gov.noaa.nmfs.inport:50785
eng
UTF8
dataset
Elevation
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
Telephone: 843-740-1202
Email: coastal.info@noaa.gov
pointOfContact
2024-02-29T00:00:00
ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data
ISO 19115-2:2009(E)
2017 Lidar DEM: Town of York, ME
me2017_york_dem_m6367
2017
publication
NOAA/NMFS/EDM
50785
https://www.fisheries.noaa.gov/inport/item/50785
WWW:LINK-1.0-http--link
Full Metadata Record
View the complete metadata record on InPort for more information about this dataset.
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
Telephone: 843-740-1202
Email: coastal.info@noaa.gov
originator
https://coast.noaa.gov/dataviewer
WWW:LINK-1.0-http--link
Citation URL
Link to the Data Access Viewer (DAV) where elevation, imagery, and land cover data are available for custom download.
download
https://coast.noaa.gov/dataregistry
WWW:LINK-1.0-http--link
Citation URL
Link to the Digital Coast Data where many types of coastal data are available for download.
download
https://coast.noaa.gov/
WWW:LINK-1.0-http--link
Citation URL
Link to the NOAA Office for Coastal Management (OCM) homepage
download
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/6368/breaklines/
WWW:LINK-1.0-http--link
Citation URL
Link to the data set breaklines.
download
Extent: The project area covers 76 sq. miles of the Town of York, ME. Ground Conditions During Flight: The project was flown in May 2017 during leaf off conditions and when there was no snow on the ground. The project area required LiDAR to be collected on 8 points/sq. meter equivalent to 4 points/sq. meter single swath or better and processed to meet the bare earth vertical accuracy as described with LiDAR Base Specifications v1.2. Project deliverables include: raw point cloud by swath, classified point cloud, Bare-Earth Surface (Raster DEM) 0.5m resolution, breaklines used for hydro-flattening Raw point cloud data is delivered by individual swath. All other deliverables are delivered in a 1050m x 1050m tiling scheme.
In addition to these bare earth Digital Elevation Model (DEM) data, the lidar point data that these DEMs were created from and the breaklines, are also available. These data are available for custom download at the link provided in the URL section of this metadata record.
Provide a high resolution Raster Digital Elevation Model with 0.5 meter grid spacing and hydro-flattened breaklines. The purpose for developing the data sets for this project are for improving elevation data over the Town of York providing the greater community, such as recreation and science, with high resolution data, establishing baseline high-resolution topography Hydro Flattened breaklines are used to provide consistent elevations to a bare earth surface model. This allows the user to create ESRI Raster DEM, Triangular Irregular Networks and fbare earth Classified LiDAR LAS files.
Aeroptic, LLC, Primus Consultants, LLC , the Town of York, ME
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
Telephone: 843-740-1202
Email: coastal.info@noaa.gov
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
Telephone: 843-740-1202
Email: coastal.info@noaa.gov
custodian
notPlanned
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/6368/supplemental/me2017_york_m6368.kmz
This graphic displays the footprint for this lidar data set.
kmz
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
theme
Global Change Master Directory (GCMD) Science Keywords
17.0
North America>United States>Maine
place
Global Change Master Directory (GCMD)
DEM
Light Detection and Ranging
bare earth
bare ground
theme
2017
May
temporal
DEMs - partner (no harvest)
project
InPort
otherRestrictions
Cite As: OCM Partners, [Date of Access]: 2017 Lidar DEM: Town of York, ME [Data Date Range], https://www.fisheries.noaa.gov/inport/item/50785.
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 that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations.
otherRestrictions
Distribution Liability: The Town of York shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics, if available, are not legal documents and are not intended to be used as such. These data are not of survey quality and not intended to be used for survey purposes. The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. The related graphics are intended to aid the data user in acquiring relevant data; it is not appropriate to use the related graphics as data. The Town of York give no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data be directly acquired from an Town of York source and not indirectly through other sources, which may have changed the data in some way. Although these data have been processed successfully on computer systems at the Town of York, no warranty expressed or implied is made regarding the utility of the data on another system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. User 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.In no event shall the creators, custodians, or distributors of these data be liable for any damages arising out of its use, or from the inability of the customer to use these data for their intended. Any conclusions drawn from the analysis of this information are not the responsibility of Aeroptic, LLC, Primus Consultants, LLC , the town of York, ME, the NOAA Office for Coastal Management, or its partners.
unclassified
NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
50785
https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocmp/dmp/pdf/50785.pdf
WWW:LINK-1.0-http--link
NOAA Data Management Plan (DMP)
NOAA Data Management Plan for this record on InPort.
information
crossReference
eng; US
oceans
-70.772045
-70.565639
43.07034
43.268821
| Currentness: Ground Condition
2017-05-15
2017-05-16
Contractor: Aeroptic, LLC. All acquisition and calibration and Ground control was completed by the prime contractor. Post processing and generation of deliverables was provided by Primus Consultants, LLC.
false
eng
false
All deliverables meet specifications in contract.
GeoTIFF
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
Telephone: 843-740-1202
Email: coastal.info@noaa.gov
distributor
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6367
WWW:LINK-1.0-http--link
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6367
Link to custom download points, grids, or contours from the Data Access Viewer (DAV)
download
https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/ME_York_DEM_2017_6367/index.html
WWW:LINK-1.0-http--link
https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/ME_York_DEM_2017_6367/index.html
Link to bulk download tif files
download
dataset
Horizontal Positional Accuracy
No information provided.
Vertical Positional Accuracy
0.16 meters AccuracyZ at 95% Confidence Interval (8 cm RMSE)
The independent checkpoints were surveyed using GPS. Elevations from the unclassified LiDAR data surface and the classified LiDAR surface were measured for the x,y and z location for each check point. Elevations interpolated from the LiDAR surface were then compared to the elevation value of the surveyed control points. the RMSE was computed to be TBD meters. Accuracyz has been tested to meet =19.6 cm NVA at 95% confidence level using (RMSEz * 1.96000) as defined by the National Standards for Spatial Data Accuracy (NSSDA). A Survey Report of the check points and Absolute Accuracy Report is available from the owner.
Completeness Report
A visual qualitative assessment was performed to ensure data completeness. No void areas or missing data exist. The classified las data is of good quality and data passes the specifications for USGS QL1 data.
LIDAR Preprocessing: Leica Cloud Pro Point cloud Processor software was used in the post processing of the airborne GPS and inertial data that is critical to the positioning and orientation of the sensor during all flights. Leica Cloud Pro provides the smoothed best estimate of trajectory (SBET) that is necessary for Leica ALS post processor to develop the point cloud from the LiDAR missions. Calibration of the data is done using the Leica Cloud Pro software. The .las files are imported in, prepped, and spatially indexed. Ground control points/check points are imported and a QA/QC module is run. Relative calibration was evaluated using advanced plane-matching analysis and parameter corrections. Relative calibration was repeated iteratively until errors between overlapping swaths, across all project lifts, was reduced to ±16cm on planar surfaces within the area of interest. A flight line separation report is exported to a .jp2 file. Global Mapper is used to view the .jp2 file to determine if the data is within the client’s specifications. A control report was generated to assess the RMSE of check points and ensure compliance with QL1 specification. 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.
LIDAR Postprocessing: Subsequent to pre-processing, data were then distributed as virtual tiles to experienced LiDAR analysts for localized automatic classification, manual editing, and peer-based QC checks. Supervisory QC monitoring of work in progress and completed editing ensured consistency of classification character and adherence to project requirements across the entire project. The point cloud was manipulated within TerraScan and TerraModeler software was used for the automated data classification, manual cleanup, and bare earth generation from this data. Classification of the point cloud to contract specifications: 1-Unclassified, 2-Bare-earth ground, 3-Low Vegetation, 4-Medium Vegetation,5-High Vegetation, 7- Low Noise, 9-Water, 10-Ignored Ground due to breakline proximity, and 11-Withheld, 17-Bridge decks, 18-High Noise. Project specific macros were used to classify the ground, the three types of vegetation and to remove the side overlap between parallel flight lines. Client defined vegetation height ranges are 0-0.5 m (low), 0.51 – 1.5m (medium) and 1.51m and above (high). All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. After completion of classification and final QC approval, the NVA and VVA for the project are calculated. Sample areas for each land cover type present in the project was extracted and forwarded to the client, along with the results of the accuracy tests. Class 2 LiDAR was used to create a bare earth surface model. The surface model was then used to heads-up digitize 3D breaklines of inland streams and rivers with a 30 meter nominal width and inland ponds and lakes of 8,000 sq. meters or greater surface area. All data was processed in UTM NAD83 Zone 12, Meters. All ground (ASPRS Class 2) LiDAR data inside of the collected inland breaklines were then classified to water (ASPRS Class 9) using TerraScan macro functionality. A buffer of 0.7 meter was also used around each hydro flattened breakline feature. These points were moved from ground (ASPRS Class 2) to Ignored Ground (ASPRS Class 10).
Quality control by Aeroptic LLC completed independent QA/QC of the calibrated files, classified files and derivative products. QC module and other software was used validate the data sets for compliance with LiDAR Base Specifications v1.2. Outputs in included Data Check and Calibration Check Reports. Absolute Accuracy Reports for pre-and post-classified LiDAR date were also generated. All reports are on file with the owner.
Breakline:The LiDAR surface model was used to heads-up digitize 3D breaklines of inland streams and rivers with a 30 meter nominal width and Inland Ponds and Lakes of 8,000 sq. meters or greater surface area. all data was processed in UTM NAD83 Zone 19, Meters. All ground (ASPRS Class 2) LiDAR data inside of the collected inland breaklines were then classified to water (ASPRS Class 9)using TerraScan macro functionality. A buffer of 0.7 meter was also used around each hydro flattened feature. These points were moved from ground (ASPRS Class 2) to Ignored Ground (ASPRS Class 10). The breaklines were used to perform the hydrologic flattening of water bodies, and gradient hydrologic flattening of double line streams. Lakes, reservoirs and ponds, at a nominal minimum size of two (2) acres or greater, were compiled as closed polygons. The closed water bodies were collected at a constant elevation. Rivers and streams, at a nominal minimum width of 30.5 meters (100 feet), were compiled in the direction of flow with both sides of the stream maintaining an equal gradient elevation.
The NOAA Office for Coastal Management (OCM) received the point and raster DEM data from the Town of York, ME. The data were in UTM Zone 19 (NAD83) meters coordinates and NAVD88 (Geoid12a) elevations in meters. The rasters were at a 0.5 m grid spacing. OCM copied the raster files to database and https for Digital Coast storage and provisioning purposes.
2017-12-11T00:00:00
Office for Coastal Management
processor
In April 2019, after the data had been available for download from the Data Access Viewer for approximately one year, the NOAA Office for Coastal Management (OCM) determined that the elevation values in this data set were 1 to 1.5 m lower than valid elevations. After receiving the control point data from the Town of York, it appears that the point data were originally in WGS84 ellipsoid heights and GEOID12a was applied to convert to NAVD88. However, GEOID12a should be applied to NAD83 ellipsoid heights, not WGS84. Therefore, the files that were provided in NAVD88 had incorrect (too low) elevations.
Using VDatum 3.9 via a python script, the DEM tiles' heights were transformed from their incorrect NAVD88 vertical datum back to their original ellipsoid heights. They were then correctly transformed from the WGS84 ellipsoid to NAVD88 Geoid 12a.
2019-04-25T00:00:00
Office for Coastal Management
processor