This is a Non-Federal dataset covered by different Terms of Use than

DSM - Township 46N Range 11E

Metadata Updated: June 14, 2019

The Digital Surface Model (DSM) is a 3-foot pixel resolution raster in GeoTIFF format. This was created using all points (excluding NOISE) from our 2007 LiDAR data without incorporating the breaklines. Merrick and Co. MARS (ver. 8.0.4, build 8185) software was used to create the GeoTIFF images.The DSMs were developed using LiDAR data. LiDAR is an acronym for LIght Detection And Ranging. Light detection and ranging is the science of using a laser to measure distances to specific points. A specially equipped airplane with positioning tools and LiDAR technology was used to measure the distance to the surface of the earth. The classified points were developed using data collected in April to May 2007. The LiDAR points, specialized software, and technology provide the ability to create a high precision three-dimensional digital elevation and/or terrain models (DEM/DTM) as well as digital surface models (DSM). The use of LiDAR significantly reduces the cost for developing this information.The DSMs are intended to correspond to the orthometric heights of the surface of the county including above ground features such as buildings, vegetation cover, utility structures, vehicles ... etc. DSM data are used by county agencies and others to study drainage issues such as flooding and erosion; contour generation; slope and aspect; and hill shade images. Elevation data and models are used in several different ways including:Visualization representations of the elevation data. Examples include:- A hillshaded or shaded relief image- An image representing slope- An image representing aspectAnalysis of the elevation data and analytical products which can be generated. Examples include:- Viewshed calculations for visibility and line-of-sight analysis- Areas of highest Solar energy potential- Uses in disaster management- Industrial planning- Calculation of cartographic contours- Calculation of profiles along straight lines or line segmentsThese data are derived from other data sources, no accuracy measurements or tests were conducted. Primary use and intent for these data are for visualizations and topographic analysis. This dataset does not take the place of an on-site survey for design, construction or regulatory purposes.

Access & Use Information

Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than License: See this page for license information.

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Metadata Created Date November 12, 2018
Metadata Updated Date June 14, 2019

Metadata Source

Harvested from Open data from Lake County, Illinois

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2018
Metadata Updated Date June 14, 2019
Publisher Lake County, Illinois
Unique Identifier
Peter Schoenfield
Maintainer Email
Public Access Level public
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id 8f874b67-7d93-4fc0-80ac-c25a97290270
Harvest Source Id 194c6602-9dfe-431c-a745-3d750b1d4aa6
Harvest Source Title Open data from Lake County, Illinois
Data First Published 2018-02-07T15:29:31.000Z
Homepage URL
Data Last Modified 2018-11-10T02:14:59.000Z
Source Datajson Identifier True
Source Hash d679478a137b648b674c4733c081b81ee82305cf
Source Schema Version 1.1
Spatial -180.0,-90.0,180.0,90.0

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