Will commons except a .geotiff file? or can the data be imported in some other way. The file will be close to the 1GB upload limit (manual uploader) in size and will be High Resolution.
Thanks
Jason
To answer this part of the question - A geotiff file is a normal tiff file annoated with some extra geo information (I believe anyways, I'm not really familar with the format, that's what google tells me). At the moment commons will interpret such a file as a normal tiff file, and just ignore all the extra geo information. So it should upload fine (provided the extension is .tiff), but it would be less then ideal as the extra data will be ignored.
But, other users might still use it. And in the long term, who knows, maybe we'll have full support for that format. Thus unless your pressed to get it under the filesize limit or it represents extra work, I'd encourage uploading as geotiff, in case its useful in some far away future, as there's not really any downside.
--bawolff