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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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

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

Susan Powell-Chehadi

Chief Deputy, Boulder County Assessor’s Office

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

4:00pm EST

It’s Always Sunny AVM’s in the Northeast

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

Pheoris West B– 3rd Floor

This session will present a case study on the 2024 revaluation of Central Falls, a small city with 3,000 parcels, comparing modern revaluation tools like regression and AVM against traditional market-adjusted cost methods. Additionally, we will explore a real estate data visualization tool created for Philadelphia (~ 600,000 parcels) which integrates city and external data sources to support decision-making for various users like homeowners, developers, and city planners.

Central Falls Case Study – Testing Modern Approaches to Value in a Small New England Community
Daniel Ducharme, Ph.D., RICA, Assessor, Central Falls, RI
Creating Value Through Connecting Siloed Big Data
Jimmy Williams, Mass Appraisal Supervisor, Philadelphia Office of Property Assessment, PA
Alex Raju, Supervisor of Analytics, Philadelphia Office of Property Assessment, PA

Moderators

Kevin Keene

Owner/Operator, Keene Mass Appraisal Consulting

Speakers

Jimmy Williams

Mass Appraisal Supervisor, Philadelphia Office of Property Assessment

Jimmy is the Mass Appraisal Supervisor with the Philadelphia Office of Property Assessment (OPA) . He has been with OPA for over 25 years and has held several positions that include Clerical, Residential Assessor, Analyst and now Mass Appraisal Supervisor. His Education includes a... Read More →

Alex Raju, CPE

Supervisor, Philadelphia Office of Property Assessment

Works with the City of Philadelphia - Office Of Property Assessment. From training, to data analytics, to data sciengineer, to modeling, to residential evaluation; he keeps seven of his fingers in various roles. Two he keeps reserved for new roles. One is left at home just in case... Read More →

Daniel Ducharme, Ph.D., RICA

Assessor, Central Falls, RI

Dan is the Director of Software Development for Catalis, responsible for all of their CAMA products such as AssessPro. Not content to just be a vendor, he is also the Tax Assessor for the City of Central Falls since 2020 where he spends 1 day a week keeping on top of all of the appraisal... Read More →

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

MODELING & VALUATION