[Geotiff] algorithms for interpreting between tiepoints

[Butler, Jason]

Hello everyone,

I am implementing a geotiff reader for a client, and need some assitance
with implementing the case where a geotiff is georeferenced using 3 or
more tie-points.

Could anyone tell me what the standard method is for generating the set
of lat/long coordinates from the raster space of the geotiff when only
tiepoints is specified?

Thanks in advance,

Jason Butler.
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