Fugro EarthData, Inc. 20090123 vector digital data Greenwood_Hydrolines withheld 3D hydro breaklines for Greenwood County. The project area is composed of 16 counties in the State of South Carolina - Cherokee, Union, Laurens, Greenwood, Newberry, Chester, Fairfield, Lancaster, Chesterfield, Marlboro, Darlington, Dillon, Marion, Williamsburg, Clarendon, and Orangeburg. The project area consists of approximately 10,194 square miles including a buffer of 50 feet along the edges of the project area and an additional buffer in some areas. The project design of the LiDAR data acquisition was developed to support a nominal post spacing of 1.4 meters. The Fugro EarthData, Inc. acquisition team of Fugro Horizons, Inc. and North West Group acquired 721 flight lines in 44 lifts from January 15, 2008 through February 10, 2008. The data was divided into 5000' by 5000' foot cells that serve as the tiling scheme. LiDAR data collection was performed with a Cessna 310 aircraft, utilizing a Leica ALS50-II MPiA sensor, collecting multiple return x, y, and z data as well as intensity data. LiDAR data was processed to achieve a bare ground surface (Classes 2 and 8). LiDAR data is remotely sensed high-resolution elevation data collected by an airborne collection platform. Using a combination of laser range finding, GPS positioning and inertial measurement technologies, LiDAR instruments are able to make highly detailed Digital Elevation Models (DEMs) of the earth's terrain, man-made structures and vegetation. This metadata file is for the hydroline deliverables for Cherokee County. The purpose of this project is to collect and deliver topographic elevation point data derived from multiple return light detection and ranging (lidar) measurements for a 16-county area in South Carolina. The elevation data will be used as base data for South Carolina's flood plain mapping program (as part of FEMAs Map Modernization Program) and for additional geospatial map products in the future. This data product was made possible by the South Carolina LiDAR Consortium comprised of numerous State, Federal, and local government entities in South Carolina through monetary contributions and in-kind services. en 20090123 publication date Complete Unknown -82.335292 -81.864364 34.413866 33.950706 1597287.872047 1737926.854331 772956.092848 939999.999672 66.590000 211.320000 Keywords LiDAR Bare Earth Terrain Model Elevation Surface 2D Hydro Breakline 3D Hydro Breakline Stream Waterbody Geographic Names Information System US South Carolina Greenwood County Southeast 2008 None The State of South Carolina nor any of its employees is responsible for any imporoper or incorrect use of the information described and/or contained herein, and assume no responsibility for the use of the information. ESRI ArcCatalog 9.3.1.3000 None. Acknowledgement of the South Carolina LiDAR Consortium would be appreciated in products derived from these data. mailing and physical address

1000 Assembly Street

Columbia South Carolina 29201 United States 803-734-9494 803-734-7001 scurryj@dnr.sc.gov Monday - Friday 8:30 AM - 5:00 PM http://www.dnr.sc.gov/gis Mr. Jim Scurry South Carolina Department of Natural Resources Technology Development Program Director File Geodatabase Feature Class The hydro breaklines were derived from the bare earth data returns; the following methods were used to assure lidar accuracy; 1. Use of IMU and ground control network utilizing GPS techniques, 2. Use of airborne GPS in conjunction with the acquisition of lidar, 3. Measurement of quality control ground survey points within the finished product. The boresight of the lidar was processed against the ground control for Newberry County which consisted of 11 lidar ground survey points, Fairfield County which consisted of 11 lidar ground survey points, Chester County which consisted of 9 lidar ground survey points, Union County which consisted of 7 lidar ground survey points, and 1 airborne GPS (ABGPS) base station at the operation airport(s). The horizontal datum for the control was the North American Datum of 1983, 2007 adjustment (NAD83/2007). The vertical datum was the North American Vertical Datum of 1988 (NAVD88). The Geoid 2003 model was used to transform the ellipsoidal heights to GPS derived orthometric heights. ABGPS data was collected during the acquisition mission for each flight line. During the data acquisition the Positional Dilution of Precision (PDOP) for the ABGPS was monitored. The control points were measured by technicians using Terrascan and Fugro EarthData proprietary software and applied to the boresight solution for the project lines. 3D vector line work was filtered using automated procedures followed by manual editing to ensure no zero elevations were found. The hydro breaklines are complete for rivers, streams, lakes, ponds, and reservoirs. The vector line work is hydrologically correct demonstrating a continuous dendritic network, flowing downhill. It is topologically correct, without dangles except at network inputs and outfalls. Lakes, ponds, and reservoirs reflect level surfaces. The minimum expected horizontal accuracy was tested during the boresight process of the lidar source data to meet or exceed the National Standard for Spatial Data Accuracy (NSSDA). Horizontal accuracy is 1 meter RMSE or better. Fugro EarthData, Inc. 20081113 Unknown Internal network 20080923 20081113 20081027 20080919 publication date Bare earth lidar As a component of the South Carolina 16 County Lidar project, Fugro EarthData, Inc. produced bare earth lidar points and tins/hillshades derived from bare earth lidar points within the Cherokee County, SC project area. These were used as a reference source to collect the 2D hydro breaklines. South Carolina Department of Natural Resources Unknown Unknown External hard drive 20031210 20060509 20050304 20060612 Publication Date Greenwood County Orthos The State of South Carolina, Department of Natural Resources provided digital orthophotography covering the project area in support of this project. The following describes the 2D hydro line collection process. Step 1) Hydro lines are digitized using a combination of reference sources including lidar points, tins/hillshades derived from bare-earth lidar points, and orthophotography. Digitized linework is classified into three features; 1) narrow "single-line" streams (consistently < 50' or 15m wide), 2) approximate banks of wider streams and water bodies - lakes, ponds, reservoirs (consistently > 50' or 15m wide), 3) estimated centerlines of wider streams and water bodies ("single-line" stream connector lines). The single-line streams and stream connector lines, taken together, form a complete, unbroken, dendritic drainage network. Unlike traditional mapping, these lines will depict water flow even in locations where the actual path is not visible in the imagery (e.g. culverts under roads, streams under bridges, and pipes through dams). Step 2) Hydro lines are grouped by pre-defined sub-basinregions for automated checks. Step 3) Hydro line sub-basins are run through an automated routine to check for feature and topology issues including classification item present in linework featureclass, valid classification attributes, dangles in banklines (ponds, river, closure line), closed waterbodies under a user-defined area size (small waterbodies), linework under a user-defined length, cycles (polygons) in network (single line streams, centerlines), dangles (disconnects) in stream connector lines, single line stream features inside waterbody polygons. Any issues found are corrected and process is repeated until all issues are resolved. Step 4) Using network analysis, all linework is flipped toward a user-defined outflow segment in the drainage network. Any linework not connected to an outflow segment will be flagged so that it can be manually connected to the network. After disconnected linework is corrected, the process is re-run to ensure connectivity of all linework in the network. withheld withheld 20081217 withheld Becky Jordan Fugro EarthData, Inc. Project Manager mailing and physical address

7320 Executive Way

Frederick MD 21704 301-948-8550 301-963-2064 bjordan@earthdata.com Monday through Friday, 8:30am to 5:00pm The following describes the classification of lidar to water process. Step 1) Waterbody and island polygons are created from banklines. Step 2) Lidar tiles are processed to classify points falling within waterbody polygons to water. withheld withheld 20081218 withheld Becky Jordan Fugro EarthData, Inc. Project Manager mailing and physical address

7320 Executive Way

Frederick MD 21704 301-948-8550 301-963-2064 bjordan@earthdata.com Monday through Friday, 8:30am to 5:00pm The following describes the 3D hydro breakline creation process. Step 1) Vertices of single line streams and banklines are assigned elevation values based on the surrounding bare-earth lidar points. After elevation values have been assigned to banklines, the vertices of stream connector lines are assigned values based on the nearest associated bankline vertex. Linework is inspected for any no data values or other anomalies from the underlying lidar surface. Step 2) If the sub-basin being processed has an upstream inflow from another sub-basin, the final elevations from the upstream sub-basin's outflow vertex is transferred to the inflow vertex of the current sub-basin. Step 3) A routine is run to modify the single line streams and stream connector lines that make up the stream network. All vertices in the network are adjusted so that subsequent vertices are lower than previous ones based on line direction. After the network vertices are adjusted, the bankline vertices are re-assigned based on the vertices of the closest adjusted stream connector. After elevation values are adjusted, linework is inspected for any extreme differences from the underlying lidar surface. Step 4) Sub-basin areas are merged and clipped to the deliverable basin boundary. Step 5) 3D hydro lines are imported by basin areas into the final geodatabase featureclass. withheld withheld withheld 20090123 withheld Becky Jordan Fugro EarthData, Inc. Project Manager mailing and physical address

7320 Executive Way

Frederick MD 21704 301-948-8550 301-963-2064 bjordan@earthdata.com Monday through Friday, 8:30am to 5:00pm The 3D hydrolines have been merged together across the entire 16 County area. The merged hydrolines are then clipped by the LiDAR boundary of each deliverable county. withheld withheld 20090301 withheld Andrew Peters Dewberry mailing and physical address

8401 Arlington Boulevard

Fairfax Virginia 22031 USA 703-849-0214 703-849-0182 apeters@dewberry.com Metadata imported. withheld 20090824 16333600 0 Vector String 8550 Simple Polyline FALSE 8550 TRUE FALSE coordinate pair 0.000328 0.000328 international feet Lambert Conformal Conic 32.500000 34.833333 -81.000000 31.833333 2000000.000000 0.000000 D_North_American_1983_HARN Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983_HARN NAD_1983_HARN_StatePlane_South_Carolina_FIPS_3900_Feet_Intl North American Vertical Datum of 1988 0.000100 Meters Explicit elevation coordinate included with horizontal coordinates 3D hydro breaklines contain values referencing spatial locations horizontal and vertical. Horizontal X and Y values are represented in South Carolina State Plane international feet, NAD83/2007. Vertical Z values are referenced in NAVD88, meters. The data set includes a single elevation value for each breakline vertex. Attribute fields include the following; object ID, shape, hydrographic feature, and shape length. 3D hydro breaklines delivered in an ESRI geodatabase with the following attribute fields; object ID, shape (Polyline Z), hydrographic feature (stream bank line, single line stream, stream connector, and waterbody bank line). Greenwood_Hydrolines Feature Class 8550 OBJECTID OBJECTID OID 4 0 0 Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. SHAPE SHAPE Geometry 0 0 0 Feature geometry. ESRI Coordinates defining the features. HYDRO_FTR Hydrographic Feature Integer 4 0 0 SHAPE_Length SHAPE_Length Double 8 0 0 Length of feature in internal units. ESRI Positive real numbers that are automatically generated. South Carolina Department of Natural Resources Mr. Jim D. Scurry mailing and physical address

1000 Assembly Street

Columbia South Carolina 29201 United States 803-734-9494 803-734-7001 scurryj@dnr.sc.gov Monday - Friday 8:30 AM - 5:00 PM http://www.dnr.sc.gov/gis Technology Development Program Director Downloadable Data None no cost Download from SCDNR GIS Clearinghouse 20090824 20090123 South Carolina Department of Natural Resources Mr. Jim D. Scurry mailing and physical address

1000 Assembly Street

Columbia South Carolina 29201 United States 803-734-9494 803-734-7001 scurryj@dnr.sc.gov Monday - Friday 8:30 AM - 5:00 PM http://www.dnr.sc.gov/gis Technology Development Program Director FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile en http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile 20090824 16333700 20240116 10464100 FALSE 20090824 16333700 1.0 20090824 ESRI ArcCatalog 9.3.1.3000 Greenwood_Hydrolines 1597287.872047 1737926.854331 939999.999672 772956.092848 1 66.59 211.32 -82.335292 -81.864364 34.413866 33.950706 1 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset 002 withheld Local Area Network File Geodatabase Feature Class NAD_1983_HARN_StatePlane_South_Carolina_FIPS_3900_Feet_Intl 8550