Triangulation

Aerotriangulation Procedure The process of aerotriangulation can be defined as the densification and extension of field control through the use of aerial photography.

TRIANGULATION 3-3. During special surveys when the need to locate the position of a point that cannot be occupied arises, triangulation is necessary. This technique places special demands on the recon party.

Triangulation from the satellite is the basis of the system. To triangulate, the GPS measures the distance using the travel time of the radio message. To measure travel time, the GPS need a very accurate clock.

triangulation A method of surveying in the location of an object may be calculated from the known locations of two other objects.

Triangulation - (1) The process of subdividing a 2-D geographic space into triangular-shaped units in digital terrain modeling. (2) The geodetic surveying process that establishes a network of horizontal control points for mapping purposes.

triangulation The method of locating an epicenter by determining how far it lies from three widely separated seismographs. transcurrent fault see strike-slip fault ...

Aerial Triangulation - (a.k.a. aerotriangulation) The mathematical process of establishing precise and accurate relationships between the individual photographic film coordinate systems and a defined datum and projection.

Aerial Triangulation The process of controlling overlapping aerial photographs so they can be used for compiling features and extracting elevation data using analytical or softcopy plotters (see Stereo Data Capture).

With the triangulation method, one first needs to know the horizontal distance to the object. If this is not known or cannot be measured directly, it is determined as explained in the triangulation article.

trilatération; triangulation; théodolite/EDM (télémètre électronique); Doppler; système inertiel; GPS; méthodes de photogrammétrie aérienne.

The first step in triangulation is to pick three topographic features that you can see and can identify on your map (mountains are ideal). Start with the first feature you have chosen and determine the bearing between you and it, as outlined above.

Brunson Electronic Triangulation System BEV Bundesamt fur Eich- und Vermessungswesen (Austria) ...

Delaunay triangulation p. 153 a network that connects each point in a set of points to its nearest neighbors; topological 'dual' of the Voronoi network. DEM p.

The new version also includes enhanced automation in the Visual Coverage Tool (VCT) batch module, a tool that performs image import, triangulation, digital terrain model extraction, orthorectification, and mosaicking. Version 5.

These 1759 maps were produced for the famous Cassini triangulation survey of France conducted in the mid 1700's.

triangulation Method of extending horizontal position on the surface of the Earth by measuring the angles of triangles and the included sides of selected triangles.

In the 17th century there is the development of surveying equipment and triangulation methods, including the logarithms, theodolite, pendulum clock, and barometric level.

These discrepancies are the differences in coordinate (x and y) values derived by comparing the data being tested with values determined during aerotriangulation or by an independent survey of higher accuracy. All remaining inputs and processes (e.g.

The work consists in capturing topographic features in 3D based on photographs in the aerotriangulation database, according to ...

Careful 'mission planning' is essential to avoid times when the satellites offer a poor configuration for triangulation or when a reduced number of satellites are visible from the observation site.

Navigation satellite receivers use this information to calculate an exact location through triangulation. Every point on Earth is identified by two sets of numbers called coordinates.

One useful field instrument for determining location on the Earth's surface under field conditions is a GPS. A GPS uses triangulation and a network of satellites to calculate location to an accuracy of less than 30 meters.

Bentley MXRENEW provides engineers with the ability to analyse the design in different ways. Using the isopachyte triangulation, a 3D model of difference between the existing and design surfaces, ...

The very high accuracy, multi-dimensional network of stations being established within Canada through the cooperative efforts of the Federal and provincial governments. It is the Canadian replacement of the convetnional geodetic triangulation network ...

3. The three corner points of each triangle in a tin. Every sample point input to a tin becomes a node in the triangulation. A triangle node is topologically linked to all triangles that meet at the node.

We can use these also to control the triangulation, preventing the creation of awkward very long acute faces, which will cause us problems if we want to manipulate the TIN by tweaking vertices in a 3d editing program.

See also: Map, Information, Feature, Location, Geographic