WV Tax Parcel MappingBest Practices

May 14th 2013

Topics to Cover

1. Introduction

2. Conversion methods and recommended practices

3. Tax Parcel database design

4. Maintaining & editing parcel data in ESRI 10x

5. Data Driven pages and WV hardcopy Tax Map standards

6. Parcel Fabric

Introductions / Atlas Tax Parcel Background

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

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

Deeds and Plats– All referenced parcels mapped by legal documents– Most precise conversion method but most costly

Best Fit– Parcels mapped by “heads-up” digitizing method– Least accurate but most cost efficient

Hybrid Method (Most Popular)– Use Plats where available to build base framework – Good accuracy and cost efficient

Conversion Guidelines

Gather source information– Current IAS export– Orthophotos– Digital Tax Maps and Plats– GIS base layers

Centerlines Hydro Any other relevant miscellaneous layers

Conversion Guidelines

Geo-reference Tax Maps– Use Orthophotos– Careful of using existing vector data– Avoid Image warping

Locate Plats– Plat references available by Parcel Number?– Use vicinity information on Plats– Create a place holder feature class for Plats

Conversion Guidelines

Create Base Centerlines– Digitize precise centerlines – Use geometric curves– Use Orthophotos

Buffer Right-of-Way widths – WVDOH common widths– Scaled widths from rectified Tax Maps– Block style Right-of-Way Geometry– DOT Right-of-Way plans

Conversion Guidelines

Hydro Features– Update existing Hydro if available– Re-capture all major Hydro features

Miscellaneous– E911 Centerlines– Address Points– Older parcel vector data

Conversion Guidelines

Construct parcels using COGO– +/- 30% of parcels by COGO– Adjust Right-of-Way where needed– Inventory plats accordingly

Best Fit remaining parcels– COGO parcels as Control– Orthophotos– Rectified Tax Maps– Acreage– Right-of-Way Network

Conversion Guidelines

Annotation– Create annotation for all text on Tax Maps– Adhere to WV Specifications

Attribution– Points/Polygons: Parcel ID, Acreage, Feature & Compilation

Code, Plat Reference, etc.– Feature Code lines

Conversion Guidelines

Topology– Build Topology rules up front– Maintain Topology day to day

Reconcile with Tax Data– 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

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

– Efficient for day to day editing, management and topology

Data Demonstration

Points, Lines, & Polygons

Advantages:– 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

Supported by ESRI Dynamic WV State Spec map Page definitions Maplex Label Engine included in Arc 10.1

Data Demonstration

Parcel Fabric

An ESRI supported approach focusing specifically on land records management.

Custom ESRI apps geared toward model

Released in 10, recommended version is 10.1 SP1

Parcel Fabric

Atlas Experience

Advantages– Parcel History– Maintaining survey information– Lines and polygons work as one

Data Demonstration

Question and Answer