This class implements a tangent plane projection
for the NEAT survey. The NEAT projection is not
a real tangent plane projection, since there is an extra
distortion, but this projection will be used for proxy
images where the distortion is not known to mark that
we do not have a standard tangent plane projection.
When the actual image is downloaded, we can provide
a combination of standard Tangent plane projecter and
NEAT distorter to correctly transform coordinates.