Eastern Panhandle GIS Users Group Meeting held on 14 September 2016 in Martinsburg, WV. Presenter Tre Penegar, Brewer, Atlas Geographic Data, Inc.

1. Parcel Fabric and the Local
Government Model
September 2016
WV EPAN Conference

2. Topics to Cover
1. Introduction
2. What is Parcel Fabric?
3. Migrating to Parcel Fabric
4. Advantages of using Parcel Fabric
5. Local Government Information Model

3. What is Parcel Fabric ?
 Land Records Management System to maintain
parcels and store associated information.
 Sets a standard model that can be used across all land
records organizations.
 Part of the ESRI Local Government Information Model.

4. The WV Factor
 Recent conversions in Cabell and Monongalia
Counties, both of approximately 50,000
parcels.
– Biggest Challenge of Parcel Fabric for WV is road
Right-of-Ways and curves!

5. Data Migration
 Process lines to meet geometry requirements of the
Parcel Fabric.
 Validate Parcel Fabric required topology rules.
 Stage your data for migration.
 Check results to correct parcels that may fail to load.

6. Data Migration
 Process lines using ESRI Curves and Lines
tools.
– Convert mutli part curves to 2 point curves.
– Convert lines string curves to true curves.
– Reduce unnecessary vertices in line segments.

7. Data Migration
 Topology Rules for Migration
– Line Features must be covered by polygons
– Lines must not self-overlap
– Lines must not self intersect
– Lines must be single part
– Lines must not intersect or touch interior
– Polygons must be covered by lines

8. Data Migration
 Staging data for load to Parcel Fabric
– Give special consideration to attributes you want to
bring into the Parcel Fabric.
– Migration of attributes is much easier when you
match portions of your staging schema to that of the
Parcel Fabric.
– However, avoid matching the schema exactly as
this can cause problems with the load process.

9. Data Migration
 Check your results
– Some parcels WILL fail to load even with zero
topology errors. Pay attention to load results and
perform joins to ensure a complete migration.
– Use Check Fabric tool to run ESRI checks on the
parcel fabric to identify possible errors.

10. Advantages of Parcel Fabric
 Polygons and Lines work together in a connected
environment with built in topology. *To some extent
 Maintain an interactive history of change.
 Store original survey dimensions and geometry.
 ESRI supported tools, workflows, and applications.
 Use of control points and adjustments to improve
accuracy.

11. Advantages of Parcel Fabric
 Built in topology in Parcel Fabric
– Polygons and lines work and move as one.
– Built in topology is not perfect. Consideration should
be given to run an outside model checking for
additional topology and geometry QC on a regular
basis.

12. Advantages of Parcel Fabric
 Maintain History
– Best method to date for maintaining an archival and
interactive history layer.
– Not only archives changes such as splits and
combinations but also archives the legal date the
change went into effect, date the change was made
to the GIS, and the user who made the change.
– Can view history chronologically

13. Advantages of Parcel Fabric
 Store original survey information as entered
from the legal document.
– Survey dimensions are stored even if a line must be
altered to fit surrounding area.
– Can “go back” to original geometry by un-joining
and re-joining the parcel.

14. Advantages of Parcel Fabric
 ESRI supported tools and workflows and apps.
– Tools for and processes specifically designed for to
work within the parcel fabric.
 Parcel Editor
 Parcel Details
 Parcel Expolorer
 Parcel Workflows
– ESRI web map and application templates designed
around the LGIM and Parcel Fabric

15. Advantages of Parcel Fabric
 Control and Adjustments
– Can better incorporate control points such as NGS
monuments or other x,y locations and relate
locations to parcel corners.
– Control can also be established from high
confidence corners existing in data.
– Once control is established Least Squared
Adjustments can be ran on those related parcels.

16. Local Government Information
Model
 Database model designed to work across all matters of
local government GIS related operations.
 Standardized database that can work for everyone.
 Works with a growing number of ESRI web services
and applications.
 Makes it easier to share data across your organization
and others.

17. Question and Answer
 Contact Me
– Tre Penegar
– 910-256-9892
– tpenegar@atlasgeodata.com