Monoplotting

Monoplotting is commonly used as a term for single-image mapping where image measurements are converted to 3D coordinates by intersecting the image viewing ray with a ground model / surface model.

In practical terms:

• pixel -> ray (from camera pose + intrinsics)

• ray + surface (plane / DEM / mesh) -> 3D intersection point

In weitsicht this workflow is implemented by the image mapping helpers:

• weitsicht.ImagePerspective.map_points()

• weitsicht.ImagePerspective.map_center_point()

• weitsicht.ImagePerspective.map_footprint()

All of them require (directly or indirectly) a mapper that represents the ground/surface model used for the intersection, for example:

• Horizontal Plane Mapper

• Raster Mapper

• Mesh Mapper

• GeorefArray Mapper

Related user guide: Projections and Mapping.

Camera pose

The camera pose (exterior orientation) is often described by six parameters: the position of the projection center (\(X_0, Y_0, Z_0\)) and three rotation angles (forming a rotation matrix) describing the attitude in space.

In photogrammetry, exterior orientation is often represented by angle triplets such as OPK (omega/phi/kappa) or AZK/APK (alpha/zeta/kappa). See Image Pose, Attitude, and Rotation Angles for definitions and when each notation is typically used, and Perspective Image for the basics of perspective imagery and how EOR is used.