Sources

• Each path was drawn and measured by me in Google Earth, then saved to a Google My Map. The lines on every map here come straight from that map's KML file.
• The hub outlines are traced from my Google Earth hubs map, lined up with OpenStreetMap using landmarks (Silver Lake, nearby ponds, and I-93).
• Walk times use a pace of about 20 minutes per mile.

• Streets, rail lines, water, parks, woods, the town line, and the places listed in each hub: © OpenStreetMap contributors, downloaded through the Overpass API in November 2026.
• Highway mileage on The Problem page is measured along Routes 38, 62, and 129 inside the town line in that same data, with shared stretches counted once.
• Some places were double-checked against business listings (for example, McKinnon's Market on Lowell Street and Windsor Place on West Street).

• The hill charts on the Methodology page use ground heights every 40 meters along each path from the USGS 3D Elevation Program (1-meter lidar), through the Elevation Point Query Service.
• The elevation numbers in the text come from Google Earth's elevation profiles.

• Walks follow the OpenStreetMap street network. “Today” is the shortest walk on the streets. “With the paths” adds the five paths and counts busy roads (state routes) as 1.5 times as long.
• The routes don't know where sidewalks exist or about informal shortcuts, so they're for comparing, not for directions.

• Tri-Community Greenway (Woburn, Winchester, Stoneham), 6.63 miles, opened in June 2019 as a $5 million MassDOT project: Stoneham Patch and TrailLink.
• Town of Wilmington Planning & Conservation Department.

The aerial photos are my own drone shots of Wilmington. Path drawings are screenshots of my Google Earth work (imagery © Google and its providers).

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