The extraction of 3-dimensional measurements from 2-dimensional photographic images.
A drone can survey large land mass and industrial site areas in a shorter time frame than on foot. Inaccessible areas such as roofs, rock faces and ravines can be measured in full. Combining images from the ground building elevations can be captured in superior detail for general and heritage purposes. The 3-dimesional model is a useful visual accompaniment to 2-dimesional drawings.
A mosaic of overlapping photographs are taken from specific angles to capture the subject. Sophisticated software analyses the images for corresponding geometry to tie images together. Ground control point targets are distributed in the scene and measured in a coordinate system to scale and georeference the data.
A high resolution 3-dimensional textured mesh and point cloud are created. This data can be used as reference to 3D model in Autodesk Revit and for 2D linework in Autocad software.
Architectural orthographic projections can be produced directly from the model, in certain circumstances forgoing the need for linework drawings.
Land project meshes are used for surface, volume and hydrology analysis. Standard topographical survey drawings can also be extracted.