2004 FEMA Lidar: Blackstone (MA & RI)

The LIDAR-derived data was collected in the Blackstone River area. This data supports the Federal Emergency Management Agency's specifications for mapping floodplains. These efforts required detailed elevation data and models, such as those available from LIDAR sensing. The data have also been made available to aid in other projects that require detailed surface, vegetation and/or structure elevations. Buildings classed as ground.

The purpose of this LiDAR data was to produce high accuracy 3D elevation based geospatial products for coastal flood mapping. The following regions of Rhode Island are included in this project

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

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/5045/supplemental/mari2004_fema_blackstone_be_m5045.kmz

LiDAR point data in LAS 1.2 format

ASPRS classification scheme (2 = ground)

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

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

https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=5045;

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be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.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

Horizontal accuracy was not reported, therefore assuming 100 cm accuracy

RTK collected in coincidence; Quantitative Value: 0.185 meters, Test that produced the value: Reported as Quality level 4, with an point spacing of 1.3 m, therefore inference was that vertical accuracy would need to meet 18.5 cm

Complete

All LiDAR files delivered were verified and tested to ensure they open and are positioned properly.