One way to make a panorama landscape image is to tile several images into one. This will boost the number of pixels in the image and make it sharper. One example is shown here. This photo of Tronstadvatn (county Vest-Agder), Norway, is stiched together from several photos with the camera in vertical position. In this way the panorama created will be sharper compared to a single photo. I have used free software from Microsoft called Image Composite Editor (ICE).