TIFF Tag ModelTiepointTag
| IFD |  | Image |
|---|---|---|
| Code | 33922 (hex 0x8482) | |
| Name | ModelTiepointTag | |
| Type | DOUBLE | |
| Count | N = 6*K, with K = number of tiepoints | |
| Default | None |
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