What is a flat table?

Maps, graphs and drawings related to survey and other related persecutions are done on what is called the plane table, a table with a fixed surface that can easily be equal to its height legs. The surface of the table is mounted on the tripod set of legs, which turns in any direction for its use as an assembly base for the alidada, which is a reconnaissance tool with a telescopic view. The table surfaces are usually either 18 inches of 24 inches (45.7 cm x 61 cm) or 24 inches of 31 inches (61 cm x 78.7 cm) and the height is adjustable. The criteria for a flat table station include a line of supervision that occupies as many main terrain points or buildings as possible. The straight line along the edge, which is parallel to the supervision line, gives a rendered direction from the original point to the desired man for rendering distance and direction. Alidade is a direct edge with attached telescopic view or real telescopes. The stadium arc is vertical and horizontal measuring equipment NamoNtované at the top of the telescopic lens. The level of the plain table uses hair and hairs on a telescopic lens, which is read and multiplied by the stadium interval.

Heights in sight can be measured and mapped in lines on paper that are on the surface of the plane table. The distances and differences in the measurement of altitude can therefore be carried out on site in the level of the planes table to create a map of the finished scale. In larger places in construction projects it is possible to set up several planes tables for exploring various aspects of the project.

As the coast is used in maritime mapping, the national administration of ocean and atmospheric administration (NOAA) needed to explore the territorial and marine limits of American coast for graphs and as a necessary legacy in the administration of coastal natural resources. Not only the coast, but also hydrographic surveys had to be carried out from coastal waters and all known risks located on the coast. OIn 1834, the altitudes of natural elements above the sea were mapped using flat tables at stations drawn by ships. Aircraft table mapping stations have been used for the next 20 years to complete all topographic coast maps.