| snippet:
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This raster is a digital elevation model (ie DEM) layer that represents the bare earth surface of the Essex Region. |
| summary:
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This raster is a digital elevation model (ie DEM) layer that represents the bare earth surface of the Essex Region. |
| accessInformation:
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CGVD28:78 DEM surface derived by ERCA based on MNRF Lidar – Digital Terrain Model (2016-18). Copyright ERCA, 2019. Contains information licensed under the Open Government Licence – Ontario (www.ontario.ca/page/open-government-licence-ontario) |
| thumbnail:
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thumbnail/thumbnail.png |
| typeKeywords:
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["Data","Service","Image Service","ArcGIS Server"] |
| description:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Raster dataset representing the bare earth surface of the Essex Region.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>The Airborne Topographic Lidar (ATL) acquisition was initiated during the fall of 2016, spring/fall of 2017 and spring of 2018 through a collaborative partnership between the Ministry of Natural Resources and Forestry (MNRF), the Ministry of Agriculture, Food and Rural Affairs (OMAFRA) and a private contractor; it covers the entirety of, and is limited to, the Essex Region. The Lidar Digital Terrain Model is a 50 cm raster representing the bare-earth terrain derived from a classified lidar point cloud, which has been hydro-flattened using water body breaklines. </SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>This data set was produced to meet accuracy standards for Ontario Digital Geospatial Data for a 5 cm Vertical Accuracy Class equating to Non-vegetated Vertical Accuracy (NVA) of +/- 9.8 cm at 95% confidence level and Vegetated Vertical Accuracy (VVA) of +/- 14.7 cm at the 95th percentile. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>The original dataset's horizontal and vertical reference systems/datums are as follows:</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>Horizontal: NAD 83 CSRS epoch 2010 UTM Zone 17 N</SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>Vertical: CGVD2013</SPAN></SPAN></P><P STYLE="font-weight:bold;margin:0 0 0 0;"><SPAN /></P><P STYLE="font-weight:bold;margin:0 0 0 0;"><SPAN>The </SPAN><SPAN><SPAN>Essex Region Conservation Authority</SPAN></SPAN><SPAN><SPAN>has converted the vertical datum to CGVD28:78 using the GPS-H tool from NRCan. The methodology used for this conversion is available from ERCA upon request.</SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Source dataset metadata record (retrieved 20200304): </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /><A href="https://geohub.lio.gov.on.ca/datasets/mnrf::ontario-digital-terrain-model-lidar-derived"><SPAN><SPAN>https://geohub.lio.gov.on.ca/datasets/mnrf::ontario-digital-terrain-model-lidar-derived</SPAN></SPAN></A></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Source dataset user guide (retrieved 20200304):</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /><A href="https://www.sdc.gov.on.ca/sites/MNRF-PublicDocs/EN/CMID/Ontario-DTM-Lidar-Derived-User-Guide.docx"><SPAN><SPAN>https://www.sdc.gov.on.ca/sites/MNRF-PublicDocs/EN/CMID/Ontario-DTM-Lidar-Derived-User-Guide.docx</SPAN></SPAN></A></P><P><SPAN /></P><P><SPAN /></P></DIV></DIV></DIV> |
| licenseInfo:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>ERCA Standard Data Sharing Agreement applies. Not for unrestricted public use.</SPAN></P><P><SPAN /><SPAN>Copyright ERCA, 2019. Contains information licensed under the Open Government Licence – Ontario </SPAN></P><P><SPAN>(www.ontario.ca/page/open-government-licence-ontario)</SPAN></P></DIV></DIV></DIV> |
| catalogPath:
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| title:
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Lidar_DTM_2017_LIO_CGVD28_78 |
| type:
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Image Service |
| url:
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http://gisimagery.countyofessex.ca/arcgis/services/DEM/Lidar_DTM_2017_LIO_CGVD28_78/ImageServer |
| tags:
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["Lidar","DEM","DTM","Elevation"] |
| culture:
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en-US |
| name:
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Lidar_DTM_2017_LIO_CGVD28_78 |
| guid:
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| spatialReference:
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NAD_1983_CSRS_UTM_Zone_17N |