2012 Southwest Florida Water Management District (SWFWMD) Lidar: Lake Manatee

Geographic Information System (GIS). Southwest Florida Water Management District (SWFWMD) regularly uses digital topographic information to support regulatory, land management and acquisition, planning, engineering and habitat restoration projects. LiDAR data will support hydrologic modeling activities associated with the Federal Emergency Management Agency (FEMA), and in the creation of Digital Flood Insurance Rate Maps (DFIRM).

LiDAR data will support the creation of Federal Emergency Management Agency Flood Insurance Rate Maps (FEMA FIRM) and integrated ground and surface water model for the Lake Manatee Watershed.

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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/geoid18/3677/supplemental/fl2012_swfwmd_lakemanatee_m3677.kmz

A report for this dataset is available at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/3677/supplemental/fl2012_swfwmd_lakemanatee_m3677_surveyreport.pdf

LiDAR points in LAZ format (Classes 1,2)

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Any conclusions drawn from the analysis of this information are not the responsibility of SWFWMD,Earth Eye LLC, 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=3677;

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be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.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

According to NMAS standards; the following aspects of the data were verified during the course of the project processing:

- Data completeness and integrity

- Data accuracy and errors

- Anomaly checks through visual measurement and inspection

- Final quality control of deliverable products; ensuring integrity; graphical quality; conformance to SWFWMD standards are met for all delivered products.

+- 3.8 Foot (see Survey Report); Quantitative Value: 1.158 meters, Test that produced the value: 115.8 cm, 2 sigma

The fundamental Vertical Accuracy (FVA) of the LiDAR bare-earth was tested and meets a 0.60' fundamental accuracy at 95% confidence level using RMSEz x 1.9600 (whereas RMSEz = 0.30') as defined by the National Standard for Spatial Data Accuracy (NSSDA) in open well defined terrain. Then vertical accuracy testing for LiDAR data over well-defined surfaces will meet or exceed requirements as set forth in the Federal Geographic Data Committee's (FGDC) Geospatial Positioning Accuracy Standards, Part 3: National Standard for Spatial Data Accuracy (NSSDA).; Quantitative Value: 0.091 meters, Test that produced the value: 9.1 cm RMSEz

On a project level, a check of all tiles and tile seams were contiguous.

All files delivered were verified visually and tested by comparison to elevation in LiDAR ground points and survey data provided by SWFWMD to ensure they open and are positioned properly.