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snippet:
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Spot elevations representing ground surface derived from LiDAR flown in 2018 |
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summary:
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Spot elevations representing ground surface derived from LiDAR flown in 2018 |
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accessInformation:
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U.S. Geological Survey |
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5000 |
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typeKeywords:
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[] |
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description:
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<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" STYLE="text-decoration:underline;"><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> |
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licenseInfo:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Lee County GIS Department has provided these GIS data sets as a public information resource. Every reasonable effort has been made to assure the accuracy of the data and other information contained. However, these data, maps, and other information are only as accurate as the source of such data, maps, and other information. Further, the data, maps, and other information on this layer are updated only periodically and therefore may not reflect the most current information.</SPAN></P><P><SPAN>The Lee County GIS Department makes no warranty, representation, or guarantee of any kind regarding either any data or other information provided herein or the sources of such data, maps, or other information. The Lee County GIS Department specifically disclaims all representations or warranties, express or implied, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose.</SPAN></P><P><SPAN>The Lee County GIS Department assumes no liability either for any errors, omissions, or inaccuracies in the information provided regardless of the cause of such or for any decision made, action taken, or action not taken by the user in reliance upon any data, maps, or information provided herein.</SPAN></P></DIV></DIV></DIV> |
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catalogPath:
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title:
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Spot Elevations 2018 (50 ft) |
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type:
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url:
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tags:
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["elevation","vertical","spot","DEM","Elevation Model","LiDAR","ground surface"] |
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culture:
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en-US |
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minScale:
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500000 |
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