The Lab is privileged to have the support and expertise of a group of individuals with expertise in community and environmental health, geospatial science, and urban planning.
The On Common Ground Framework
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Green Paper
The Common Ground Framework

Parks and green spaces are our common ground. In a time when the United States—and, indeed, much of the world—feels increasingly polarized across political, racial, ethnic and socioeconomic lines, parks offer a much needed space for unification.

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Research Overview
Our Expertise

Whether you want help closing the outdoor equity gap or planning a new park, need guidance about green infrastructure, or seek insights about the value of conserved lands, our experts are ready to work with you.

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Dive into Our
Special Databases">
Dive into Our
Special Databases


  • ParkServe® Data

    We created the country’s most extensive database of local parks in nearly 14,000 cities, towns, and communities to measure equitable access to green space and identify priority areas that need more parks and trails.

    Explore ParkServe

    ParkServe® Data
  • ParkScore® Index

    Our ParkScore index is the most comprehensive comparison of park systems across the U.S. Updated every year, ParkScore ranks 100 of the most populated cities in the country in five categories: equity, access, investment, amenities, and acreage.

    See ParkScore Rankings

    ParkScore® Index
  • LandVote® Database

    Every year, dozens of state and local governments vote to raise public funds in support of land conservation. Our LandVote Database is the premier source of information about these measures, bringing together the most comprehensive history of conservation finance measures on ballots across the country.

    Explore LandVote

    LandVote® Database
  • Conservation Almanac

    Created to assess the impacts of conservation efforts, Conservation Almanac allows you to discover, analyze, and map the results of federal, state, and local funding for conservation since 1998.

    Visit Conservation Almanac

    Conservation Almanac
  • National Conservation Easement Database

    NCED gathers records from both land trusts and public agencies in a public-private partnership.

    This data helps organizations plan more strategically, identify opportunities for collaboration, advance public accountability, and raise awareness of what’s happening in conservation.

    Search NCED

    National Conservation Easement Database
  • Conservation Carbon Map

    This tool helps people make informed decisions about locations with high potential for protecting stored carbon and increasing carbon uptake.

    Explore Carbon Mapping

    Conservation Carbon Map
  • Each year, Trust for Public Land compiles data on parks across the nation’s 100 most populous cities, which represent about 20% of the U.S. population. This dataset aggregates park inventories – investment, acreage, and amenities – across all public and private organizations in each city, making it the most comprehensive dataset of its kind.

    Dive into our City Park Facts