European Organization for Experimental ... - Host Ireland

4 Cost benefits
4.1 Objective
To carry out a cost benefit analysis of using High-Resolution Sensor data over conventional
methods (aerial photography).
4.2 Cost analysis
To look at the costs of using this form of imagery the whole map revision process has to be
examined and not just the cost of the raw product. It has to be remembered that the cost of
acquisition and control of aerial photography in the map revision process is under 10% of
the final cost. Therefore it is necessary to evaluate the percentage cost of using this imagery
over the whole flowline of map revision.
Figure 6. Flow diagram of a typical photogrammetric map revision flowline
For this project a typical 10 x 20 km square block of Ordnance Survey 'mountain and moorland'
cyclic revision work will be evaluated (200 square km's). This is for 1:10,000 basic
scale mapping.
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