A06-Digges-Cornwallis2024Topo_0001.pdf
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- 140P4326Q0055
About this file
This document consists of geographic information system (GIS) maps and supporting data tracking the distribution and acreage of golden bamboo (an invasive species) at Colonial National Historical Park across multiple years.
The maps present bamboo coverage at two specific locations within the park: Cornwallis Cave and Digges House. At Cornwallis Cave, the 2023 survey identified 1.85 acres of golden bamboo coverage, shown with blue boundary delineation overlaid on a 2-foot topographic map with federal land designations. At Digges House near Yorktown Battlefield, historical bamboo data spans from 1999 through 2011, with acreage measurements as follows: 1999 (0.269 acres), 2007 (0.922 acres), 2010 (0.967 acres), and 2011 (0.711 acres). The bamboo polygons were created through on-screen digitization from aerial imagery taken at various scales and times of year, with 2011 data supplemented by GPS mapping. The documents note that minor errors may have been introduced during data creation and are intended for illustrative purposes only, not for public distribution. All mapping was conducted by the National Park Service, U.S. Department of the Interior, using the NAD 1983 UTM Zone 18N coordinate system.
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Text version
Federal Land (Fee)
Federal Land (Less than Fee)
Bamboo 2023
2ft Topo
Golden Bamboo at Cornwallis Cave
Colonial National Historical Park
0 25 50
Meters
Notes:
2023: 1.85 acres
DGeyer Pencil these two areas:
Top of Cornwallis cave (1)- lots of downed logs, some bamboo thicker than another. I am trying to protect the outcrop from damage in the mulching mower. Drag the bamboo into the great valley (paper street) and they will get picked up by locals or us.
Below the outcrop bluff (2), its not very dense in here, but there is a transformer in here. You can just drip the bamboo in a couple of piles here.
G re at V al le y Tr ai l
Diggs House
M A
IN
W A
TE
R
C O
M
TE
D E
G R A S S E
Bamboo, 2011 Digges House, Colonial National Historical Park
1:1,000
0 50 10025 Feet
National Park Service U.S. Department of the Interior
Bamboo Year:Acres
1999: 0.269 acres 2007: 0.922 acres 2010: 0.967 acres 2011: 0.711 acres
Note:
Bamboo polygons were "on-screen" digitized from aerial imagery. The aerials were taken at at various scales and time of year.
Some minor error may be introduced in the creation of this data set.
Aerial: 2007 2011 Bamboo was mapped by GPS
Printin g Date: Tuesday, September 14, 2010 File: bambo o 1999 2007 and 2010.mxd Coordinate System: NAD 1983 UTM Zone 18N Illustrative purp oses only. Not for public view.
York River
Yorktown Battlefield
File details come from the government source that posted it. Updated .