Photo hosting sites have a limit on maximum image dimensions (the free ones anyway). For images that have more normal ratios - 3:2, 5:6, square, etc. - that limitation is not a problem. However, when the image has one really long dimension and one really short dimension, this limitation causes the image to scaled based on the really long dimension. This panorama has a ratio of about 17:2... and a height of about 180 pixels when uploaded to Blogger :(
To work around the size limit issue, I cut the image in to a couple of sections so that the details of the image can still be seen. I did something similar with my panorama taken from the Jericho Beach Pier in Vancouver, British Columbia in another post.