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23,159 trees. Every one counted.
Each tree individually identified to species, geolocated via GPS, and assessed for diameter, height, estimated age, condition, and native range status.
Every data point is searchable, filterable, and exportable.
23,159 geolocated markers with clustering. Color by condition, site, native status, or size. Satellite imagery toggle. Click any tree for full details.
Search across species names, Latin names, and field notes. Find every oak on campus, or every tree with "dying" in the notes.
Pre-built reports: Heritage Trees (100+ years), Problem Trees, Invasive Species, Largest by DBH, Tallest, Condition by Species, and more.
Every view exports to CSV or JSON. Filter to exactly what you need, then download it. Full API access for developers.
Original KMZ files preserved. The database can regenerate KMZ exports for any site, species, or filtered subset.
Aggregated stats by species: average size, condition, failure rate, and native range status across all sites.
TreeGuy.ai is the work of Tom Eliseuson — a retired geophysicist and former supercomputer sales executive who turned a retirement hobby into one of the most comprehensive independent arboricultural inventories in the region.
Every tree in this database was individually visited, identified to species (with Latin nomenclature), measured for trunk diameter and height, assessed for condition, classified by native range status, and geolocated via GPS. The work spans five sites across Pennsylvania and Virginia, totaling over 23,000 trees and 210+ species — including 253 heritage trees over a century old.
Tom Eliseuson was recognized by the University of Richmond for his volunteer work in the Spatial Analysis Lab with the UR Campus Tree Mapping Project, leading to the addition of 2,175 trees and counting to the inventory database. With a professional background as a geophysicist, Tom has also helped inventory trees at the University of Minnesota, the University of Pittsburgh, and Carnegie Mellon University.