CN104596483A - Layout scheme for terrestrial photogrammetric survey camera stations - Google Patents

Abstract

The invention relates to a layout scheme for terrestrial photogrammetric survey camera stations. The layout scheme comprises the following steps: selecting the scheme in a survey area of 1km<2>-10km<2>, performing photogrammetry to ground features; according to the area S of a known surveying area, measuring the effective photogrammetric distance D for measurement, and setting two cameras with baseline length B on a camera station for shooting; moving the cameras to the next station after completion of photogrammetry every camera station, until the whole surveying area is completely measured; according to the geometric knowledge, resolving the number of the camera stations laid for completing the survey of the whole surveying area S.

Description

Station arranging network plan is taken the photograph in a kind of terrestrial photogrammetry

One, technical field

The method belongs to terrestrial photogrammetry and takes the photograph the computing method laid at station.

Two, technical background

In surveying work, sometimes to measuring a certain survey district, in order to complete measurement task more effectively and rationally, generally having following three kinds of metering systems available according to actual conditions: when survey area is greater than 10km ²time, the photogrammetric mode of employing unmanned plane on a surface target thing is measured; When survey area is at 1km ²to 10km ²time, select the photogrammetric mode in ground to obtain the some position information of object; When survey area is less than 1km ²time, need to measure by the mode of manual measurement.Therefore for terrestrial photogrammetry, reasonably laying and take the photograph website number and choose the position taking the photograph website, having great significance for completing measurement task.

Three, summary of the invention

Station arranging network plan is taken the photograph in a kind of terrestrial photogrammetry, it is characterized in that: at 1km ²~ 10km ²select this scheme in the survey district of area, carry out photogrammetric to atural object; Known one to survey the area in district be S, and measuring the effective photo distance of camera used is D, website settles two stylobate line lengths be that the camera of B is photographed taking the photograph; Each complete mobile camera afterwards of website measurement of taking the photograph establishes website to next, until completed by whole survey region measurement; According to geometry knowledge, can obtain to survey that complete Ge Ce district S needs to lay take the photograph station number N, its computing formula is:

$N=\frac{S}{\mathrm{\&pi;}{(D-B)}^2}(1+k)$

Wherein, effective photo distance D of camera, is generally about 100m; Survey the two base length B taken the photograph between website in district relevant with effective photo distance D, general B=(1/20 ~ 1/10) D; K represents the degree of overlapping of the overlay area when different survey station is measured, and the span of general k is between 0.1 ~ 0.2.

These computing method have the following advantages:

Before photography on the spot, can calculate according to known conditions the position that the number of taking the photograph website and reasonable design go out to take the photograph website exactly, so that improve the work efficiency that field operation measures.

Four, accompanying drawing explanation

Further illustrate below in conjunction with accompanying drawing with to this method.

Fig. 1 is that the process schematic taking the photograph website is laid in terrestrial photogrammetry.

Fig. 2 takes the photograph website instrumentation plan.In figure, D is the effective photo distance of camera, and B is the base length taking the photograph two cameras that website is settled.

Five, embodiment

1, select a certain survey district and determine its area S, and determining the effective photo distance D measuring camera used;

2, take the photograph at first and website settle two stylobate line lengths be that the camera of B is measured, to be measured complete after mobile camera establish website to next, measure in the same way, until whole survey region measurement is completed.

3, according to geometry knowledge, calculate and will survey complete Ge Ce district, need the survey station number N laid.

Claims (1)

1. a station arranging network plan is taken the photograph in terrestrial photogrammetry, it is characterized in that: at 1km ²~ 10km ²select this scheme in the survey district of area, carry out photogrammetric to atural object; Known one to survey the area in district be S, and measuring the effective photo distance of camera used is D, website settles two stylobate line lengths be that the camera of B is photographed taking the photograph; Each complete mobile camera afterwards of website measurement of taking the photograph takes the photograph website to next, until completed by whole survey region measurement; According to geometry knowledge, can obtain to survey that complete Ge Ce district S needs to lay take the photograph station number N, its computing formula is:

$N=\frac{S}{\mathrm{\&pi;}{(D-B)}^2}(1+k)$

Wherein, effective photo distance D of camera, is generally about 100m; Survey the two base length B taken the photograph between website in district relevant with effective photo distance D, general B=(1/20 ~ 1/10) D; K represents the degree of overlapping of the overlay area when different survey station is measured, and the span of general k is between 0.1 ~ 0.2.