GISValTech2025: Full Schedule

Welcome to the 2025 GIS/Valuation Technologies Conference, taking place in Columbus, Ohio, March 3-6, 2025! This is where you review the comprehensive educational program for the conference and plan your agenda.

The Geospatial Professional Network (formerly URISA) and the International Association of Assessing Officers are once again pleased to co-host this important event. Attendees earn ample IAAO CE credits and GISP Education points.

More education! Attendees requested more workshops - the opportunity to dive deeper into important topics. So we have included four half-day workshops to the conference on Thursday afternoon. Be sure to check them out and plan accordingly!

Go to this page to register for the conference and make travel plans and review sponsor and exhibit packages. Take note of early bird discounts through January 6!

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7:30am EST

Coffee Break

Tuesday March 4, 2025 7:30am - 8:30am EST

Robinson Foyer

Tuesday March 4, 2025 7:30am - 8:30am EST
Robinson Foyer

Coffee Break

7:30am EST

Registration

Tuesday March 4, 2025 7:30am - 5:00pm EST

Registration

9:00am EST

Welcome & Keynote Address

Tuesday March 4, 2025 9:00am - 10:00am EST

Kojo Kamau Ballroom – 4th Floor

Welcome to the 26th Annual GIS/Valuation Technologies Conference. Hear from Rob McGee, 2025 Conference Chair, about the not-too-miss education and valuable networking on the agenda.

Leaders from both the International Association of Assessing Officers and the Geospatial Professional Network (formerly known as URISA) will also be on hand to update attendees about organizational initiatives and opportunities to contribute.

Then look forward to an impactful keynote address!

Speakers

April Urban

Director of Research and Impact, Signal Cleveland

Experienced nonprofit and public sector research and evaluation professional with expertise in aligning data and community priorities. Skilled at building and facilitating cross agency teams to accomplish community-driven goals. The technical know-how to direct and complete data ETL... Read More →

Rob McGee

Deputy Director, Arkansas Assessment Coordination Division

Thomas Fisher, GISP, AICP

Enterprise Geospatial Technologies Administrator, Cuyahoga County

With over 30years in the field of GIS, Tom Fisher is currently the Enterprise Geospatial Technologies Administrator for the County of Cuyahoga in Ohio. He leads a staff of five GIS professionals in the County’s Department of Information Technology. Mr. Fisher is the Immediate Past... Read More →

Donna VanderVries, CAE, AAS, PPS, Esq

IAAO President, Muskegon County

Tuesday March 4, 2025 9:00am - 10:00am EST
Kojo Kamau Ballroom – 4th Floor

Keynote Address

10:00am EST

Coffee Break

Tuesday March 4, 2025 10:00am - 10:30am EST

Robinson Foyer

Tuesday March 4, 2025 10:00am - 10:30am EST
Robinson Foyer

Coffee Break

10:30am EST

Technology Showcase

Tuesday March 4, 2025 10:30am - 11:30am EST

Charles Massey – 3rd Floor

Opportunity to attend a presentation from our conference sponsors. Stay tuned for details as the sessions in this track are filled. Our sponsors pave the way as trend setters and technology champions. Be sure to attend these sessions and also visit the exhibit hall to stay a step ahead.

Interested in securing a spot? Be sure to sign up as a sponsor/exhibitor. Opportunities posted here.

Tuesday March 4, 2025 10:30am - 11:30am EST
Charles Massey – 3rd Floor

TECHNOLOGY SHOWCASE

10:30am EST

GIS for Assessors: From Zero to Hero Without Losing Your Mind

Tuesday March 4, 2025 10:30am - 12:00pm EST

Pheoris West A – 3rd Floor

Buckle up, assessors! This session is your one-way ticket to GIS greatness. Whether you're a GIS newbie or a seasoned pro, we'll show you how to harness the power of maps to make your job easier (and maybe even a little bit fun). Learn how to wrangle parcel data, spot property value outliers like a hawk, and explain those pesky assessments to stakeholders without breaking a sweat.

We'll even throw in some AI magic and ﬁeld workﬂow tips to keep things interesting. Trust us, you'll leave this session feeling like a GIS superhero (cape not included).

Exploring GIS for Assessors
Linda Foster, PLS, GISP, MGIS, Director - Land Records/Cadastre, Esri
Lauren Voelker, Senior Solution Engineer, Esri

Moderators

William Stephenson, AAS

Chief Deputy of Real Estate, Washington County

Speakers

Linda Foster, PLS, GISP, MGIS

Director - Land Records/Cadastre, Esri

Linda Foster oversees Esri’s worldwide strategic vision for land records, cadastre, surveying, and land administration. A leader in professional organizations, she is Vice President of the National Society of Professional Surveyors (NSPS), has mentored in the URISA mentorship network... Read More →

Lauren Voelker

Senior Solution Engineer, Esri

Lauren Voelker is a Senior Solution Engineer on Esri's Land Records and Local Government teams. She works with city and county governments throughout the US to help them develop and deploy GIS solutions. Prior, she worked in county government supporting a wide array of industries... Read More →

Tuesday March 4, 2025 10:30am - 12:00pm EST
Pheoris West A – 3rd Floor

GIS Technologies

10:30am EST

GIS Parcel Data for the Nation

Tuesday March 4, 2025 10:30am - 12:00pm EST

Roman Johnson – 3rd Floor

A discussion of how counties and states can work together to drive the creation, integration, and publication of digital tax parcel data. This partnership can be leveraged to make National, open access to GIS parcel data a future reality.

Shelby D. Johnson, State Geographic Information Officer, Transformation and Shared Services, Arkansas GIS Office
Christine Stinchcomb, CMS, Commercial Division Manager, Cobb County Board of Tax Assessors, Marietta, GA
Kate Kiyanitsa, GISP, GIS Specialist Program Manager, NYS GIS Program Office, Albany, NY

Moderators

Dan Cypert, RES, AAS

Chief Deputy Assessor, Washington County

Chief of Staff for Assessor’s Office in Washington County, Arkansas. Currently serves on the GIS/ValTech Conference Content committee.

Speakers

Shelby D. Johnson

State Geographic Information Officer, Arkansas GIS Office

I enjoy listening to your ideas on political strategies for GIS, national geospatial policy, and strategic initiatives for national GIS development. I served as the President of the National States Geographic Information Council in 2015, and now serve on the Arkansas 911 Board. I... Read More →

Christine Stinchcomb, CMS

Commercial Division Manager, Cobb County Board of Tax Assessors

Kate Kiyanitsa, GISP

GIS Specialist Program Manager, NYS GIS Program Office

Tuesday March 4, 2025 10:30am - 12:00pm EST
Roman Johnson – 3rd Floor

LEADERSHIP & MANAGEMENT

10:30am EST

Esri Hands-On Learning Lab

Tuesday March 4, 2025 10:30am - 12:00pm EST

Alfred Tibor- 3rd Floor

Take free self-paced lessons on a variety of GIS and ArcGIS topics. Esri's Hands-On Learning Lab will be at GIS/ValTech 2025.

Tuesday March 4, 2025 10:30am - 12:00pm EST
Alfred Tibor- 3rd Floor

LEARNING LAB

10:30am EST

Valuation Unchained: Machine Learning’s New Neighborhood

Tuesday March 4, 2025 10:30am - 12:00pm EST

Pheoris West B– 3rd Floor

This session introduces a novel method to improve location adjustments using a machine learning methodology and explores the creation of neighborhood boundaries by examining how these boundaries might impact mass valuation models.

Enhancing Property Location Adjustments Using Spatial Interpolation
Daniel Fasteen, Ph.D., Senior Data Scientist, Tyler Technologies, Rosemount, MN
What’s New in the Neighborhood?
Russ Thimgan, President, Thimgan & Associates, Goodyear, AZ
Leah Thimgan, Operations Director, Thimgan & Associates, LaJunta

Moderators

Thomas Swingle

Deputy Assessor, Adams County

Speakers

Daniel Fasteen, PhD

Senior Research Scientist, Tyler Technologies

Daniel Fasteen, Ph.D. is a Senior Research Scientist with Tyler Technologies. Since 2010, Daniel has worked various roles in both the private and local government sector as a CAMA manager, product manager, research scientist, and consultant focusing on GIS application, property... Read More →

Russ Thimgan

President, Thimgan & Associates

Russ extended experience in the assessment field, coupled with involvement in Ad Valorem Taxation since 1988, makes him a valuable asset in determining assessment needs. With an Economics degree, he is an expert in mass appraisal.His work with over 30 different jurisdictions and lending... Read More →

Leah Thimgan

Operations Director, Thimgan & Associates

Tuesday March 4, 2025 10:30am - 12:00pm EST
Pheoris West B– 3rd Floor

MODELING & VALUATION

12:00pm EST

Hosted Networking Lunch

Tuesday March 4, 2025 12:00pm - 1:00pm EST

Kojo Kamau Ballroom – 4th Floor

Enjoy a hosted buffet luncheon and quality time with your fellow conference attendees. Dessert will follow in the exhibit hall (which opens after lunch).

Tuesday March 4, 2025 12:00pm - 1:00pm EST
Kojo Kamau Ballroom – 4th Floor

HOSTED MEAL EVENTS

1:00pm EST

Grand Opening and Dessert Break in the Exhibit Hall

Tuesday March 4, 2025 1:00pm - 2:00pm EST

Aminah Robinson ABC – 5th Floor

Head to the Exhibit Hall for dessert and your first chance to connect with our generous exhibitors and sponsors!

Tuesday March 4, 2025 1:00pm - 2:00pm EST
Aminah Robinson ABC – 5th Floor

Coffee Break

2:00pm EST

Technology Showcase

Tuesday March 4, 2025 2:00pm - 3:00pm EST

Charles Massey – 3rd Floor

Tuesday March 4, 2025 2:00pm - 3:00pm EST
Charles Massey – 3rd Floor

TECHNOLOGY SHOWCASE

2:00pm EST

From Flat Maps to Fancy Digital Twins: How to Avoid a Property Tax Meltdown (and Maybe Even Impress Your Boss)

Tuesday March 4, 2025 2:00pm - 3:30pm EST

Pheoris West A – 3rd Floor

Get ready to ditch those dusty old maps and dive into the wild world of digital twins! This session will take you on a whirlwind tour of how mapping tech has evolved from boring 2D blobs to mind-blowing 3D simulations. We'll show you how to use these fancy new tools to spot wonky property assessments, keep your tax base from imploding, and maybe even make your city a little bit smarter. We'll even throw in some real-world examples from Korea (because who doesn't love a good international property tax drama?). So, grab your thinking caps and get ready to level up your mapping game!

Analysis of Spatiotemporal Changes in Seoul Apartment Prices Using the Space-Time Cube Model
Su-Yeon Jung, Ph.D., Professor, Jeju National University, Republic of Korea
From 2D Base Maps to Digital Twins
Jason Caldwell, Vice President of Business Development and Sales, Sanborn Geospatial, Colorado Springs, CO

Speakers

Su-Yeon Jung, Ph.D.

Professor, Jeju National University

Suyeon Jung has been a professor of the Department of Economics at Jeju National University since 2004. She has served as a member of Appraisal Standard Committee of KAPA, an organization for more than 4,000 Korean appraisers. For the first time under the 20-year history of the... Read More →

Jason Caldwell

Vice President of Business Development and Sales, Sanborn Geosptial

Jason Caldwell is the Vice President of Business Development and Sales at the Sanborn Geospatial. He has 26 years of experience in GIS, remote sensing and mapping environments. He has completed business consulting activities that have provided clarity and visionary direction for a... Read More →

Tuesday March 4, 2025 2:00pm - 3:30pm EST
Pheoris West A – 3rd Floor

GIS Technologies

2:00pm EST

A Guide to Management Methods for Technical GIS Staff

Tuesday March 4, 2025 2:00pm - 3:30pm EST

Roman Johnson – 3rd Floor

This presentation aims to provide a comprehensive framework for managing technical GIS staff effectively, ensuring they are well-trained, productive, and held accountable through meaningful performance metrics and data quality standards.

Nathan Langdon, GIS Mapping/ Property Ownership Manager, Maricopa County Assessor's Office, Phoenix, AZ
Phillip Leveille, GIS Specialists Supervisor, Maricopa County Assessor's Office, Phoenix, AZ

Moderators

Leighann Chambliss

Chief Product Officer, Thimgan & Associates

Speakers

Nathan Langdon

GIS Mapping/Property Ownership Manager, Maricopa County Assessor's Office

Nathan Langdon serves as the GIS Mapping and Property Ownership Manager at the Maricopa County Assessor’s Office. Nathan has been in public service for nearly ten years, specializing in the GIS field. He graduated from the University of Arizona with a Bachelor’s Degree in Geography... Read More →

Phillip Leveille

GIS Specialists Supervisor, Maricopa County Assessor's Office

Phillip Leveille serves as the GIS Specialist Supervisor at the Maricopa County Assessor’s Office. A seasoned leader with management experience across sectors and disciplines ranging from healthcare to real estate, Phillip’s diverse background uniquely prepared him to lead a team... Read More →

Tuesday March 4, 2025 2:00pm - 3:30pm EST
Roman Johnson – 3rd Floor

LEADERSHIP & MANAGEMENT

2:00pm EST

Esri Hands-On Learning Lab

Tuesday March 4, 2025 2:00pm - 3:30pm EST

Alfred Tibor- 3rd Floor

Take free self-paced lessons on a variety of GIS and ArcGIS topics. Esri's Hands-On Learning Lab will be at GIS/ValTech 2025.

Tuesday March 4, 2025 2:00pm - 3:30pm EST
Alfred Tibor- 3rd Floor

LEARNING LAB

2:00pm EST

Moneyball for Commercial Real Estate: Sales, Income, and AI Models

Tuesday March 4, 2025 2:00pm - 3:30pm EST

Pheoris West B– 3rd Floor

This session explores the key variables that drive successful commercial sales and income models. It compares sales and income models, examining when each is most appropriate, and highlights the benefits of AI in model formats. The session also offers insights into integrating these models with CAMA systems and addresses challenges in valuing mixed-use buildings by applying location and use-specific rates.

Commercial Sales and Income Models
Robert Gloudemans, FIAAO, Mass Appraisal Consultant, AZ
Valuation of Multi-Purpose Buildings
Kevin Keene, Owner/Operator, Keene Mass Appraisal Consulting, Philadelphia, PA

Moderators

Megan Lukens

Assessment Business Systems Manager, City of Madison

I fell into the assessing world with Tyler Technologies back in 2002. I have had opportunities to work at the jurisdictional level, the county level, and for an oversight agency at the state level. I currently work for the City of Madison, WI as the Assessment Business Systems Manager... Read More →

Speakers

Robert Gloudemans, FIAAO

Mass Appraisal Consultant

Bob is a Mass Appraisal Consultant and longtime partner in the partnership. Almy, Gloudemans, Jacobs & Denne. Previously he worked for IAAO and the AZ Dept of Revenue.Bob provides consulting services in mass appraisal and ratio studies and has assisted over 100 clients in the U.S... Read More →

Kevin Keene

Owner/Operator, Keene Mass Appraisal Consulting

Kevin Keene served the City of Philadelphia for over 30 years as a Real Property Evaluator; Mass Appraisal Analyst; Real Property Supervisor; GIS Manager; Modeling Director and Director of Mass Appraisal and Analysis. He personally designed and directed over sixteen major revaluation... Read More →

Tuesday March 4, 2025 2:00pm - 3:30pm EST
Pheoris West B– 3rd Floor

MODELING & VALUATION

3:30pm EST

Coffee Break in Exhibit Hall

Tuesday March 4, 2025 3:30pm - 4:00pm EST

Aminah Robinson ABC – 5th Floor

Tuesday March 4, 2025 3:30pm - 4:00pm EST
Aminah Robinson ABC – 5th Floor

Coffee Break

4:00pm EST

"From Pixels to Proﬁts: How AI and GIS are Making Property Data Less Boring and a Little Bit Magical"

Tuesday March 4, 2025 4:00pm - 5:00pm EST

Pheoris West A – 3rd Floor

Get ready to ditch those dusty old spreadsheets and embrace the future of property data! This session will take you on a wild ride through the world of AI and GIS, showing you how these powerful tools can turn mountains of data into actionable insights. We'll show you how to teach computers to see like humans (well, almost), uncover hidden property value trends, and even make those pesky stakeholders happy. We'll even throw in some real-world examples to prove that this stuff actually works (no smoke and mirrors here!). So, grab your thinking caps and get ready to transform your property data game!

Strategies to Transform Land Records & Assessment Workflows Using GIS
Kyle Wikstrom, MGIS, GISP, Solutions Director, Pro-West & Associates, Walker, MN

Moderators

Alex Hepp

Director, Assessment, Cyclomedia Technology, Inc.

Imagery. GIS. Assessment. Please consider joining the Conference Committee.

Speakers

Kyle Wikstrom, MGIS, GISP

Solutions Director, Pro-West & Associates

Kyle is the Solutions Director at Pro-West where he is responsible for leading the development and implementation of Geographic Information System (GIS) solutions. His strategic role combines technical expertise, leadership skills, and a deep understanding of GIS applications in numerous... Read More →

Tuesday March 4, 2025 4:00pm - 5:00pm EST
Pheoris West A – 3rd Floor

GIS Technologies

4:00pm EST

Imminent Recession or Extended Expansion?

Tuesday March 4, 2025 4:00pm - 5:00pm EST

Roman Johnson – 3rd Floor

This dynamic presentation serves to outline the six distinctive phases of the American real estate market cycle and chiefly how values of all sectors of real estate assets are either positively or negatively influenced during each disparate phase of the market cycle.

Spinning the Real Estate Market Cycle: Imminent Recession or Extended Expansion
Ronnie Lee Phillips, CIPS, Land Economist/Commercial Real Estate Advisor, Realstar Realty Advisors, LLC, Knoxville, TN

Speakers

Ronnie Lee Phillips, CIPS

Land Economist/Commercial Real Estate Advisor, Realstar Realty Advisors, LLC

Ronnie Lee Phillips received his master of Land Economics and Real Estate degree from Texas A & M University, which is recognized by the Appraisal Foundation and Appraisal Institute. This graduate real estate program consistently ranks in the top three in the US and fifth globally... Read More →

Tuesday March 4, 2025 4:00pm - 5:00pm EST
Roman Johnson – 3rd Floor

LEADERSHIP & MANAGEMENT

4:00pm EST

Esri Hands-On Learning Lab

Tuesday March 4, 2025 4:00pm - 5:00pm EST

Alfred Tibor- 3rd Floor

Take free self-paced lessons on a variety of GIS and ArcGIS topics. Esri's Hands-On Learning Lab will be at GIS/ValTech 2025.

Tuesday March 4, 2025 4:00pm - 5:00pm EST
Alfred Tibor- 3rd Floor

LEARNING LAB

4:00pm EST

SHAPs and Rec: Navigating Valuation with SHAP and Time Trend Methods

Tuesday March 4, 2025 4:00pm - 5:00pm EST

Pheoris West B– 3rd Floor

This session will showcase how machine learning and SHAP values can reveal inequities in property valuations, offering actionable insights into the drivers of disparities. Join this session to also explore a comparison of current time trend methods with the Kalman filter approach for building time adjustments, enhancing valuation accuracy.

Practical Implementation of Rocket Science in Developing Time Trends
Jeremy Eye, Senior Data Analyst, Boulder County Assessor’s Office, CO
Wendell Salas, Senior Data Analyst, Boulder County Assessor's Office, CO
Enhancing Ratio Studies with AI: Identifying Sources of Inequity with SHAP Values
Paul Bidanset, Founder/Research Scientist, Center for Appraisal Research and Technology, Virginia Beach, VA
Joe Werhli, Enterprise Architect, Tyler Technologies

Moderators

Daniel Fasteen, PhD

Senior Research Scientist, Tyler Technologies

Speakers

Jeremy Eye

Senior Data Analyst, Boulder County Assessor’s Office

Wendell Salas

Senior Data Analyst, Boulder County Assessor's Office

Paul Bidanset

Founder/Research Scientist, Center for Appraisal Research and Technology

Paul Bidanset is an international AVM consultant and founder of the Center for Appraisal Research and Technology (CART), a nonprofit dedicated to promoting appraisal equity through free research, workflows, and technology. He has most recently worked with the governments of Moldova... Read More →

Joe Wehrli

Enterprise Architecture Manager, Tyler Technologies

Joseph Wehrli (Joe) is an enterprise architect and computer scientist at Tyler Technologies, where he conducts research and development in property valuation and tax administration systems.Joe has contributed to a wide range of property valuation and tax administration products and... Read More →

Tuesday March 4, 2025 4:00pm - 5:00pm EST
Pheoris West B– 3rd Floor

MODELING & VALUATION

4:00pm EST

Technology Showcase

Tuesday March 4, 2025 4:00pm - 5:00pm EST

Charles Massey – 3rd Floor

Tuesday March 4, 2025 4:00pm - 5:00pm EST
Charles Massey – 3rd Floor

TECHNOLOGY SHOWCASE

5:00pm EST

Exhibitor Showcase & Networking Event

Tuesday March 4, 2025 5:00pm - 6:30pm EST

Aminah Robinson ABC – 5th Floor

Enjoy some refreshments in a relaxed atmosphere, while connecting with our sponsors and exhibitors. Grab some specs, take part in a demo, and find solutions!

Tuesday March 4, 2025 5:00pm - 6:30pm EST
Aminah Robinson ABC – 5th Floor

NETWORKING