D.C. and Chesapeake Bay regional landscape

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A LIDAR-based shaded relief map of D.C. 31 October 2023
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Blackwater in high winds 31 October 2023
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Visiting Bodkin Island before it slips under the waves 23 August 2023
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Wild rice at Jug Bay 6 November 2022
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Tred Avon 15 May 2022
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Elk Neck 27 May 2021
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Along the Patapsco at Ilchester 7 March 2021
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Patuxent River State Park 25 June 2020
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The Baltimore rail network 22 April 2020
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Franklin Point 2 September 2019
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Hillen Terminal, Baltimore, Maryland 26 November 2018
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Marshes at Jug Bay 26 August 2018

On the Patuxent River

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Baltimore harbor and tributaries 10 July 2018

A map of Baltimore's rivers and creeks

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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 and Maryland Railroad Lines 13 June 2016
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The Brewer’s Archipelago and Distillery Islands, 2015 21 August 2015

Updated map of DC's distilleries and breweries

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More D.C. streams in 1859 Updated 28 February 2016

Uncovering long-lost historic hydrologic features.

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Rock Creek Trails 25 May 2015
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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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The Brewer's Archipelago and Distillery Islands 11 February 2014

Mapping DC's distilleries and breweries

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Swampoodle is back on Google Maps 5 October 2013

Chalk one up for historic neighborhood names

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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.