MicroStation Users read ChartTiff without Header Modifications
Bentley Systems has developed a "Raster Manager" module for MicroStation
which enables accurate georeferenced display of "standard" ChartTiff
files with the Geotiff key denoting the linear units for the image.
Raster Manager is an optional add-on at this time, but will be standard on
future releases of MicroStation, completely replacing the current
MicroStation "raster reference file" functionality.
Bentley's "standard" assumed that linear units were meters, and
provided no parameters to designate the linear units as being anything else.
Bentley has built in to Raster Manager the ability to interpret the "ProjLinearUnitsGeoKey"
to facilitate the use of images with linear units other than meters.
ChartTiff images work correctly with MicroStation (version 07.01.04.10 released 25 May 01)
and Raster Manager (version 07.14.07.04 released 7 May 01).