Height Data - NEXTMap

NEXTMap® Britain provides customers with highly accurate Digital Elevation Models which model the ground surface in great detail.

  • An elevation point provided every five metres and a vertical accuracy of one metre
  • Selected more densely populated areas are available with a vertical accuracy of 50 centimetres 
  • A digital orthorectified radar image (ORI) data set is also available providing a highly detailed grey scale image of the earth’s surface
  • Available as a DSM, DTM and Contours at 5m or 10m postings

Usage

  • The NEXTMap® Britain datasets are an invaluable working resource for a wide range of professionals from engineers and environmentalists to land use specialists, government agencies and many more
  • The DSM is perfect for applications such as radio signal propagation analysis, noise and wind modelling or to create 3D landscapes in combination with aerial photography
  • The DTM also known as a “Bald Earth” model, removes trees and vegetation, buildings and other man-made structures to expose the underlying terrain

Specifications

Specific details for NextMap height data.

5m Contours:

  • Coverage: England, Scotland and Wales
  • Scale: Digital Contours are available at 5m intervals
  • Frequency: Captured during 2002-3
  • Formats: Vector (Microstation® DGN or AutoCAD® DWG and DXF)
  • Accuracies: Horizontal accuracies are +/-2.5m horizontal (1 sigma) on slopes less than 20 degrees, vertical accuracies when flown at 30,000 feet is +/-1.0m RMSE, when flown at 20,000 feet is +/-0.7m RMSE
  • Supply: Email Download, FTP, DVD, Data Streaming (WMS, WMTS, WFS)
  • Licensing Options: Annual

Digital Surface Model (DSM) & Digital Terrain Model (DTM):

  • Coverage: England, Scotland and Wales
  • Scale: Available at 5m and 10m postings
  • Frequency: Captured during 2002-3
  • Formats: Vector (Microstation® DGN or AutoCAD® DWG and DXF)
  • Supply: Email Download, FTP, DVD, Data Streaming (WMS, WMTS, WFS)
  • Licensing Options: Annual

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