{
 "culture": "en-US",
 "name": "MARIN_2019_CHM_3FT",
 "guid": "",
 "catalogPath": "",
 "snippet": "This 3-foot resolution canopy height model (CHM) depicts Marin County\u2019s woody canopy as a Digital Elevation Model.  Pixel values of the countywide raster are.",
 "description": "<DIV STYLE=\"text-align:Left;\"><DIV><DIV><P STYLE=\"margin:0 0 14 0;\"><SPAN STYLE=\"font-weight:bold;font-size:12pt\">Methods:<\/SPAN><SPAN STYLE=\"font-size:12pt\"> <\/SPAN><SPAN /><SPAN><SPAN /><\/SPAN><\/P><P STYLE=\"margin:0 0 14 0;\"><SPAN><SPAN>This LiDAR derivative provides information about vegetation height.  The 3-foot resolution raster was produced from the winter, 2019 Quality Level 1 LiDAR point cloud (already ground classified) using Lastools in a multistep process.  The processing steps were as follows:<\/SPAN><\/SPAN><\/P><UL><LI><P><SPAN>Create Tiles (lastile)<\/SPAN><\/P><\/LI><LI><P><SPAN>Height Normalize the Point Cloud (lasheight)<\/SPAN><\/P><\/LI><LI><P><SPAN>Classify Buildings (lasclassify)<\/SPAN><\/P><\/LI><LI><P><SPAN>Clamp Building to 0 Ft. Normalized Height (las2las)<\/SPAN><\/P><\/LI><LI><P><SPAN>Thin the Point Cloud (lasthin)<\/SPAN><\/P><\/LI><LI><P><SPAN>Convert the Point Cloud to a DEM (las2dem) <\/SPAN><\/P><\/LI><\/UL><P STYLE=\"margin:0 0 14 0;\"><SPAN STYLE=\"font-weight:bold;font-size:12pt\">Uses and Limitations:<\/SPAN><SPAN /><\/P><P STYLE=\"margin:0 0 14 0;\"><SPAN>The canopy height model provides a raster depiction of the highest vegetation returns for each 3x3 foot raster cell across Marin County.  The layer is useful for myriad vegetation and forest-related analysis and is an important input to the automated processes used to develop the Marin County fine scale vegetation map.  However, this data product was produced based on a rapid, fully automated point cloud classification and was not manually edited. As such, it includes some \u2018false positives\u2019 \u2013 pixels with a canopy height in the raster that aren\u2019t vegetation.  These false positives include noise from water aboveground non-vegetation returns from bridge decks, powerlines, and edges of buildings.<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>",
 "summary": "This 3-foot resolution canopy height model (CHM) depicts Marin County\u2019s woody canopy as a Digital Elevation Model.  Pixel values of the countywide raster are.",
 "title": "MARIN_2019_CHM_3FT",
 "tags": [
  "Canopy Height Model",
  "LiDAR",
  "Marin"
 ],
 "type": "Image Service",
 "typeKeywords": [
  "Data",
  "Service",
  "Image Service",
  "ArcGIS Server"
 ],
 "thumbnail": "thumbnail/thumbnail.png",
 "url": "https://gis.marinpublic.com/arcgis/services/LIDAR/MARIN_2019_CHM_3FT/ImageServer",
 "minScale": 0,
 "maxScale": 0,
 "spatialReference": "",
 "accessInformation": "Golden Gate National Parks Conservancy, Tukman Geospatial LLC",
 "licenseInfo": ""
}