Junction (geodesy)

As a node in a geodesic is surveying point or any other measurement point designated in which a plurality of measurement paths converge from different directions. Using suitable conditional equations or a mediating adjustment , the accuracy can be increased noticeably because the individual measuring sections

• correspond to a repeated calibration
• and small systematic errors act in different directions and therefore largely cancel each other out.

Junctions are used among other things

• in some national surveying methods , such as the formation of nodal networks from trusses (large-scale polygonal lines) using the Bowie method
• with exact height networks (see also precision leveling )
• with GPS leveling and with quasi-difference GPS
• for coordinate transformations at national borders.

The combination of photogrammetric aerial photographs to form an image block or an aerotriangulation can also be done using nodes (see also control point ).

literature

• Heribert Kahmen: Surveying , 19th edition, De Gruyter publishing house, Berlin
• Karl Kraus: Photogrammetry Volume 1, 7th edition, de Gruyter, Berlin 2004.