Aerial photogrammetry
Aerial photogrammetry
With aerial photogrammetry, we combine aerial photographic shots to create 2D or 3D models. Specifically, cartographers will combine the aerial shots, as long as the shot features at least two different angles of the same general area.
This guideline will be used for aerial photogrammetry and how the images of photogrammetry is obtained.
Photogrammetrists Analysis: Aerial and terrestrial photographs to obtain information about physical objects and the environment.
High Resolution Photogrammetry Outputs
Color point cloud
The color point cloud uses RGB data from a raster for colorization. Each point of the point cloud receives the RGB value of the raster pixel that has the same location.
Classified point cloud
The point cloud is classified in 5 predefined groups: ground, road surface, high vegetation, building, human made object. The results of the classification are used for the DTM generation.
Orthomosaic
2D image map geometrically corrected such that the scale is uniform. Color balanced to be visually pleasing.
Contour lines
These are lines connecting points of equal elevation. They allow to better understand the shape of the land surface (the topography) on a map.
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Digital surface model (DSM)
2.5 D model of the mapped area that contains (X,Y, Z) information, but no color information.
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Digital terrain model (DTM)
2.5 D model of the mapped area after filtering out objects such as buildings,that contains (X,Y, Z) information but no color information.
Reflectance Maps
A reflectance map compiles the reflectance values of each pixel and geometry into a single function.
3D Textured Mesh
A representation of the shape of the model that consists of vertices, edges,faces and the texture from the images that is projected on it.
Thermal Maps
Thermal maps are 2D maps displaying the thermal information from infrared imaging cameras for each pixel.
Index Maps
Each index is associated to an index map.
For each pixel on this map,the value of the
pixel is
derived from the associated
reflectance maps.
Applications of Photogrammetry
Clients
