Hydrography Lines 2015

Hydrography lines. The dataset contains polygons representing planimetric hydrography, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO). This is a complete new capture from aerial photography flown in mid to Late April, completed on April 24, 2015. This is part of a comprehensive sensor collection effort to sychronize orthophotos, oblique imagery, LiDAR, and basemap layers. The following planimetric layers were updated: - Barrier Lines- Building Polygons- Bridge and Tunnel Polygons- Curb Lines- Grate Points- Horizontal and Vertical Control Points- Hydrography Lines- Obscured Area Polygons- Railroad Lines- Road, Parking, and Driveway Polygons- Sidewalk and Stair Polygons- Swimming Pools- Water PolygonsDUE TO THE LOW ALTITUDE FLOWN TO CAPTURE THE COMPLETE IMAGERY FOR THE 2015 SENSOR FLIGHT, THERE IS INCOMPLETE AERIAL PHOTOGRAPHY COVERAGE AROUND THE WHITE HOUSE AND CAPITOL. FOR THESE AREAS, 2013 PLANIMETRIC FEATURES WERE SEEMLESSLY MERGED INTO THE 2015 DATA.

Data and Resources

Field	Value
accessLevel	public
catalog_@context	https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy	https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier	https://www.arcgis.com/home/item.html?id=0d317a90f8ac4c5c8cc09baed0681f45&sublayer=4
issued	2018-07-19T20:58:32.000Z
landingPage	https://opendata.dc.gov/datasets/DCGIS::hydrography-lines-2015
license	https://creativecommons.org/licenses/by/4.0
metadata_type	geospatial
modified	2021-12-13T20:50:15.000Z
old-spatial	-77.1127,38.7996,-76.9246,38.9877
publisher	D.C. Office of the Chief Technology Officer
resource-type	Dataset
source_datajson_identifier	true
source_hash	0589d26534575077246905b252fcb22a1f27e23d2941411d45880c9c0361587d
source_schema_version	1.1
spatial	{"type": "Polygon", "coordinates": [[[-77.1127, 38.7996], [-77.1127, 38.9877], [-76.9246, 38.9877], [-76.9246, 38.7996], [-77.1127, 38.7996]]]}
theme	{geospatial}
Groups	AmeriGEOSS National Provider North America
Tags	AmeriGEO AmeriGEOSS CKAN GEO GEOSS National North America United States district-of-columbia hydrography planimetrichistoric planimetrics pmetric15 river shoreline washington-dc water
isopen	True
license_id	cc-by
license_title	Creative Commons Attribution
license_url	http://www.opendefinition.org/licenses/cc-by
maintainer	DCGISopendata
maintainer_email	gisgroup@dc.gov
metadata_created	2025-09-29T14:51:46.604753
metadata_modified	2025-09-29T14:51:46.604759
notes	<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Hydrography lines. The dataset contains polygons representing planimetric hydrography, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO). This is a complete new capture from aerial photography flown in mid to Late April, completed on April 24, 2015. This is part of a comprehensive sensor collection effort to sychronize orthophotos, oblique imagery, LiDAR, and basemap layers. The following planimetric layers were updated: </SPAN></P><P><SPAN>- Barrier Lines</SPAN></P><P><SPAN>- Building Polygons</SPAN></P><P><SPAN>- Bridge and Tunnel Polygons</SPAN></P><P><SPAN>- Curb Lines</SPAN></P><P><SPAN>- Grate Points</SPAN></P><P><SPAN>- Horizontal and Vertical Control Points</SPAN></P><P><SPAN>- Hydrography Lines</SPAN></P><P><SPAN>- Obscured Area Polygons</SPAN></P><P><SPAN>- Railroad Lines</SPAN></P><P><SPAN>- Road, Parking, and Driveway Polygons</SPAN></P><P><SPAN>- Sidewalk and Stair Polygons</SPAN></P><P><SPAN>- Swimming Pools</SPAN></P><P><SPAN>- Water Polygons</SPAN></P><P><SPAN>DUE TO THE LOW ALTITUDE FLOWN TO CAPTURE THE COMPLETE IMAGERY FOR THE 2015 SENSOR FLIGHT, THERE IS INCOMPLETE AERIAL PHOTOGRAPHY COVERAGE AROUND THE WHITE HOUSE AND CAPITOL. FOR THESE AREAS, 2013 PLANIMETRIC FEATURES WERE SEEMLESSLY MERGED INTO THE 2015 DATA.</SPAN></P></DIV></DIV></DIV>
num_resources	7
num_tags	17
title	Hydrography Lines 2015