one inch topographic map for americas first cemetery memorial park
DESCRIPTION
This is a draft research map prepared by Eymund Diegel to test the accuracy of a new City data set - laser derived topographic modeling. It looks at the usefulness of the innovative 2010 Light Detection and Ranging 3 Dimensional Model for New York City, also known as “LIDAR”, where laser beams on airplanes are used to create an extremely high resolution terrain model. The test site was a seemingly flat concrete slab at 170 8th Street, next to Third Avenue. Grassroots Balloon Aerial Mapping showed crack patterns in the concrete slab prompting further research. An unusual pattern of “mounds” may reflect the site’s rumored past history as a burial site.TRANSCRIPT
0 20 Feet
north
ONE INCH TOPOGRAPHIC CONTOUR MAP 170 8TH STREET "MARYLANDER BURIAL GROUND" SITE
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9TH STREET
8TH STREET
DATA TEST: Contour modeling using ArcGIS on the 2010 LIDAR NYC Digital Elevation Model, wich has a vertical accuracy of 0.157 feet (0.048m) and horizontal accuracy of 1.87 feet. Unusual mounds less than an inch high on the otherwise flat concrete slab can be compared to the person lying on the ground in the aerial.These “mounds” most likely reflect old building foundations or buried pipes, but could also be something more interesting. This parcel occupies the former site of “Marylander Hill”, a 24 foot high promontory in the historic Gowanus marshes. The hill has been associated with colonial burials and a 1776 Revolutionary War Cemetery (The Marylander Burial Ground), recorded as having been near 3rd Avenue & 8th Street, based on a 1956 National Parks Service Archeological Report.Despite having been built over by chemical works and and a knitting mill, the rumoured burial site was never excavated.Research map prepared by Eymund Diegel, [email protected], 31 December 2012, as a data evaluation test for community discussion.Aerial Base: 2010 NYC Base Map aerial with a high resolution Gowanus Canal Conservancy Grassroots Mapping July 2012 “Over My Dead Body” Balloon AerialTo find out more about research on the site visit Public Laboratory: Raising The Dead - Grassroots Mappers help look for America’s First Veterans Cemeteryhttp://publiclaboratory.org/notes/eymund-diegel/11-9-2012/raising-dead-grassroots-mappers-help-look-america-s-first-veterans-cem
PENSIVE ON HER DEAD GAZING
Pensive on her dead gazing I heard the Mother of All,Desperate on the torn bodies, on the forms covering the battlefields gazing,(As the last gun ceased, but the scent of the powder-smoke linger'd,)As she call'd to her earth with mournful voice while she stalk'd,Absorb them well O my earth, she cried, I charge you lose not my sons, lose not an atom,And you streams absorb them well, taking their dear blood,…In unseen essence and odor of surface and grass, centuries hence,In blowing airs from the fields back again give me my darlings, give my immortal heroes.
Walt Whitman (1819-1892)