ATM Coastal Topography--Florida 2001: Western Panhandleremote-sensing image2009U.S. Geological Survey Data Series431Saint Petersburg, FLU.S. Geological SurveyU.S. Geological SurveyfirstASCII xyz point cloud data were produced from remotely sensed, geographically referenced elevation measurements cooperatively by the U.S. Geological Survey (USGS) and National Aeronautics and Space Administration (NASA). Elevation measurements were collected over the area using the NASA Airborne Topographic Mapper (ATM), a scanning Lidar system that measures high-resolution topography of the land surface. The ATM system is deployed on a twin-otter or P3 aircraft and incorporates a green-wavelength laser operating at pulse rates of 2 to 10 kilohertz. Measurements from the laser ranging device are coupled with data acquired from inertial navigation system (INS) attitude sensors and differentially-corrected global positioning system (GPS) receivers to measure topography of the surface at accuracies of +/-15 centimeters.The ASCII elevation data can be used to create raster Digital Elevation Models (DEMs). The purpose of this project is to produce highly detailed and accurate elevation maps of the western Florida panhandle coastline for natural resource managers and research scientists.Raw Lidar data are not in a format that is generally usable by resource managers and scientists. Converting dense Lidar elevation data into a readily usable format without loss of essential information requires specialized processing. The U.S. Geological Survey's Coastal and Marine Geology (CMG) Program has developed custom software to convert raw Lidar data into a GIS-compatible map product to be provided to GIS specialists, managers, and scientists. The primary tool used in the conversion process is Advanced Lidar Processing System (ALPS), a multi-tiered processing system developed by a USGS-NASA collaborative project. These data are converted to the North American Datum of 1983 and the North American Vertical Datum of 1988 (using the GEOID03 model). The files are in the Quarter-Quad tiling format, and the exact tile location is contained in the file name at ########_fs, where ####### is the Quarter-Quad tile ID.
The development of custom software for creating these data products has been supported by the USGS CMG Program's Decision Support for Coastal Parks, Sanctuaries, and Preserves Project. Processed data products are used by the USGS CMG Program's National Assessments of Coastal Change Hazards Project to quantify the vulnerability of shorelines to coastal change hazards such as severe storms, sea-level rise, and shoreline erosion and retreat.en200110022001100320011004200110072001100820011009ground conditionNone planned475979.211507056469954.9043595383353440.175300833360380.98329732Airborne Lidar Processing SystemALPSDEMDigital Elevation ModelATMAirborne Topographic Mapperlaser altimetryLidarremote sensingtopographyhttp://remotesensing.usgs.govFloridaWestern Panhandlehttp://nationalmap.govNorthern Gulf of MexicoFirst Surfacehttp://lidar.cr.usgs.gov/2001http://www.esri.com/news/arcuser/1104/temporal.htmlNoneThe U.S. Geological Survey and National Aeronautics and Space Administration request to be acknowledged as originators of the dataset in future products or derivative research.Computer Scientistmailing and physical address600 4th Street SouthSaint PetersburgFL33701USA727-803-8747 (x3026)anayegandhi@usgs.govM-F, 8:00-5:00 ESTjbrock@usgs.govAmar NayegandhiJacobs Technology, U.S. Geological Survey, FISCAcknowledgment of the U.S. Geological Survey, Florida Integrated Science Center, as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices for data source is expected. Sharing of new data layers developed directly from these data would also be appreciated by the U.S. Geological Survey staff. Users should be aware that comparisons with other datasets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in photointerpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such.Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcMap 9.2.2.1350Point dataUnclassifiedUnclassifiedNoneThe expected accuracy of the measured variables is as follows: attitude within 0.07 degree, 3-cm nominal laser ranging accuracy, and vertical elevation accuracy of +/-15 cm for the topographic surface. Quality checks are built into the data-processing software.Raw elevation measurements have been determined to be within 1-meter horizontal accuracy.Elevations of the DEM are vertically consistent with the point elevation data, +/-15 cm.The data are collected using a twin-otter aircraft. The NASA Airborne Topographic Mapper (ATM) collects the data using a green raster scanning laser. The data are stored on hard drives and archived at the U.S. Geological Survey, FISC office in St. Petersburg, FL, and the NASA office at Wallops Flight Facility in Virginia. The navigational data are processed at Wallops Flight Facility. The navigational and raw data are then downloaded into the Advanced Lidar Processing System (ALPS). Data are converted from units of time to x,y,z points for elevation. The derived surface data can then be converted into raster data (GeoTIFFs).20011002-20081009mailing and physical address600 4th Street SouthSaint PetersburgFL33701USA727-803-8747 (x3026)M-F, 8:00-5:00 ESTanayegandhi@usgs.govComputer ScientistAmar NayegandhiJacobs Technology, U.S. Geological Survey, FISC, St. Petersburg, FLMetadata imported into ArcCatalog from XML file.mailing and physical address600 4th Street SouthSaint PetersburgFL33701USA727-803-8747Metadata SpecialistMetadata SpecialistU. S. Geological SurveyESRI ArcCatalog 9.2.2.135020081009Several regions of the dataset are labeled as "No Data". These "No Data" areas are a result of the survey not covering a particular region, optical water depth of greater than 1.5 Secchi disc depths, or the manual removal of Lidar processing artifacts.The files are in the Quarter-Quad tiling format, and the exact tile location is contained in the file name at ########_fs, where ####### is the Quarter-Quad tile ID.
See DOQQ_naming_convention.doc in the 'extras' directory.PointNorth American Datum of 1983Geodetic Reference System 806378137.000000298.257222GCS_North_American_1983NAD_1983_UTM_Zone_16coordinate pairNorth American Vertical Datum of 19880.15mmetersExplicit elevation coordinate included with horizontal coordinatesThe variables measured by the ATM are distance between aircraft and GPS satellites (m), attitude information (roll, pitch, heading in degrees), scan angle (degrees), second of the epoch (sec), and 1ns time-resolved return intensity waveform (digital counts). Z value is referenced to orthometric elevations derived from National Geodetic Survey Geoid Model, GEOID03.These are point elevation data obtained using the ATM.XYZ point data file format.Project Managermailing address600 4th Street SouthSaint PetersburgFL33701USA727-803-8747M-F, 8:00-5:00 ESTU.S. Geological SurveyProject ManagerDS 431This DVD publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herin to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.VaryContact U.S. Geological SurveyVaryASCIIXYZDVDDVDContact U.S. Geological Survey for details.2001100220081009mailing address600 4th Street SouthSaint PetersburgFL33701USA727-803-8747Metadata SpecialistMetadata SpecialistU.S. Geological SurveyM-F, 8:00-5:00 ESTFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998local timeenhttp://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile20090106123712002008082812524200FALSE2008043013465800{FCB905F1-C949-4BFF-BC6D-392FBC5A49A0}20090106Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.135030087c3b_fs_fs.xyz475979.211507056469954.9043595383360380.983297323353440.175300831-87.3125-87.2530.37530.31251ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset0.000Raster DatasetNAD_1983_UTM_Zone_16211732Meter1 Meter = 1 Meter(s)1062Meter1 Meter = 1 Meter(s)