I am starting a project relatively "fresh" to GeoServer. We have a large number of tiled (seabed) images to load up to GeoServer using the ImageMosaic plugin in order to make a seabed mosaic. We know the geolocation of all the images as well as the scaling. We can calculate the required rotation offsets.
When I add a rotation factor to the world file or GeoTIFF header I expect the images to be rendered rotated or "warped" but do not seem to be able to get anything other than unrotated images.
How should I prepare my image mosaic folder so that all of the images are rendered rotated? Do I need to rotate them myself before uploading to GeoServer or can I tell GeoServer/ImageMosaic to do this for me?