joshdata / adavidramos-dc-landscape-fork

Maps and spatial data for Washington, D.C. landscape history

dc-landscape

Maps and spatial data for Washington, D.C. landscape history.

For narrative updates, see David Ramos's blog.

Boschke Map datasets

Several datasets are digitized from Albert Boschke's 1856–1859 survey and map of the District of Columbia.

data/boschke_1857/hydrography: streams, represented as lines.

data/boschke_1857/water: large water bodies – canals and ponds.

data/boschke_1857/marsh: areas indicated as marsh on the source map. The engravers distinguish between marsh and tidal flats.

Raster data

Raster data are not tracked in Git.

raster_data/boschke_1857/boschke 1857 georef: a scanned copy of the Boschke map, georeferenced as WGS84.

Other datasets

data/springs: estimated locations of historic springs, based on descriptions in Williams. I've used contemporary maps and historic maps to help with the guesswork.

Coordinate system

All data are stored in WGS84, unless otherwise noted.

Sources

Boschke, Albert. Topographical map of the District of Columbia / surveyed in the years 1856 '57 '58 & '59 by A. Boschke. Engraved by D. McClelland, Washington, D.C. Published by D. McClelland, Blanchard & Mohun, Washington, D.C., 1861.

Williams, Garnett P. Washington, D.C.'s Vanishing Springs and Waterways / Geological Survey Circular 752. Arlington, Va.: US Geological Survey, 1977.

Office of the Chief Technology Officer, District of Columbia. DC GIS data.

Contact

David Ramos
[email protected]
@imagineterrain