gov.noaa.nmfs.inport:49789 eng UTF8 dataset OCM Partners resourceProvider NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact 2026-04-30T00:00:00 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) 2009 U.S. Geological Survey (USGS) Topographic LiDAR: Androscoggin County, Maine me2009_usgs_androscoggin_m2480_metadata 2013-04 publication NOAA/NMFS/EDM 49789 https://www.fisheries.noaa.gov/inport/item/49789 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://coast.noaa.gov WWW:LINK-1.0-http--link Citation URL Online Resource download https://coast.noaa.gov/dataviewer WWW:LINK-1.0-http--link Citation URL Online Resource download 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. Photo Science, Inc. flew the LiDAR and processed the data. completed NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information custodian asNeeded Lidar - partner (no harvest) project InPort otherRestrictions Cite As: OCM Partners, [Date of Access]: 2009 U.S. Geological Survey (USGS) Topographic LiDAR: Androscoggin County, Maine [Data Date Range], https://www.fisheries.noaa.gov/inport/item/49789. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: None otherRestrictions Use Constraints: 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. otherRestrictions Distribution Liability: 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. unclassified vector eng; US elevation -70.405713 -69.986657 43.90332 44.493105 | Currentness: Ground Condition 2009-11-17 2009-12-02 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 false eng false LAS files meet specifications in Project Report listed above in "Supplemental_Information" NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information distributor https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2480 WWW:LINK-1.0-http--link Customized Download Create custom data files by choosing data area, product type, map projection, file format, datum, etc. download https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2480/index.html WWW:LINK-1.0-http--link Bulk Download Simple download of data files. download dataset Accuracy 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. Vertical Positional Accuracy 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. Completeness Report Datasets contain complete coverage of tiles. Conceptual Consistency 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. 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 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