The format of a panorama is defined in broad terms by the
projection used to map the full or partial 3D scene onto a 2
dimensional print or screen. There are several types of
projections in use: Full Spherical Formats There are two main
spherical formats: Equirectangular and Cubic. Both are able to
display the whole sphere that surrounds as - 360� along the
horizon, 90� up and 90� down. Specialized viewers are needed to
view spherical panoramas. |The equirectangular format is widely
used by a couple of Panorama Viewers as for example PTViewer and
SPi-V. It consists of a single image with an aspect ratio of 2:1
(that is, the width must be exactly twice the hight).| The cubic
format uses 6 cube faces to fill the whole sphere around us. The
image is remapped to the cubefaces which fit seamlessly. One
very wide spread cubic format is QuickTime VR. It consists of
one file containing the 6 faces as JPEG compressed images
together with a header giving basic information how the panorama
should be displayed. There is