The land value model provided by Tyler (http://mmrc.tylertech.com/_dnn/Portals/0/20160422064601.pdf) is fundamentally flawed; they provide no data showing how they arrived at the data nor any data showing how accurate it is.
Less than 1/3 of residences utilize the land value model shown on the pdf provided on the tyler website. More than 2/3 of residences have “adjustments” or “influence factors” that is only kept on the property card and is not made available publicly on their website.
When asked for this information, Tyler claims that they are not available. When I asked why they were not available – did they delete them and throw them away, the Tyler representative said that yes, they did destroy the information and hung up.