Height Data & LiDAR 2017-02-13T10:48:32+00:00

Height Data & LiDAR

Comprehensive range of height & LiDAR data suitable for Local Authorities, Government agencies,  private sector engineering, environmental & planning consultancies.

Height data & LiDAR from Joanna James Map Portal.

Datasets available

Joanna James have got the lot. Check out the overview below of all height data & LiDAR sets currently available.

Supplier Dataset Name Resolution Vertical Accuracy Coverage DTM or DSM Data Collection Method
Environment Agency EA LiDAR 2m-0.25m +/- 15cm Coastal, flood risk and urban centres Both LiDAR and photogrammetry
Ordnance Survey OS Terrain 5 5m +/- 1.5m Urban, +/- 2.5m Rural GB DTM Photogrammetry, topographical survey
Ordnance Survey OS Terrain 50 50m +/- 4m GB DTM Photogrammetry, topographical survey
Intermap Nextmap 5m +/- 1m GB Both IFSAR
LPS LPS OS NI 10m +/- 1m NI DTM Photogrammetry
Airbus Defence & Space Astrium LiDAR 2m – 0.5m +/- 15cm 100+ GB urban areas Both LiDAR
Blom Blom LiDAR Up to 0.25m +/- 15cm London Both LiDAR
Cities Revealed CR Height 2m or 1m +/- 15cm Numerous urban centres and environs Both LiDAR

DSM Vs DTM

Digital Surface Models (DSMs) provide a topographic model of the earth’s surface. They measure the height values of the first surface on the ground as seen from above, including terrain features, buildings, vegetation and power lines.

Digital Terrain Models (DTMs) provide a topographic model of the bare earth / underlying terrain of the earth’s surface and are usually derived from DSMs by digitally removing the man-made and vegetation features. The stated accuracy of a DTM will therefore usually be slightly lower than that of the DSM it’s derived from, particularly in areas of continuous and dense building and tree coverage.

Features & benefits.

 Our height data and LiDAR products for site landscape and topography add up to the most comprehensive online range in terms of detail and coverage.

Easy to work with, the data can be brought into CAD and GIS software to enable 3D analysis and provide important contextual information for a range of applications.

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Height data & LiDAR from Joanna James Map Portal.
Height data & LiDAR for Business Professionals from the Joanna James Map Portal

Perfect for

  • Terrain modelling & visualisation

  • Site analysis & planning

  • Flood modelling

  • Line of sight analysis

  • Landscape visualisation

  • View shed analysis

Product info

We can supply the data in six main formats, and you’ll need CAD or GIS software to open and use it:

  • DXF Format Points CAD

  • ASCII Grid for GIS

  • DXF 3D Face CAD

  • XYZ – easting, northing, height CAD/GIS

  • Erdas Imagine image file GIS

  • Contours – DXF files for CAD/GIS

In most cases an Ordnance Survey-based map or aerial imagery will be needed in order to relate the height information to geographic and topographical features.

When opened in CAD/GIS, all formats are geo-referenced with an x, y location (eastings, northings on the Ordnance Survey National Grid) making it very easy to precisely overlay height data with OS mapping products. In CAD, an insertion point of 0,0 will need to be specified if prompted by the software.

  • Extensive range of formats to suit a huge variety of software and applications

  • Vast spread of resolutions to meet any needs, from contextual overviews to advanced 3D analysis

  • Full product support available from our experienced technical team

Coming soon.

Get in touch for samples in the meantime info@joanna-james.com

Order now from Joanna James Map Portal

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