Name: Spot Elevations 50' spacing (2018)

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Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Points spaced 50 feet apart representing ground surface were derived from classified LiDAR flown by </SPAN><SPAN>Digital Aerial Surveys LLC between May 7, 2018 and March 1, 2019. The Lee County portion was flown May 8 to October 29, 2018.</SPAN></P><P><SPAN>Compressed LAS files (Albers meters) were downloaded from USGS' ftp site </SPAN><A href="ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/USGS_LPC_FL_Southwest_A_2018_LAS_2019"><SPAN><SPAN>ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/USGS_LPC_FL_Southwest_A_2018_LAS_2019</SPAN></SPAN></A><SPAN>. LAZ were decompressed using rapidlasso's LASzip. GeoCue's LP360 for ArcMap tools were utilized to extract point coordinates from the LAS surface using points classes Ground (2), Water (9) and Bridge Deck (17). The points generated from these coordinates were projected to Florida State Plane West, feet using ArcGIS' Project tool and the elevation converted from meters to feet (m * 3.28084). The X and Y coordinates in this dataset are in State Plane feet. Elevation is in feet NAVD 88 vertical datum.</SPAN></P><P><SPAN>The horizontal accuracy is +/-0.783 meters or +/-2.57 feet (at the 95% confidence level) and the vertical accuracy is +/-0.175 meters (+/-0.57 feet) for nonvegetated and +/-0.190 meters (+/- 0.62 feet) for vegetated areas. See the report, LiDAR Project Report 140G0218F0179, FL SOUTHWEST 2018 D18, prepared by Digital Aerial Solutions, LLC for United States Geological Survey, for full accuracy details.</SPAN></P><P><SPAN>Additional information can be found here: https://coast.noaa.gov/htdata/raster2/elevation/USGS_FL_Southwest_2018_9049/2018_swfl_m9049_met_forHumans.html, and on Lee County's network </SPAN><SPAN>M:/GISLAYERS/2018LiDAR/Metdata/18012_FL_SW_2018_D18_Report.pdf</SPAN></P><P /><P><SPAN /></P></DIV></DIV></DIV>

Copyright Text: U.S. Geological Survey

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