Unpublished Material Abram's Creek Watershed: LiDAR Ground Points July 2006 1st vector digital data Canaan Valley InstituteJoshua Rutkowski, compiler Canaan Valley Institute (CVI) captured LiDAR elevation data for the Abram's Creek watershed in Grant and Mineral Counties, West Virginia The watershed is approximately 30, 265 acres. The average flying altitude above ground level is 300 meters. The pulse rate frequency is 100 kHz per second. The scan frequency is 50Hz. The scan angle is +/- 20 degrees. CVI collected and processed LiDAR data to aide in ongoing studies in the Abram's creek watershed. Canaan Valley Institute is actively acquiring LiDAR terrain data and digital color orthophotography using the Optech ALTM 3100, which can fire up to 100,000 laser pulses per second, with an integrated 3-band digital camera. The positional accuracy of these laser returns are within 15 centimeters in the vertical axis, with at least one laser shot placed every square meter and providing up to four vertical returns. The sensors are mounted in a Piper Navajo twin engine aircraft that is housed at the Fairmont Municipal Airport. LiDAR combines three different technologies to produce laser terrain mapping: GPS, Inertial Measurement Unit (IMU) compensation, and laser ranging. The laser data is then processed with the GPS and IMU data to produce highly accurate and precise terrain mapping that can be used for environmental, municipal, engineering, and planning applications. 17 July 2006 Date and time of aquisition Complete None planned -79.251402 -79.103649 39.407103 39.183948 none LiDAR Light Detection and Ranging West Virginia Grant County Mineral County none None These data sets were created with the highest consideration of accuracy and data integrity. However, as with all other geospatial data sets, users must take into consideration the consequences of using the data for specific applications, business processes, decisions, and map display. For example, surface conditions may have changed in some areas since the initial data was captured. A metadata record is provided to help the user understand the date, map scale and accuracy standard applied in the collection and data development process. The data should not be used without full review and comprehension of the metadata. Data further derived from this data set should be fully documented using the federal metadata standard. There is no guarantee of warranty concerning the accuracy of the data. 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. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. Josh Beck Canaan Valley Institute LiDAR Program 304-293-5320 304-293-5340 josh.beck@canaanvi.org Canaan Valley Institute None Unclassified N/A Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780 N/A N/A Once acquired, the datasets were uploaded to our server for processing. The following sofware packages were used in the processing steps: Applanix POSPac 4.3 Optech REALM Survey Suite 3.5 TerraSolid's Terramatch version 006.004 and Terrascan version 006.006 Microstation 08.05.02.35 Windows x86 No accuracy report or study has been conducted at the time of this releaseNo accuracy report or study has been conducted at the time of this releaseNo accuracy report or study has been conducted at the time of this release Vector G-polygon 81 Universal Transverse Mercator 17 0.999600 -81.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000064 0.000064 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 UTM Zone 17 Explicit elevation coordinate included with horizontal coordinates GRS 80Meters CVI makes no warranty, express or implied, of any nature or effect as to the data and related graphics contained herein. CVI shall not be held liable for improper or incorrect use of the data and graphics contained herein by a buyer, donee or other person relying upon the same. It is the responsibility of the person using or relying upon these data and graphics to do so appropriately and consistently within the limitations of geospatial data in general and these data in particular. Each user of these data and graphics are instructed to give careful attention to the contents of all metadata documentation associated with these data. CVI will not be liable for any direct, indirect, special, general, incidental or consequential damages arising out of the use or inability to use the data, related graphics, or any accompanying documentation. 0.007 20061016 LiDAR Manager mailing and physical address
240 Scott Ave. Suite 4
Morgantown WV 26508 USA 304-291-5320 800-922-3601 304-291-5340 M-F 9-5 Please ask for the LiDAR Manager when calling. Josh BeckCanaan Valley Institute FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile 200611271332010020061127