Visual Plane
every picture states the point it is correct from
Concept

Cylindrical projection — where it appears

2 essays name this object, across 2 fields. What follows is each of them, and the objects they name alongside it.
fitted conic: 1.467 from being a circlecylinderthe samples, fitted

The cylinder, and the price of going all the way round

A cylindrical picture can hold three hundred and sixty degrees, keeps every vertical vertical, and bows every horizontal. Its cost is a stretch of sec φ in elevation, which is also the equirectangular surface's cost exactly — two surfaces that are always described as different and are identical in the one respect anybody notices.

curved · cylinder flat picture plane — straight lines stay straightcylindrical picture surface — even stretch, bowed linesone scene, two picture surfacesneither is the distorted one

When the picture surface is not flat

A flat picture plane keeps straight lines straight and stretches the edges without bound. A cylindrical one spreads the stretch evenly and bends every straight line that is not through the axis. Neither is the distorted one — they are answers to different questions, and the choice decides what a wide view can be.

viewing · surface

Named alongside it

The objects these essays reach for when they reach for this one.

EquirectangularPanoramaAnisotropyAzimuthConicEdge stretchElevationfield of viewFisheyeHorizonPicture surfaceVanishing point

All concepts