Chesapeake Bay region

Winding down at the Frederick Douglass Bridge 11 November 2024

Fall on the Rhode River 26 October 2024

Putting a name to Blagden Run 24 January 2024

A little D.C. stream

Blackwater in high winds 31 October 2023

Visiting Bodkin Island before it slips under the waves 23 August 2023

Eastern Bay/Eastern Shore of Maryland

Wild rice at Jug Bay 6 November 2022

Bivariate choropleth study, poverty and inequality in Maryland 9 June 2022

Elk Neck 27 May 2021

Along the Patapsco at Ilchester 7 March 2021

The Baltimore rail network 22 April 2020

Baltimore harbor and tributaries 10 July 2018

A map of Baltimore's rivers and creeks

DC and Maryland Railroad Lines 13 June 2016

The Brewer’s Archipelago and Distillery Islands, 2015 21 August 2015

Updated map of DC's distilleries and breweries

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

Uncovering long-lost historic hydrologic features.

Rock Creek Trails 25 May 2015

DC–Baltimore Railroads and Terrain 25 May 2015

Anacostia River at Bladensburg, Md. 30 June 2014

Floodgates, levees, and marshes

Swampoodle is back on Google Maps 5 October 2013

Chalk one up for historic neighborhood names