The Soil Principle

Approach

Why we start underground — and the data infrastructure behind every number we publish.

The Soil Principle

Most people look at the canopy. We start underground.

Everything visible above ground — every branch, every leaf, every dollar of ecosystem value — depends on what's happening below. If the system underneath is out of balance, no above-ground intervention will hold.

1

Diagnose first

Full ecosystem assessment before any prescription. Soil, roots, hydrology, structure — the whole system.

2

Work with nature

Regenerative, nature-based solutions. Systems that get stronger over time, not weaker.

3

Data, not assumptions

Peer-reviewed research. Live ArcGIS parcel data. Calculations traceable to the source paper.

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Land value is ecosystem value

Your property's trees and green infrastructure generate measurable economic returns every year.

+7%
Green Premium (Kovacs 2022)
—
Half-Acre Parcel · 45% Canopy
$145K
30-Year Projection (illustrative)
2.6t
CO2 / Acre (Atlanta iTree)

The same methodology powers TerraValue, the AVM product founded out of P&X. Visit TerraValue →

What We've Built

P&X built TerraValue.

TerraValue is the first ecosystem-aware AVM — parcel-level USPAP three-approach reconciliation that prices canopy, soil, and natural assets. Built for AVM data vendors, lenders, GSEs, and real estate platforms. The same methodology informs every P&X consulting engagement.

Visit TerraValue →
Live engine pull · /api/score calling…
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/ 100
Atlanta Soil Score
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P&X consumes the same public endpoint TerraValue exposes. Atlanta canopy 45.7% (City of Atlanta Urban Tree Canopy Assessment, 2023 imagery; Georgia Tech, released Aug 2026) + park access 84.6% (TPL ParkScore 2026); other factors omitted at city scale, so confidence reads accordingly.

Under the Hood

The data infrastructure behind the numbers

Real-time public ArcGIS endpoints, peer-reviewed research, and institutional knowledge — wired together.

Calculation Sources

USDA Forest Service EPA SC-GHG 2023 iTree Eco Nowak et al. 2014 McPherson 2003 Kovacs et al. 2022 Troy & Wilson 2006 Rennert et al. (Nature 2022)

Data Pipeline

Nominatim geocoding City ArcGIS REST County ArcGIS fallback Esri satellite basemap Leaflet mapping jsPDF report export

Ecosystem Services

Carbon sequestration Stormwater management Air quality improvement Energy savings Habitat value Property value premium
ISA Certified Arborist
Urban Forest Specialist
TRAQ Certified
ISA Credentialing Council
GA Arborist Assoc. Board