European Organization for Experimental ... - Host Ireland

• Assess the positional accuracy of the newly surveyed features, along with the identification
accuracy. The accuracy of High Resolution Sensor data will be compared
with conventional survey methods (aerial photography).
• Assess the cost benefit analysis of using High Resolution Sensor data over conventional
methods (aerial photography).
• Investigate the maturity of software system products used to complete the topographic
mapping
The evaluation for each section was based around the assessment criteria supplied with the
data at the start of the project.
1.4 Description of data
For this trial a 1m-resolution panchromatic mono image of the Lucerne area of Switzerland
was used. The image is the standard 'Geo Product' from Space Imaging, further details of
which may be found in the main report and in Annexe 3.
In addition to the satellite image, a raster map (1:25 000 scale) and a set of aerial orthophotos
(1:25 000 scale, 35cm pixel resolution) were provided by the Swiss Federal Office of
Topography.
2 Surveying of topographic features
2.1 Objective
To survey the topographic features in a defined area, and assign feature codes according to
each participant’s specification and requirements.
2.2 Methodology.
Two subset areas were created to perform manual extraction of topographic features. Area 1
was low-lying and contained both rural and urban features (see Figure 1). Area 2 was in a
more mountainous area containing mountain, forestry and rural features (see Figure 2).
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