UFD

Washington DC Grows Green

| Kevin McMaster

Data, Heat, and Trees: How GIS Helped Washington, DC Grow Green Where It Matters Most

A newly published national study on urban greenery just delivered remarkable news: Washington, DC recorded the largest size-adjusted increase in urban greenery among 33 major U.S. cities between 2013 and 2022.

Even more significant is that DC’s hottest neighborhoods gained more greenery than its coolest neighborhoods. In a national landscape where most cities are losing vegetation (especially in heat-vulnerable areas), the District reversed the trend.

This didn’t happen by accident. And it didn’t happen by planting trees randomly. It happened because planting decisions were guided by data.

The National Context: A Troubling Pattern

The study, led by urban heat researcher Vivek Shandas, found:

  • 73% of cities analyzed experienced an overall decline in greenery.
  • The hottest neighborhoods were typically losing greenery the fastest.
  • Canopy inequity is increasing in most urban areas.

Washington, DC stood apart. Not only did the city increase greenery overall, it was one of only three cities where hotter neighborhoods gained more greenery than cooler ones – and the only city where the gain exceeded 20% in its hottest areas. That is a measurable reversal of a national environmental equity trend.

The Role of GIS: Moving From Planting to Strategy

For more than two decades, the District Department of Transportation (DDOT) Urban Foresty Division has invested in a highly intentional urban forestry program. A core component of that effort has been the sustained use of Esri’s ArcGIS platform to analyze conditions, identify opportunities, and guide resource allocation.

SymGEO has supported that work over the last 8 years by helping structure and operationalize the analytics behind those decisions.

The work has included:

  • Mapping canopy change over time
  • Analyzing urban heat distribution and vulnerability
  • Identifying planting gaps within the public right-of-way
  • Integrating operational tree data with spatial equity metrics
  • Supporting defensible, transparent prioritization frameworks

Rather than asking “Where can we plant trees?” the analysis reframed the question to: “Where will planting have the greatest long-term environmental and equity impact?”

GIS allowed DDOT to see patterns that are invisible without spatial analysis – and to align investments accordingly.

The Results: Quantifiable Impact

The national study confirms what sustained, data-informed planning can accomplish:

  • Washington, DC had the largest greenery increase when adjusted for city size.
  • The hottest neighborhoods gained 28% more greenery than the coolest neighborhoods.
  • On average, the hottest areas gained 4% more greenery per grid cell – roughly 900 square meters of additional vegetation.
  • DC was one of only two cities where greenery loss in the hottest neighborhoods remained below 10%.

These outcomes align with steady increases in tree canopy within the public right-of-way since 2006. Importantly, this reflects long-term consistency – not a one-year initiative.

Why This Matters

Urban heat is infrastructure stress, and tree canopy is climate infrastructure. When planting decisions are driven by spatial analytics instead of intuition, cities can:

  • Reduce heat vulnerability
  • Address inequitable canopy distribution
  • Improve air quality and stormwater performance
  • Maximize return on public investment

Technology alone doesn’t plant trees, but technology can ensure they’re planted where they matter most.

The Bigger Lesson

This story is not about a single dataset or a single program. It’s about what happens when:

  • Agencies commit to long-term data governance
  • Spatial analysis informs operational workflows
  • Equity metrics are embedded into decision-making
  • Progress is measured over time

GIS becomes more than mapping – it becomes a strategic planning framework. The Washington, DC results demonstrate that when cities combine sustained operational excellence with rigorous spatial analytics, measurable climate equity outcomes are possible.

At SymGEO, we’re proud to support that kind of work – helping public agencies translate data into durable environmental impact.

The work is ongoing, the analysis continues, and the canopy keeps growing. More information at: https://trees.dc.gov/pages/dc-national-leader

Images used courtesy of DDOT Urban Forestry Division

Arborist Workload Optimization

| Kevin McMaster

DDOT’s Urban Forestry Division (UFD) is the primary steward of Washington, D.C.’s ~175,000 public trees and has a mission of keeping this resource healthy, safe, and growing. At the front lines of this work is a team of almost twenty Urban Foresters who have district boundaries within which they provide tree services, inspections, special tree permit processing, and work order generation for tree planting, pruning, and removals as well as other daily responsibilities. As the tree canopy composition and jurisdictional boundaries change over time, workload optimization between arborists is key to keeping the process flowing smoothly. To help provide visibility into current workloads and explore proposed re-districting options, SymGEO worked with DDOT to build an Arborist Workload Dashboard using ArcGIS Dashboards technology.

The dashboard leverages Arcade expressions to aggregate workload components by arborist teams and proposed arborist boundaries, as well as display the proportional work per boundary sub-area.

Information is also aggregated to geographic boundaries, including Wards, Advisory Neighborhood Commissions (ANCs), and Single-member Districts (SMDs). Interactive charts allow exploration on a local, neighborhood-scale level as needed.

To facilitate the exploration and balancing of workloads, the final component of the dashboard allows interactive boundary area selection and workload summarization by individual components. With a balanced target in mind, the Supervisory Urban Forester can explore scenarios and then update the online information to reflect the preferred boundary scenario.

“This is really slick, thank you! I have already been editing in a webmap, and watching things balance out on the dashboard. Very cool, thank you again!”

-DDOT Supervisory Urban Forester

Talk to SymGEO industry experts today if your agency or organization is interested in leveraging ArcGIS Dashboards to re-district boundaries and optimize workloads – we are certified experts and here to help.

DC Trail Ranger QuickCapture

| Kevin McMaster

Trail Rangers are a consistent and helpful presence on DC’s mixed-use, paved trails, charged with assisting trail users, improving trail conditions, and working with local agencies to keep the trails clean, bright, and clear of obstacles. This amazing nonprofit program, run by the Washington Area Bicyclist Association (WABA), is made possible through a grant from the District Department of Transportation’s Urban Forestry Division, and was featured in the Esri case study “GIS-Driven Initiatives Promote Active Transportation in Washington, DC“.

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To help facilitate the data collection process and quantify work efforts, SymGEO was pleased to configure and deploy an ArcGIS QuickCapture application for the DC Trail Ranger team. Every trail service, maintenance task, work order request, or trail-side event is now captured by location with optional notes or photographs and tagged to the appropriate trail.

To assist with task management, the collected data was used to populate an internal ArcGIS Dashboard that lists all tasks and events by Trail Ranger and the date of the event. A public-facing version of the dashboard allows great visibility into all the activities undertaken by the Trail Rangers to better DC’s collective trail experience.

“As a field team that does a wide variety of outreach and maintenance tasks, ArcGIS QuickCapture has been great for record-keeping and storytelling of program impact. I can confidently say that staff stopped to sweep up broken glass in February 97 times!”

– Trail Ranger and Outreach Director, Washington Area Bicyclist Association

Talk to SymGEO industry experts today if your agency or organization is interested in data collection with the power of Esri’s ArcGIS QuickCapture technology –  we are an award-winning, certified Esri business partner and are here to help.

Urban Tree Canopy Change Storymap

| Kevin McMaster

DDOT’s Urban Forestry Division (UFD) is the primary steward of Washington, D.C.’s ~175,000 public trees and has a mission of keeping this resource healthy, safe, and growing. Among many other benefits, these trees improve our air and water quality, cool our neighborhoods, and provide critical habitat for many animals. While D.C.’s Urban Tree Canopy (UTC) is already at an impressive 38%, the UFD has a goal of 40% by 2032. To learn more about the gains and losses experienced during the journey to 40%, SymGEO recently partnered with the UFD to create a StoryMap that explores example areas throughout D.C. and lays out the steps needed to reach the 40% canopy coverage goal.

This mobile-responsive story begins with an overview of the current canopy coverage in DC and explores select examples detailing areas of loss and areas of gain.

Areas of loss are typically due to commercial developments, new residential developments, supporting road and transportation infrastructure, or individual tree loss due to natural causes or storm damage. 

Areas of gain can be attributed to plantings along commercial corridors, or in new residential developments to help alleviate the urban heat island effect, or due to the natural growth of trees over time.

Finally, a call to action is made for homeowners to request their own free shade-providing tree, or to report an open planting box ready for a new tree.

Talk to SymGEO industry experts today if your agency or organization is interested in community engagement with the power of Esri’s ArcGIS StoryMap technology –  we are a certified Esri business partner and are here to help.