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| Photo Identifiable |
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| CompassData specializes in collecting
ground coordinates on features visible in collected imagery.
This provides a great deal of flexibility in flight and photography
sessions without the need to pre-panel and maintain control
targets. |
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| We collect GCPs on persistent features, that
is, features that will not move over time and provide maximum
visibility for a given satellite sensor look angle or aerial
flight layout. |
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When
necessary, we will use features such as paint stripes on pavement
when no other unambiguous features are available, but we strive
for more permanent types of features to ensure coordinate
availability over an extended period of time.
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