2011 NOAA National Geodetic Survey (NGS) Lidar: Great Bay and Portsmouth Harbor, New Hampshire

These data were collected by the National Oceanic Atmospheric Administration National Geodetic Survey Remote Sensing Division using a Riegl

Q680i-D system. The data includes topographic data in an LAS 1.2 format file classified as unclassified (1), ground (2), and water (9) in accordance

with the American Society for Photogrammetry and Remote Sensing (ASPRS) classification standards. This data set also includes 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

Title: Chief, Remote Sensing Division

Phone: 301-713-2663

This lidar was acquired by the NOAA Remote Sensing Division to support NOAA's Coastal Mapping Program. 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

water returns were correctly classified; therefore the ground classification could proceed into water bodies, and should be removed by the user.

A footprint of this data set may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1198/supplemental/2011_NGS_Lidar_Great_Bay_and_Portsmouth_Harbor_NH.kmz

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

This lidar was obtained for use by NGS during the course of its development of potential final products to fulfill its statutory mission.

Although NGS is making this lidar available to others who may find the data of value, NGS does not warrant, endorse, or recommend the use

of this data for any given purpose. NGS is providing this lidar as is, and NGS disclaims any and all warranties, whether expressed or

implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. In no event will

NGS be liable to you or any third party for any direct, indirect, incidental, consequential, special, or exemplary damages, or lost profits

resulting from any use or misuse of these data.

This data can be obtained on-line at the following URL:

https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1198

This data set is dynamically generated based on user-specified parameters.

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These data depict the heights at the time of the survey and are only accurate for that time. 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. Any conclusions drawn from analysis of this

information are not the responsibility of NOAA. We request that you credit the National Oceanic and Atmospheric Administration (NOAA)

when you use these data in a report, publication, or presentation.

OS Independent

The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than +/- 1.0 m.; Quantitative Value: 1.0 meters, Test that produced the value: 2 Sigma

The data positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than +/- 0.30 m.; Quantitative Value: 0.30 meters, Test that produced the value: 2 Sigma

Not applicable

Not applicable