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.

Go here to access the Uniform Request for Recertification.

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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9:00am EST

Cracking the Code of Vertical Inequity

Wednesday March 5, 2025 9:00am - 10:00am EST

Pheoris West B– 3rd Floor

This session will address the often-overlooked challenge of selecting the best market value proxy when detecting vertical inequity in mass valuations. Using a real-world dataset and Monte Carlo simulations, the presentation will demonstrate how bias varies with different proxies. Finally, a new statistical market value proxy will be introduced to improve valuation accuracy.

Proposing a New Market Value Proxy for Vertical Inequity Detection
Josh Myers, Mass Appraisal Consultant, Josh Myers Valuation Solutions, Chesapeake, VA

Moderators

Tim Boncoskey

Assistant Assessor/Recorder/County Clerk, San Diego Assessor/Recorder/County Clerk

Speakers

Josh Myers

Mass Appraisal Consultant, Josh Myers Valuation Solutions

Josh is a mass appraisal consultant with Josh Myers Valuation Solutions which offers various consulting solutions in the mass appraisal field, including valuation model development and ratio studies. He is an IAAO Award Winner, a member of IAAO Editorial Review Board, and a current... Read More →

Wednesday March 5, 2025 9:00am - 10:00am EST
Pheoris West B– 3rd Floor

MODELING & VALUATION

10:30am EST

Game of Homes: Navigating Valuation Factors and Hidden Risks

Wednesday March 5, 2025 10:30am - 12:00pm EST

Pheoris West B– 3rd Floor

Valuation is coming! This session covers key factors in valuation, including location, time adjustments, square footage, construction quality, and property condition, providing practical guidance for assessors to improve their methods and avoid common pitfalls. This session also examines how proximity to residential meth labs affects nearby property values in Albuquerque using GIS and spatial regression techniques.

Is There a Heisenberg Effect? Using GIS to Investigate the Impact of Residential Meth Labs on Nearby Property Values in Albuquerque, NM
Damian Lara, Esq., Residential Manager, Bernalillo County Assessor’s Office, NM
Fabian Montoya, Deputy Assessor, Bernalillo County Assessor’s Office, NM
Paul Bidanset, Founder/Research Scientist, Center for Appraisal Research and Technology
Model Mastery: Five Characteristics That Make or Break Your Model
Jake Parkinson, Assessor Consultant, Valuebase, Salt Lake City, UT

Moderators

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 →

Speakers

Damian Lara, Esq.

Assessor, Office of the Bernalillo County Assessor

Damian R. Lara brings a wealth of experience and unique perspective to his role as Bernalillo County Assessor. His experience as a young person working the fields in southeastern New Mexico and exposure to stark differences in the quality of life among neighboring communities inspired... Read More →

Fabian Montoya

Deputy Assessor, Bernalillo County Assessor’s Office

Mr. Fabian M. Montoya, Residential Manager at the Bernalillo County Assessor’s Office, is responsible for fairly and equitably assessing approximately 250,000 parcels. On average 10,000 parcels change ownership, 5,500 building permits are issued, and 4,000 property owners protest... Read More →

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 →

Jake Parkinson

Assessor Consultant, Valuebase

Jake Parkinson is currently Assessor Coordinator for Valuebase. Most recently he was the Tooele County Assessor, but he also holds a Certified Residential Appraiser License with Utah Division of Real Estate and an Ad Valorem General Designation from Utah State Tax Commission. He is... Read More →

Wednesday March 5, 2025 10:30am - 12:00pm EST
Pheoris West B– 3rd Floor

MODELING & VALUATION

2:30pm EST

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

Wednesday March 5, 2025 2:30pm - 3:30pm 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 Wehrli, Enterprise Architect, Tyler Technologies

Moderators

Daniel Fasteen, PhD

Senior Research Scientist, Tyler Technologies

Speakers

Jeremy Eye

Senior Data Analyst, Boulder County Assessor’s Office

Jeremy Eye is a Senior Data Analyst/Modeler for the Boulder County Assessor’s Office, where he has worked for the last year building property valuation models and researching novel approaches to mass appraisal. He spent his early career engaged as a proprietary trader in the commodity... Read More →

Wendell Salas

Senior Data Analyst, Boulder County Assessor's Office

Wendell Salas is Senior Data Analyst and Modeler for the Boulder County Assessor’s Office, where he has worked for over 3 years. He develops residential and commercial models for Boulder County and works with the Assessor’s staff to improve data collection, quality, and integrity... Read More →

Paul Bidanset

Founder/Research Scientist, Center for Appraisal Research and Technology

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 →

Wednesday March 5, 2025 2:30pm - 3:30pm EST
Pheoris West B– 3rd Floor

MODELING & VALUATION