AeroMetric, Inc. 20110912 remote-sensing image Sheboygan, WI AeroMetric This task order is for planning, acquisition, processing, and derivative products of LiDAR data to be collected for a portion of Willacy County, Texas. LiDAR data, and derivative products produced in compliance with this task order are part of the data to be obtained under the American Recovery and Reinvestment Act (ARRA) of 2009. Contract number G10PC00025. Specifications listed below are based on the U.S. Geological Survey National Geospatial Program Base LiDAR Specification, Version 13. USGS has a requirement for LiDAR data over a portion of Willacy County in Texas, covering approximately 501 square miles. Willacy County is to be collected at a nominal pulse spacing (NPS) of 2.0 meters. The Willacy County Texas LiDAR Acquisition project is to provide high accuracy bare-earth processed LiDAR data suitable for the project area. The project consisted of acquisition, post-processing, classification of LiDAR data, and creation of final deliverable products. All areas shall be collected at a nominal pulse spacing (NPS) of 2.0 meters based on UTM14, related to the North American Datum of 1983 (NSRS2007). Vertical accuracy was to achieve a RMSE Z of 12.5 cm (95% confidence level of less than 24.5 cm) or better in the "Open Terrain" land cover category for all areas. Accuracy statement is based on areas of moderate to flat terrain. Diminished accuracies are to be expected in areas in dense vegetation. The accuracy of the LiDAR data as tested met or exceeded the vertical accuracy requirements, however, derived products may be less accurate in areas of dense vegetation due to a lesser number of points defining the bare-earth in such areas. 20110201 ground condition Complete unknown 000.00000000 000.00000000 00.00000000 00.00000000 000000.000000 000000.000000 000000.000000 000000.000000 None Willacy County Light Detection and Ranging LiDAR LAS Point Cloud None US State TX None. None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from these data. Patrick EmmettUSGSNGTOC573-308-3587unknown573-308-3810pemmett@usgs.govunknownnonemailing and physical address

1400 Independence Road

RollaMO65401USA AeroMetric, Inc. 1. Scanner - Optech ALTM 3100 EA Serial 03SEN145 2. Processing Programs and versions - Applanix - POSGPS and POSProc, versions 4.4, MMS version 5.2 3. Program and version - Optech ASDA 4. Processing Programs and versions - TerraSolid TerraScan (version 011.005), TerraModeler (version 011.001) and TerraMatch (version 011.003), Intergraph MicroStation (version 08.05.02.55), and GeoCue (7.0.34.5). 5. Viewing Program - GlobalMapper V12.00 The Fundamental Vertical Accuracy (FVA) of the Classified Bare Earth files for the project area achieved an RMSE of 0.088 meters. Forty-five (45) 'open terrain' survey control points were used in this evaluation, with an additional 20 'open terrain' points held in reserve and supplied to the client. Additional survey control points were also supplied to the client with 20 points in the category of 'short grass' and 18 points in the category of 'tall grass'. None Complete All Area data products were acquired at or below 2500 meters above mean terrain (AMT) and have a horizontal accuracy of 0.45 meters (per manufacturers system specifications), with a nominal point spacing of 1.5 meters. The Fundamental Vertical Accuracy (FVA) of the Classified Bare Earth for all Areas achieved is 0.172 meters at a 95% confidence level in the "Open Terrain" land cover category. Forty-five (45) survey control points were used in this evaluation. The LiDAR data was captured using AeroMetric's twin-engine Cessna 310, fixed wing aircraft equipped with a LiDAR system. The LiDAR system includes a differential GPS unit and inertial measurement system to provide superior positional accuracy. Acquisition parameters: 1. Flight Height - 2500 meters above mean terrain 2. Swath Width - 34 degrees 3. Sidelap - 30% 4. Nominal Post Spacing - 1.5 meters GPS and IMU processing parameters: 1. Maximum baseline length - Not greater than 40 kilometers. 2. Number of base stations during LiDAR collection - A minimum of 1. 3. Maximum positional RMS of trajectory during LiDAR collection - 0.05 meters 4. IMU processing monitored for consistency and smoothness - Yes. Point Cloud Processing: 1. Horizontal Datum - NAD83(NSRS2007) 2. Horizontal Coordinates - Universal Transverse Mercator, Zone 14, in meters. 3. Vertical Datum - NAVD88 4. Geoid Model used to reduce satellite derived elevations to orthometric heights - NGS Geoid09. LiDAR Processing: 1. Point Cloud data is imported via TerraScan in a Microstation V8 (V) CAD environment on a specified 1500 meter by 1500 meter tiling scheme. 2. Analyze the data for overall completeness and consistency. This is to ensure that there are no voids or anomolies in the data collection. 3. Inspect for calibration errors in the dataset using the TerraMatch software. This is accomplished by sampling the data collected across all flight lines and classify the individual lines to ground. The software will use the ground-classified points by flightline to compute corrections (Heading, Pitch, Roll, and Scale). 4. Orientation corrections (i.e. Calibration corrections) are applied (if needed) to the entire dataset. 5. Automatic ground classification is performed using algorithms with customized parameters to best fit the project area. Several areas of varying relief and planimetric features were inspected to verify the final ground surface. 6. AeroMetric, Inc. provided Quality Assurance and Quality Control (QA/QC) data for this project. AeroMetric captured QA/QC points in 'open terrain' land cover category that were used to test the accuracy of the LiDAR ground surface. TerraScan's Output Control Report (OCR) was used to compare the QA/QC data to the LiDAR data. This routine searches the LiDAR dataset by X and Y coordinate, finds the closest LiDAR point and compares the vertical (Z) values to the known data collected in the field. Based on the QA/QC data, a bias adjustment was determined, and the results were applied (if necessary) to the LiDAR data. A final OCR was performed with a resulting RMSE of 0.088 meters for the project. 7. Each tile is reviewed for accuracy and consistency of the macro ground classification. 8. Once the automatic processing and the testing of LiDAR is complete, AeroMetric meticulously reviews the generated bare-earth surface data to ensure that proper classification was achieved as part of a Quality Control process. 9. Final deliverables are generated and output to a client specified 1500 meters by 1500 meters tiling scheme. 20110909 Unknown Point Universal Transverse Mercator 14 0.9996 -90 0 500000 0 coordinate pair 0.01 0.01 meters North American Datum of 1983 (NSRS 2007) Geodetic Reference System 80 6378137.000000 298.25722210088 North American Vertical Datum of 1988 0.01 meters Explicit elevation coordinate included with horizontal coordinates NAD_1983_UTM_Zone_14N The data are being provided on an 'as is' basis. The USGS specifically disclaims any warranty, expressed or implied, including, but not limited to, the implied warranties or merchantability and fitness for a particular use. The entire risk as to quality and performance is with the user. In no event will the USGS or its staff be liable for any direct, indirect, incidental, special, consequential, or other damages, including loss of profit, arising out of the use of these data even if the USGS has been advised of the possibility of such damages. All data are intended for resource management use. Translation of files to formats other than those described here is the sole responsibility of individuals downloading the data. Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made by the USGS regarding the use of the data on any other system, nor does the act of distribution constitute any such warranty. Data may have been compiled from various outside sources. Spatial information may not meet National Map Accuracy Standards. This information may be updated without notification. The USGS shall not be liable for any activity involving these data, installation, fitness of the data for a particular purpose, its use, or analyses results. None Varies ASCII or LAS None. Downloadable data only. None U.S. Geological Survey EROS Customer Services Mailing and physical address

Customer Services

U.S. Geological Survey

EROS Data Center

47914 252nd Street

Sioux Falls SD 57198-0001 US 1-800-252-4547 1-605-594-6933 1-605-594-6589 custserv@usgs.gov Monday through Friday 8:00 AM to 4:00 PM (Central Time) The above is the contact information for EROS Data Center in Sioux Falls, SD. this is the digital data storage and distribution center for the USGS. For best service, identify your question as related to "CLICK Lidar Data". 20110912 U.S. Geological Survey Mailing and physical address

Customer Services

U.S. Geological Survey

EROS Data Center

47914 252nd Street

Sioux Falls SD 57198-0001 US 1-800-252-4547 1-605-594-6933 1-605-594-6589 custserv@usgs.gov Monday through Friday 8:00 AM to 4:00 PM (Central Time) The above is the contact information for EROS Data Center in Sioux Falls, SD. this is the digital data storage and distribution center for the USGS. To improve service, identify your question as related to "CLICK Lidar Data". AeroMetric, Inc. Mailing and physical address

4020 Technology Parkway

Sheboygan WI 53083-6049 US 1-920-457-3631 1-920-457-0410 rmerry@aerometric.com Monday through Friday 8:00 AM to 5:00 PM (Central Time) FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998