49789 me2009_usgs_androscoggin_m2480_metadata Data Set Published / External 49401 Lidar - partner (no harvest) Project Completed 2013-04 USGS Contract Number: G10PC00026 USGS Task Order: G10PD01737 LiDAR was collected at a 1.0 points per square meter (1.0m GSD) for the county of Androscoggin, Maine while no snow was on the ground and rivers were at or below normal levels and prior to leaf-on conditions. One meter point spacing LiDAR data collection provides the information to create Intensity Images, Break Lines, Raster DEMs, and fully Classified LiDAR LAS files. 10433 A footprint of this data set may be viewed in Google Earth at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2480/supplemental/me2009_usgs_androscoggin_footprint.KMZ A project report of this data set may be viewed at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2480/supplemental/me2009_usgs_androscoggin_projectreport.doc Theme ISO 19115 Topic Category elevation Office for Coastal Management Charleston SC Data Set As Needed las LAS V1.1 LAS files meet specifications in Project Report listed above in "Supplemental_Information" Any conclusions drawn from the analysis of this information are not the responsibility of USGS, FEMA, STARR, Photo Science, NOAA, the Office for Coastal Management or its partners. Photo Science, Inc. flew the LiDAR and processed the data. Data Steward 2013-04 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2013-04 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Metadata Contact 2013-04 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Point of Contact 2013-04 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Ground Condition -70.405713 -69.986657 44.493105 43.90332 Range 2009-11-17 2009-12-02 Yes Unclassified This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2480 ; None Users should be aware that temporal changes may have occurred since this data set was collected and 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. These data depict the heights at the time of the survey and are only accurate for that time. https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2480 Customized Download Create custom data files by choosing data area, product type, map projection, file format, datum, etc. https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2480/index.html Bulk Download Simple download of data files. https://coast.noaa.gov Online Resource https://coast.noaa.gov/dataviewer Online Resource 2016-05-23 Date that the source FGDC record was last modified. 2017-11-14 Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. 2018-02-08 Partial upload of Positional Accuracy fields only. 2018-03-13 Partial upload to move data access links to Distribution Info. The project area requires LiDAR to be collected on average of 1 meter point spacing or better and vertical accuracy of 18.0 centimeters RMSE or better to support 2' contour generation when combined with breaklines. Deliverables were tested by Photo Science for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas. The vertical unit of the data file is in meters. ; Quantitative Value: 0.10 meters, Test that produced the value: RMSEz in meters. Datasets contain complete coverage of tiles. Deliverables were tested by Photo Science for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas. 1 Leica software was used in the post processing of the airborne GPS and inertial data that is critical to the positioning of the sensor during all flights. This software suite includes Applanix's PosPac and Waypoint's GrafNav solutions. PosPac provides the smoothed best estimate of trajectory (SBET) that is necessary for Leica's post processor to develop the point cloud from the LiDAR missions. The point cloud is the mathematical three dimensional collection of all returns from all laser pulses as determined from the aerial mission. At this point this data is ready for analysis, classification, and filtering to generate a bare earth surface model in which the above ground features are removed from the data set. The point cloud was manipulated within the Leica software; GeoCue, TerraScan, and TerraModeler software was used for the automated data classification, manual cleanup, and bare earth generation from this data. Project specific macros were used to classify the ground and to remove the side overlap between parallel flight lines. All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. Buffered LAS files were created in GeoCue to provide overedge to the DEM creation. These tiles were then run through automated scripting within ArcMap and were combined with the Hydro Flattened Breaklines to create the 2.5 foot DEM. Final DEM tiles were clipped to the tile boundary to provide a seamless dataset. ERDAS IMG files were then created as the project deliverable. A manual QA review of the tiles was completed in ArcMap and Global Mapper to ensure full coverage with no gaps or slivers within the project area. 2010-01-01T00:00:00 2 The NOAA Office for Coastal Management (OCM) received topographic files in the compressed LAS.GZ format. The files contained lidar elevation and intensity measurements. The data were received in Projected Coordinates (Maine State Plane West 1802) and were vertically referenced to NAVD88 using the Geoid03 model. The vertical units of the data were feet. OCM performed the following processing for data storage and Digital Coast provisioning purposes: 1. The topographic LAS files were uncompressed using gunzip. 2. The topographic LAS files were converted from Projected coordinates (Maine State Plane West) to Geographic Coordinates (NAD83). 3. The horizontal units of the topographic LAS files were converted from feet to decimal degrees. 4. The topographic LAS files were converted from orthometric (NAVD88) heights to ellipsoidal heights (NAD83) using Geoid03. 5. The vertical units of the topographic LAS files were converted from feet to meters. 2013-04-01T00:00:00 gov.noaa.nmfs.inport:49789 Anne Ball 2017-11-15T15:22:18 SysAdmin InPortAdmin 2022-08-09T17:11:36 2022-03-16 OCM Partners OCMP 1002 Public No No 2022-03-16 1 Year 2023-03-16