The series or network of triangles into which the face of a country, or any portion of it, is divided in a trigonometrical survey; the operation of measuring the elements necessary to determine the triangles into which the country to be surveyed is supposed to be divided, and thus to fix the positions and distances of the several points connected by them.

The measurement of distance, length, by the use of vector lines and known measurements (points) and angles. (The paperÕs edges give immediate reference to vertical and horizontal.

Taking a variety of different research approaches to an issue, as if you're seeing it from different angles. Though different methods come up with different results, the results should be similar enough that they might be plotted on a graph as a small triangle. Somewhere inside that triangle is the real truth.

The process of determining the distance between points on the earth's surface, or the relative positions of points, by dividing up a large area into a series of connected triangles measuring a base line between two points, and then locating a third point by computing both the size of the angles made by lines from this point to each end of the base line and the lengths of these lines.

a metaphor derived from surveying and navigation to indicate the convergence of two or more viewpoints on a single position or, in social research, truth. Triangulation expercise migh, for example, involve seeing whether the results of a questionnaire are repeated in observational data. Associated with a realist approach and, largely, with early qualitative discussions of validity, triangulation is treated with scepticism by non-realists who reject the view that revelation of a single truth is the object of a research account.

In practical terms this often means that in the course of research we triangulate, that is we make use of a variety of different research strategies and methods (so we might use a survey as well as in-depth interviews).

is a research technique that involves using more than one source of criminological data to assess the validity of what is being observed.

A method of field area measurement by dividing the whole field into triangular parts whose dimensions are separately measure.