I was talking about how we capture our imagery recently and now we’re seeing it put to use by the emergency services, as Leicestershire Fire and Rescue Service (LFRS) have purchased county coverage of the OS MasterMap Imagery Layer.
LFRS are going to be using the Imagery Layer in their two command support vehicles (CSVs). The CSVs are used for major county incidents and each have two computer terminals on board. These computers have geographical information systems (GIS) installed and can be used to analyse data of the incident area.
Imagery has been identified as a key dataset to be added to those LFRS already have access to under the current Mapping Services Agreement. LFRS had considered accessing imagery data via the Internet but were concerned about the reliability of web access as their CSVs travelled across the county. They wanted to have the imagery stored on the CSVs’ computers.
LFRS purchased Leicestershire county area, Leicestershire city and the Rutland area to best support their activities. The final decision was swung by the fact that 95% of Leicestershire had been flown in the 2009 and 2010 flying seasons, giving them excellent currency and accuracy to rely on.
OS MasterMap Imagery Layer is leading the market with its currency and coverage of Great Britain. Over 30% of the layer, or more than 68,000 sq km, were captured in 2009 ensuring sustained maintenance of our high quality up to date imagery across England, Scotland and Wales. Our 2010 flying season has already obtained 64,000 sq km of imagery which has been used to further refresh the Imagery Layer from June 2010.
Ordnance Survey is committed to the update and maintenance of OS MasterMap Imagery Layer. Our change-driven integrated revision programme, where both OS MasterMap Topography and Imagery Layers are synchronously updated from the same source imagery, has been welcomed by many of our existing customers, particularly those working in the rural environment.
We recognise the need to provide updates as soon as possible, but without compromising on quality. We set a target to ensure that our imagery is available to customers as quickly as possible after capture with the highest priority imagery being released through our Imagery Layer within six months of capture. Within this time frame we deliver expert colour balancing, orthorectification, quality checking and careful edgematching, all to the high standards expected by our customers. Timely release of our imagery ensures that our customers derive maximum value from a fresh and current view of the real world.