2015 NOAA NGS Topobathy Lidar: Buzzards Bay Block3 (MA)

These data were collected by the National Oceanic Atmospheric Administration National Geodetic Survey Remote Sensing Division using a Riegl VQ880G system. The data were acquired from 20151109 - 20151123. The data includes topobathy data in an LAS 1.2 format file classified as unclassified (1), ground (2), noise (7), water column (25), bathymetric point (26), topobathy water surface (27), submerged object (29), and International Hydrographic Organization (IHO) S-57 object (30) in accordance with the American Society for Photogrammetry and Remote Sensing (ASPRS) classification standards. This data set may also include lidar intensity values and encoded RGB image values.

Original contact information:

Contact Org: National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division

Phone: 301-713-2663

This lidar data are an ancillary product of NOAA's Coastal Mapping Program (CMP), created through a wider Integrated Ocean and Coastal Mapping initiative to increase support for multiple uses of the data. It is not intended for mapping, charting, or navigation. In addition, it will be used for ongoing research efforts for testing and developing standards for airborne lidar.

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Data include all lidar returns. Outliers or false returns (e.g., returns from birds, atmospheric particles, and/or system noise) may be present in the data. An automated ground classification algorithm was used to determine bare earth point classification. It should be noted that not all returns were correctly classified; therefore the user should examine for acceptability.

A footprint of this data is available here:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/5101/supplemental/ma2015_ngs_buzzards_bay_m5101.kmz

LAS 1.2

Classes 1,2,7,27

Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the National Geodetic Survey, the Office for Coastal Management, or its partners.

This data can be obtained on-line at the following

https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=5101;

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be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.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.

OS Independent

The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than plus or minus 1.0 m.; Quantitative Value: 1.0 meters, Test that produced the value: 2 sigma. Calculated to 0.5 RMSE (2 sigma 1.0 / 1.96 = RMSE)

The data positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than plus or minus 0.15 m.; Quantitative Value: 0.08 meters, Test that produced the value: 2 sigma. Calculated to 0.04 RMSE (2 sigma 0.08 / 1.96 = RMSE)

Original data extents include 2,104 tiles (500m x 500m tiles). 2,096 tiles were kept for distribution through the Digital Coast as they only included classes which were removed (noise classes).

Not applicable