USGS 201601 Unknown Vector Data Leading Edge Geomatics (LEG) collected 994 square miles in the Virginia counties of Accomack and Northampton. The nominal pulse spacing for this project was 1 point every 0.7 meters. Dewberry used proprietary procedures to classify the LAS according to project specifications: 0-Never Classified, 1-Unclassified, 2-Ground (bare earth points identified as Model Key Points are flagged with the Model Key Point bit), 7-Low Noise, 9-Water, 10-Ignored Ground due to breakline proximity, 17- Bridge Decks, 18-High Noise. Dewberry produced 3D breaklines and combined these with the final LiDAR data to produce seamless hydro flattened DEMs for the project area. The data was formatted according to the VBMP tile naming convention with each tile covering an area of 5,000 feet by 5,000 ft. A total of 1375 LAS tiles and 1310 DEM tiles were produced for the entire project. The purpose of this LiDAR data was to produce high accuracy 3D elevation products, including tiled LiDAR in LAS 1.4 format, 3D breaklines, and 2.5 foot cell size hydro flattened Digital Elevation Models (DEMs). All products follow and comply with USGS Lidar Base Specification Version 1.2. A complete description of this dataset is available in the Final Project Report submitted to the USGS. 20150411 20150424 ground condition Complete As needed -76.093949 -75.227100 38.064707 37.062181 None DTM Elevation LiDAR LAS DEM Hydro Flattened Breaklines None Virginia Eastern Shores Accomack County Northampton County USA None This data was produced for the USGS according to specific project requirements. This information is provided "as is". Further documentation of this data can be obtained by contacting: USGS/NGTOC, 1400 Independence Road, Rolla, MO 65401. Telephone (573) 308-3810. USGS USGS NGTOC mailing and physical address

1400 Independence Road

Rolla MO 65401 USA (573) 308-3810 pemmett@usgs.gov Microsoft Windows 7 Enterprise Service Pack 1; ESRI ArcCatalog 10.3 The LAS Extent shapefile represents the rectangular bounding coordinates of each LiDAR tile in LAS format that has been delivered for the project. The LAS Extents cover the project boundary. These LAS extents represent all LiDAR tiles where LiDAR data was collected and processed for this project. The LAS extent shapefile itself does not have a tested or produced to meet horizontal positional accuracy. The LAS extent shapefile is created as part of the final QC when all LAS header, variable length records, and point data information is verified. The LAS extent shapefile represents the rectangular bounding coordinates of every LiDAR tile. It is used to make sure that the project has complete coverage. 2D polygon 201601 Final 2D polygon Dewberry - Geospatial Services Group Elise MacPherson Project Manager mailing and physical address

1000 N. Ashley Drive, Suite 801

Tampa FL 33602 USA 813.421.8647 813.225.1385 emacpherson@dewberry.com 8:00 - 5:00 EST Vector G-polygon 1375 Lambert Conformal Conic (State Plane Virginia South FIPS 4502) 36.766 37.966 -78.5 36.333 11482916.666 3280833.333 coordinate pair 0.000100 0.000100 U.S. survey feet North American Datum of 1983(2011) Geodetic Reference System 80 6378137.000000 298.257222 North American Vertical Datum of 1988 (Geoid 12A) 0.000100 U.S. survey feet Explicit elevation coordinate included with horizontal coordinates LAS Extent Shapefile 2D polygon depicting LAS bounding coordinates for each LiDAR tile U.S. Geological Survey FID Internal feature number ESRI Sequential unique whole numbers that are automatically generated. SHAPE Feature geometry. ESRI Coordinates defining the features. ID Project ID Dewberry whole positive number value tileNo Tile Name Dewberry String nbPt total number of point returns in las tile. Dewberry Positive real numbers that are automatically generated. nbPt_ret1 total number of first return points in las tile. Dewberry Positive real numbers that are automatically generated. nbPt_ret2 total number of second return points in las tile. Dewberry Positive real numbers that are automatically generated. nbPt_ret3 total number of third return points in las tile. Dewberry Positive real numbers that are automatically generated. nbPt_ret4 total number of fourth return points in las tile. Dewberry Positive real numbers that are automatically generated. nbPt_ret5 total number of fifth return points in las tile. Dewberry Positive real numbers that are automatically generated. Xmin Minimum X extent of the las tile. Dewberry Positive real numbers that are automatically generated. Xmax Maximum X extent of the las tile. Dewberry Positive real numbers that are automatically generated. Ymin Minimum Y extent of the las tile. Dewberry Positive real numbers that are automatically generated. Ymax Maximum Y extent of the las tile. Dewberry Positive real numbers that are automatically generated. Zmin Minimum Z value in the las tile. Dewberry Positive real numbers that are automatically generated. Zmax Maximum Z value in the las tile. Dewberry Positive real numbers that are automatically generated. USGS Program Manager mailing and physical address

1400 Independence Road

Rolla MO 65401 USA (573) 308-3810 pemmett@usgs.gov Downloadable Data This data was produced for the USGS according to specific project requirements. This information is provided "as is". Further documentation of this data can be obtained by contacting: USGS/NGTOC, 1400 Independence Road, Rolla, MO 65401. Telephone (573) 308-3810 201601 USGS Elise MacPherson USGS NGTOC mailing and physical address

1400 Independence Road

Rolla MO 65401 USA (573) 308-3810 emacpherson@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile