LIDAR data captured to provide highly detailed surface model of the Capital
April 2006: Cambridge – The GeoInformation Group, publishers of Cities Revealed high-resolution aerial photography, announces the availability of new LIDAR data for London. These height data were captured during Autumn 2005 using advanced LIDAR technology aboard an aircraft to produce a highly detailed surface model for the entire 160 square kilometre area of Central London.
Light Detection and Ranging (LIDAR) is an airborne mapping technique that uses a laser to measure the distance between the aircraft and the ground. The aircraft, which flew at a height of around 1500 meters above ground level, produced a highly defined surface model of the ground at 2m horizontal intervals with vertical measurement accuracy better than +/- 15 cm.
“The benefit of LIDAR data is the ease and speed with which we can produce height data and subsequent updates for an area”, comments Alun Jones, Managing Director and co-founder of The GeoInformation Group. “As a high-speed data capture method this potentially makes update periods shorter for clients. Furthermore, capturing the height data at an interval of two meters provides comprehensive ground coverage with highly consistent and accurate results – a crucial consideration within height sensitive projects”.
This LIDAR mapping technique results in the generation of a highly cost-effective terrain map that includes natural as well as man-made features, and is being actively used within many applications, including: flood risk assessment, land mass calculations for civil engineering projects, optimum location analysis using line of sight for CCTV and network planning, building planning control, emergency planning and transportation analysis.
Cities Revealed LIDAR data is provided in a format that can be integrated directly with GIS software. In addition and exclusive to The GeoInformation Group, CR Building Heights data (a comprehensive database that provides height information for each unique building block) is derived from LIDAR data and is compatible with OS MasterMap for use within GIS applications.
Current clients of Cities Revealed LIDAR data are wide ranging and include regeneration and development agencies, local government, airport authorities, Police and Fire services, telecommunications and water organisations.
Editorial enquiries, contact Nikki Jones or Rachel Widdicombe on tel. 01223 880077
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About the GeoInformation Group
The GeoInformation Group is a privately owned geospatial imagery company based in Cambridge, UK, with offices in South Africa and partners in France, Belgium, Switzerland, Ireland and Japan.
The GeoInformation Group is one of Europe's leading providers of high-resolution ortho imagery products. Its aerial imagery products are published under the brand name Cities Revealed. Orthorectified aerial imagery is available on CD-ROM from over 250 cities including London, Paris, Amsterdam, Brussels, Berlin, Tokyo, Johannesburg and many other major urban centres across Europe and Africa.
It also provides mapping services for specific client needs and has undertaken contracts to provide bespoke image databases across the world.