GB/T 16818-2008Specifications for short to medium ranges electro-optical distance measurements (English PDF)

1 Scope

This standard specifies the use of the measuring range is within 15km of EDM (including total station) in progress, and the level of short distance measurement

Accuracy requirements, technical methods, workflow and distance calculation method.

This standard applies to control survey, topographic survey, engineering survey and other measurement operations, the short-range optical distance.

2 Normative references

Following standard terms of this standard reference and become the standard terms. For dated references, subsequent

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research

Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

JJG703 geodimeter

JJG414 theodolite

JJG100 total station electronic speed measuring instrument

CH1002 mapping products for inspection, acceptance

CH1003 Plotting Product Quality Standards

CH/T 2004 measurements outside the industry, the basic provisions of electronic records

3 Symbol

Symbols used in this standard as follows.

D '--- observation distance in meters (m);

D --- by measuring the corrected slope distance in meters (m);

D0 --- straight chord length in meters (m);

D1 --- horizontal distance or the reference ellipsoid of the chord length, in meters (m);

D2 --- horizontal distance or reference ellipsoid arc length in meters (m);

H1, H2 --- measuring point reference ellipsoid height in meters (m); ellipsoid elevation in place of normal height;

K --- refraction coefficient (~0.13);

4 Basic requirements