NYC Open Data

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Author
NYC OpenData
Description
NYC 1foot Digital Elevation Model: A bare-earth, hydro-flattened, digital-elevation surface model derived from 2010 Light Detection and Ranging (LiDAR) data. Surface models are raster representations derived by interpolating the LiDAR point data to produce a seamless gridded elevation data set. A Digital Elevation Model (DEM) is a surface model generated from the LiDAR returns that correspond to the ground with all buildings, trees and other above ground features removed. The cell values represent the elevation of the ground relative to sea level. The DEM was generated by interpolating the LiDAR ground points to create a 1 foot resolution seamless surface. Cell values correspond to the ground elevation value (feet) above sea level. A proprietary approach to surface model generation was developed that reduced spurious elevation values in areas where there were no LiDAR returns, primarily beneath buildings and over water. This was combined with a detailed manual QA/QC process, with emphasis on accurate representation of docks and bare-earth within 2000ft of the water bodies surrounding each of the five boroughs. Please see the following link for additional documentation- https://github.com/CityOfNewYork/nyc-geo-metadata/blob/master/Metadata/Metadata_DigitalElevationModel.md
Category
City Government
Tags
dem, dep, 1ft
Rating
Current value: 5 out of 5
Data Provided By
Department of Environmental Protection (DEP) & Department of Information Technology and Telecommunications (DoITT)
Profile Picture NYC OpenData

created Aug 9 2013

updated Sep 10 2018

Activity
Community Rating
Current value: 5 out of 5
Your Rating
Current value: 0 out of 5
Raters
1
Visits
21047
Downloads
6524
Comments
27
Contributors
0
Meta
Category
City Government
Permissions
Public
Tags
dem, dep, 1ft
Licensing and Attribution
Data Provided By
Department of Environmental Protection (DEP) & Department of Information Technology and Telecommunications (DoITT)
Source Link
(none)
Update
Update Frequency
As needed
Automation
No
Date Made Public
8/23/2013
Dataset Information
Agency
Department of Information Technology & Telecommunications (DoITT)
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Size
  • 500x425

  • 760x646

  • 950x808

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425x425 is the minimum size

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