WV Tax Parcel database design

Report
WV Tax Parcel Mapping
Best Practices
May 14th 2013
Topics to Cover
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Introduction
Conversion methods and recommended practices
Tax Parcel database design
Maintaining & editing parcel data in ESRI 10x
Data Driven pages and WV hardcopy Tax Map
standards
Parcel Fabric
Introductions / Atlas Tax Parcel
Background
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GIS Tax Parcel & E911 Mapping
WV, NC, SC, GA, MD, VA, MS, IN, PA
From Deed , Plat , & Best Fit
Typical Delivery in ArcGIS 9x or 10x
AutoCadd
Atlas WV Tax Parcel & E911
Experience
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Hampshire- Tax Parcels & 911 Addressing
Greenbrier- Tax Parcels
Mineral- Tax Parcels & 911 Addressing
Preston- Tax Parcels
Pendleton- Tax Parcels & 911 Addressing
Wetzel- Tax Parcels & 911 Addressing
Lincoln- Tax Parcels
Conversion Methods
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Deeds and Plats
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Best Fit
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All referenced parcels mapped by legal documents
Most precise conversion method but most costly
Parcels mapped by “heads-up” digitizing method
Least accurate but most cost efficient
Hybrid Method (Most Popular)
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Use Plats where available to build base framework
Good accuracy and cost efficient
Conversion Guidelines
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Gather source information
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Current IAS export
Orthophotos
Digital Tax Maps and Plats
GIS base layers
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Centerlines
Hydro
Any other relevant miscellaneous layers
Conversion Guidelines
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Geo-reference Tax Maps
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Use Orthophotos
Careful of using existing vector data
Avoid Image warping
Locate Plats
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Plat references available by Parcel Number?
Use vicinity information on Plats
Create a place holder feature class for Plats
Conversion Guidelines
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Create Base Centerlines
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Digitize precise centerlines
Use geometric curves
Use Orthophotos
Buffer Right-of-Way widths
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WVDOH common widths
Scaled widths from rectified Tax Maps
Block style Right-of-Way Geometry
DOT Right-of-Way plans
Conversion Guidelines
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Hydro Features
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Update existing Hydro if available
Re-capture all major Hydro features
Miscellaneous
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E911 Centerlines
Address Points
Older parcel vector data
Conversion Guidelines
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Construct parcels using COGO
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+/- 30% of parcels by COGO
Adjust Right-of-Way where needed
Inventory plats accordingly
Best Fit remaining parcels
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COGO parcels as Control
Orthophotos
Rectified Tax Maps
Acreage
Right-of-Way Network
Conversion Guidelines
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Annotation
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Create annotation for all text on Tax Maps
Adhere to WV Specifications
Attribution
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Points/Polygons: Parcel ID, Acreage, Feature & Compilation
Code, Plat Reference, etc.
Feature Code lines
Conversion Guidelines
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Topology
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Build Topology rules up front
Maintain Topology day to day
Reconcile with Tax Data
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Find records that appear in IAS but not in vector data
Find parcels in vector data that do not appear in IAS
Review these findings
Ultimate goal is 100% match; Achievable?
WV Tax Parcel database design
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Points, Lines, & Polygons
Allows users to efficiently meet WV State specifications
Compatible with ArcGIS 9x or 10x environment
Can be loaded into ESRI Local Government Model
Designed around IAS
Works with “Out of the Box” ESRI Core Technology
Simplistic design while meeting all GIS requirements
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Efficient for day to day editing, management and topology
Data Demonstration
Points, Lines, & Polygons
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Advantages:
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Most efficient method for maintaining Tax Parcel
datasets
Retain survey information
Maximize use of Arc tools and topology
Maximize Cartographic display abilities
Data Demonstration
Data Driven pages
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Supported by ESRI
Dynamic WV State Spec map
Page definitions
Maplex Label Engine included in Arc 10.1
Data Demonstration
Parcel Fabric
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An ESRI supported approach focusing specifically on
land records management.
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Custom ESRI apps geared toward model
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Released in 10, recommended version is 10.1 SP1
Parcel Fabric
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Atlas Experience
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Advantages
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Parcel History
Maintaining survey information
Lines and polygons work as one
Data Demonstration
Question and Answer

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