, and Sharing a Spatially Accurate Enterprise GIS
Track: Cadastral and Land Records
Author(s): Kevin Hardester
Modeled on the Orange County, Florida, GIS, this presentation will guide interested parties through the steps necessary to create a multilayer, multipurpose GIS through interlocal agreements. The system is built on survey control, orthorectified photography, and planimetric data to produce an accurate parcel base using coordinate geometry. This forms the foundation for the delivery of information over the local area network (LAN), Intranet, and Internet to office staff, County and city agencies, and the general public. Field data capture utilizes mobile computing with work flow management and workload balancing.
In Orange County, the Property Appraiser's Office serves as the County-wide Project Management Agency for the acquisition of survey control, digital orthophotography, and planimetric data for development and maintenance of parcel maps. The Property Appraiser is responsible for the sharing of these databases along with vital appraisal/assessment data over the network(s). The hardware platforms include Microsoft Windows 98, NT workstations and servers, and SunMicrosystems UNIX servers. The overall software system components used are ArcInfo, ArcView, ArcIMS, SDE, VB, Java, and Oracle. The spatial accuracy of the GIS is guaranteed plus/minus two feet, with 90 percent of points under one foot accuracy. Other agencies add various layers of spatial data and attributes as necessary for specific applications, such as planning and traffic engineering. The major user interfaces are a Web browser and a power user customized ArcView enterprise access program that integrates CAMA (Computer Assisted Mass Appraisal) tax roll data, and GIS.
Orange County and the County Property Appraiser are creating another interlocal agreement that will place the Property Appraiser as the Project Management Agency for the County-wide data clearinghouse and for setting data standards. This will evolve the GIS to a fully functional enterprise GIS for County and regional use. Discussion and implementation of this agreement will also be presented.
The overall steps to be discussed are
a) Needs analysis (what is wanted and why)
b) Project definition (what, when, where, and how is it going to be done)
c) How is it going to be paid for
d) Project management
e) Maintenance and evolution of the system
f) Data clearinghouse and enterprise GIS
Kevin Hardester
Orange County Property Appraiser
Administration
200 S. Orange Ave.
Suite 1700
Orlando , FL 32801
USA
Phone: 407-836-5072
Fax: 407-836-5029
E-mail: khardester@ocpafl.org