PHASE PHOTOGRAPMETRYor called by academic authors

Architectural photogrammetry е  a method for capturing buildings and engineering facilities using photos taken from the ground. This is a little jargon to describe one of the practical practical applications of the second major  section of photogrammetry –  earth photogrammetry.

The difference between aerial and terrestrial photogrammetry is at the place where the camera is placed, which gives the photos and the orientation of the optical axis of the lens. In aerial photogrammetry, the camera is in the air(airplane, dron, balloon, spacecraft, etc.) and its optical axis is oriented vertically to the ground. At & lt; span style = & quot; color: # ff8c00 & quot; & gt; Earth photogrammetry it is spread on the ground on a suitable tripod and the optical axis of the lens is located horizontally in the direction of the photograph.

Architectural photogrammetryis a new modern, highly accurate and highly productive technology compared to the classic facade capture technology performed by direct measurement of façade elements with the help of total stations and roller shutters.

In architectural photogrammetry, façade data is obtained after photogrammetric processing of terrestrial photos taken using dedicated cameras called phototheodolites,or normal yet high-resolution semi-professional cameras such as Canon 5D-Mark II. Using cameras of this type necessitates their calibration & amp; ndash; determining the exact focal length parameters and distortion of the lens prior to performing the process of digital photogrammetric processing of the taken pictures.

The main purpose ofArchitectural photogrammetry is to obtain a spatial (3D) pattern for each facade or for the building as a whole. Later in the processing process, the resulting spatial pattern is scaled to a real (1: 1) scale and oriented to the selected geodetic coordinate system.

Depending on the processing software used, the resulting spatial pattern can be generated in a drawing for AutoCad, ArchiCad or other CAD software & lt; RTI ID = 0.0 & gt; by screen digitization on the individual facades of the 3D model or by direct vectoring of the volumetric photographic (texture) image.

An important disadvantage of the approach to capturing photos from the earth's surface is the appearance of "invisible" fields (dead zones) on top of them, and the highlighting of tall buildings. This leads to the tear of the model and the deterioration of its texture. To compensate for this disadvantage in a company „ Precision Engineering“ EOOD a combination of multiple (several hundred photos) made from both the ground and the air using a dron is used Phantom2 Profesional  or Phantom 4.