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This re-projected 2017 LiDAR DEM shows the elevation value in meters. 2017 DEM was reprojected to WGS84 Web Mercator (Auxiliary Sphere) for horizonal... |
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This re-projected 2017 LiDAR DEM shows the elevation value in meters. 2017 DEM was reprojected to WGS84 Web Mercator (Auxiliary Sphere) for horizonal... |
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Geospatial Services Division, Hillsborough County.
601 E. Kennedy Blvd., Tampa, FL 33602
Data sources: 2017 Digital Elevation Model (DEM) (unit feet): Southwest Florida Water Management District, 2379 Broad Street, Brooksville, Florida 34604-6899. |
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thumbnail/thumbnail.png |
| typeKeywords:
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["Data","Service","Image Service","ArcGIS Server","Elevation 3D Layer"] |
| description:
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<DIV STYLE="text-align:Left;"><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>This re-projected 2017 LiDAR DEM shows the elevation value in meters. 2017 DEM was reprojected to WGS84 Web Mercator (Auxiliary Sphere) for horizonal coordinate system from NAD 1983(2011), State Plane Florida West. This conversion used the Esri transformation WGS_1984_(ITRF08)_To_NAD_1983_2011 and a bilinear interpolation for resampling. Horizonal units is in meter.The Vertical datum is North American Vertical Datum of 1988 (NAVD88), Units in meter which was converted from U.S. Survey Feet by multiplying 0.3048. This converted DEM (unit meter) is for 3D webscene application purposes, and do not use for modelling purposes. </SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>The DEMs model the bare-earth surface and are enforced with the 3D breaklines created for this project. All tiled DEMs were mosaicked by SWFWMD to cover Hillsborough County.Dewberry collected 1200 square miles of lidar data from January 31, 2017 through March 04, 2017 in Hillsborough County, Florida. The nominal pulse spacing for this project was 1 point every 0.25 meters or a nominal pulse density of 16 points per square meter. Dewberrry used proprietary procedures to classify the LAS according to project specifications: 1-Unclassified, 2-Ground, 6-Building Rooftops, 7-Low Noise, 9-Water, 17- Bridge Decks, 18-High Noise. Geometrically unreliable points, ground points within 2 feet of breaklines, and ground points within 3 feet of building rooftops have been identified with the Withheld Flag. Overage points have been identified with the Overlap Flag. The lidar data were combined with 3D breaklines compiled by Dewberry to create hydro-enforced bare-earth DEMs. The data were tiled according to the Florida Statewide Lidar Index tiling scheme with each tile covering an area of 5,000 feet by 5,000 ft. </SPAN></P></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Hillsborough County makes no warranty, representation or guarantee as to the content, sequence, accuracy, timeliness, or completeness of any of the information provided herein. The reader should not rely on the data provided herein for any reason. Hillsborough County explicitly disclaims any representations and warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose. Hillsborough County shall assume no liability for: 1. Any errors, omissions, or inaccuracies in the information provided regardless of how caused; or 2. Any decision made or action taken or not taken by any person in reliance upon any information or data furnished hereunder. This dataset is provided by Hillsborough County for informational purposes and Hillsborough County does not guarantee the accuracy or content of the data. Hillsborough County is not liable for any deficiencies in the dataset or analyses/applications using the dataset. This data should not be construed as legal advice or legal opinion on any specific facts or circumstances. The contents are intended for general information purposes only, and you are urged to consult your own lawyer concerning your own situation and any specific questions you may have. Infrastructure records, drawings, and other documents have been gathered over many decades, using differing standards for quality control, documentation and verification. All of the data provided represents current information in a readily available format. While the data is generally believed to be accurate, occasionally it proves to be incorrect; thus its accuracy is not warranted. Prior to making any property purchases or investments, or taking any other action based in full or in part upon the material provided, it is specifically advised that you independently field verify the information contained in county records.</SPAN></SPAN></P><P /><P><SPAN /></P></DIV></DIV></DIV> |
| catalogPath:
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| title:
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n767demmosaic_WGS84_m |
| type:
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Image Service |
| url:
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https://maps.hillsboroughcounty.org/arcgis/services/InitialInstall/n767demmosaic_WGS84_m/ImageServer |
| tags:
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["DEM in meter"] |
| culture:
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en-US |
| name:
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n767demmosaic_WGS84_m |
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| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere |