1 foot Digital Elevation Model (DEM) Integer Raster

Description

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.

Resources

Name Format Description Link
57 Integer Raster is 3.3GB zipped, 3.5GB unzipped. Floating Point Raster is 26GB zipped, 121GB unzipped. https://sa-static-customer-assets-us-east-1-fedramp-prod.s3.amazonaws.com/data.cityofnewyork.us/NYC_DEM_1ft_Int.zip

Tags

  • 1ft
  • dem
  • dep

Topics

  • Local Government

Categories