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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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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
avatar for Daniel Fasteen, PhD

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
JE

Jeremy Eye

Senior Data Analyst, Boulder County Assessor’s Office
WS

Wendell Salas

Senior Data Analyst, Boulder County Assessor's Office
avatar for Paul Bidanset

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 →
avatar for Joe Wehrli

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

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