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**Wish List / Deleting of Previews or Astrometric solutions really necessary?**

« **on:**2020 January 21 02:59:25 »

1. Previews and geometrical transformations

When trying to apply a geometric transformation (one of the processes Crop, DynamicCrop, FastRotation, IntegerResample, Resample, and Rotation) to an image containing a preview, the following Warning is displayed:

2. Astrometric solution and geometric transformations

The like holds for images containing an astrometric solution. When trying to apply a geometric transformation to an image containing an astrometric solution, the following Warning is displayed:

Bernd

When trying to apply a geometric transformation (one of the processes Crop, DynamicCrop, FastRotation, IntegerResample, Resample, and Rotation) to an image containing a preview, the following Warning is displayed:

Code: [Select]

`"The following items will be deleted as a result of the geometric transformation: Previews`

Some of these side effects could be irreversible. Proceed?"

This is correct for the processes DynamicCrop, Rotation, Resample and IntegerResample. However, for rotations by multiple of 90 degrees, and for Horizontal and Vertical Mirroring, the coordinates of the preview could be easily transformed as well, thus making possible the preservation of the preview in the resulting image.2. Astrometric solution and geometric transformations

The like holds for images containing an astrometric solution. When trying to apply a geometric transformation to an image containing an astrometric solution, the following Warning is displayed:

Code: [Select]

`"The following items will be deleted as a result of the geometric transformation: Astrometric solution`

Some of these side effects could be irreversible. Proceed?"

This is correct for the processes Crop, DynamicCrop, Horizontal and Vertical Mirror, Rotation, Resample and Integer Resample. However, for rotations by multiple of 90 degrees, it doesn't seem to be necessary. In these special cases it should be possible to adjust the astrometric solution accordingly.Bernd