AWARE SYSTEMS
Programmer for hire
Private TIFF Tag ModelTiepointTag

TIFF Tag ModelTiepointTag

IFDImage
Code33922 (hex 0x8482)
NameModelTiepointTag
TypeDOUBLE
CountN = 6*K, with K = number of tiepoints
DefaultNone

Description

Originally part of Intergraph's GeoTIFF tags, but now used in interchangeable GeoTIFF files.

This tag is also known as 'GeoreferenceTag'.

This tag stores raster->model tiepoint pairs in the order

ModelTiepointTag = (...,I,J,K, X,Y,Z...)

where (I,J,K) is the point at location (I,J) in raster space with pixel-value K, and (X,Y,Z) is a vector in model space. In most cases the model space is only two-dimensional, in which case both K and Z should be set to zero; this third dimension is provided in anticipation of future support for 3D digital elevation models and vertical coordinate systems.

See also

Overview of Intergraph's private TIFF Tags
GeoTIFF specification, part 2.6.1