What is surveying and mapping aerial photography?

Aerial photogrammetry is the abbreviation of aerial survey.

List of "Digital Surveying and Mapping Achievements"

Digital line drawing (DLG), digital elevation model (DEM), digital orthophoto map (DOM), digital raster map (DRG).

(4D) Including:

1. Comparison of reference data. Compared with the existing results.

2. Field measurement. Comparison with field surveying and mapping data

3. Internal inspection.

4. Man-machine interaction check (confusing item: structural check)

Route calculation formula

Relative height = principal distance f * scale denominator m = f * m (1: m)

Datum height = (highest point+lowest point) /2

Absolute Height = Reference Height+Relative Height

M = ground resolution/pixel size

Lx photo width; Ly photo height;

P overlapping titles; Q horizontal overlap;

Photographic baseline b = LX * m * (1-p);

Routing interval d = ly * m * (1-q);

Number of regional routes = regional width/d; ;

Number of photos per route = route length (partition length)/b;

The number of photos per route = (route length +2B)/ B, and 2B should be added because both ends are required to exceed the boundary of the shooting area by no less than 1 baseline.

Total number of photos = number of regional routes * number of photos per route.

Number of models photographed = number of regional routes * (number of photos per route-1)