Term
Definition
Link
2.5D
2D model (map) where the altitude is encoded in the pixel value. One color corresponds to a given range of elevations.
ATP
Automatic Tie Point
Check Point (CP)
Point with known coordinates; it is useful for assessing the accuracy of the project. Contrarily to a GCP, the Check Point's coordinates are not used for the optimization procedure.
GCP
Ground Control Point
Reference point with measured coordinates. Used to georeference the project.
Reference point with measured coordinates. Used to georeference the project.
Georeference
Assignment of real world coordinates to give position and orientation with respect to the Earth's surface.
GSD
Ground Sampling Distance
Distance between the centers of two consecutive pixels. This relates to the model's level of detail.
Distance between the centers of two consecutive pixels. This relates to the model's level of detail.
Inlier (concerning uncalibrated cameras)
New match that fits with the 3D data coming from calibrated cameras.
Keypoint
Characteristic feature (sharp contrast in texture, color, etc...) identified by the software in an image.
MTP
Manual Tie Point
Orthomosaic
2D model (map) made by blending several orthophotos. Color balanced to be visually pleasing.
Orthophoto
Photo that has been corrected for perspective, as if the photo was taken orthogonally from the object.
Orthoplane
Blend of orthophotos similar to an orthomosaic but projected to any user defined plane.
Outlier (concerning uncalibrated cameras)
New match that does not fit with the 3D data coming from calibrated cameras.
Reflectance map
2D model (map) that is corrected for perspective and where the value of each pixel faithfully represents the measured object's property.
Textured mesh
3D model (mesh) made of triangles and having color information (texture). Color balanced to be visually pleasing.
LoD Mesh
Level of Details of the 3D Textured Mesh