D.C. and nearby

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New lost streams map: Slash Run and Brown’s Run 28 November 2023
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A LIDAR-based shaded relief map of D.C. 31 October 2023
The Census, checkboxes, and multiracial identity 10 February 2023
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A modeshare snapshot of 17th St. NW 5 June 2018

A modeshare snapshot

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CSO #043, Rock Creek, D.C. 3 June 2018

Combined sewer overflow

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Rock Creek in the snow, D.C. 21 March 2018

An early-spring snowstorm

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Eckington, D.C. 2 January 2018

Former printing plant off the Met Branch

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Imagining a safer 18th St. NW 12 June 2017

Tools to envision different street layouts

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DC–Baltimore Railroads and Terrain 25 May 2015
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Anacostia River at Bladensburg, Md. 30 June 2014

Floodgates, levees, and marshes

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Blue 6 June 2014

Hana Market, Adams Morgan

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The Brewer's Archipelago and Distillery Islands 11 February 2014

Mapping DC's distilleries and breweries

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SE/SW Waterfront 26 September 2013

Pictures from the SE/SW waterfront area

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DC streams in 1859, plotted on a modern map 7 July 2013

Uncovering long-lost historic hydrologic features.

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Really big pipes 24 May 2013

Preview of the Hidden Rivers and Lost Neighborhoods bike tour.

Lost Watercourses of D.C. 23 May 2013

Maps of DC's long-lost rivers.

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Gardens on a rainy Saturday 18 May 2013

A tour of four gardens in NW DC – a fine way to spend a drizzly Saturday.