Vertical & oblique photogrammetry
The goal of digital photogrammetry is to establish the geometric relationship between an object and a digital image and derive spatial information about the object strictly from the image.
We can differ 3 distinctive types of digital photogrammetry as follows:
Close range digital photogrammetry refer to collecting spatial information of some object by taking photos from quite short distance and from the ground. This is usually applied for building’s façades, monuments or any object of importance.
Aerial digital photogrammetry refer to collecting spatial information of wider objects and ground surfaces by taking photos with camera, mounted in an aircraft or by using drone’s internal or external camera. Aerial digital photogrammetry includes as well the following:
- Aerial triangulation–process of establishing relationships between individual image coordinate systems and defined datum and projection of the ground
- DEM and DTM generation – generation of Digital Elevation Model and Digital Terrain Model as an output.
- Digital orthophoto generation – making digital measureable image of an object considering centre of projection as it is infinitely far away.
- Mosaicking of digital images – what actually means that radiometric properties of adjacent images should be accorded at overlapping areas of individual images in order to make final larger image.
Satellite images photogrammetry
GEOTAUR is fully educated and experienced to process satellite images in order to get topographic maps, hydrologic maps, digital terrain model, orthophoto and for many other applies.