This document discusses how GIS can be used to assess trees and develop conservation plans. It outlines a GIS data model for tree assessment that incorporates health, hazard, soil, water, and maintenance data. Health is assessed using a standardized protocol that assigns condition ratings. Hazard is assessed using an ISA protocol. Additional analyses like rare/endangered holdings, pest distribution, and condition by species can inform replacement strategies. Current examinations focus on health and hazard data, but incorporating other data will allow for a long-term conservation plan to secure future funding and determine needs. GIS provides a standardized framework that can reveal patterns to effectively manage collections and plan conservation.