Control points are fixed points of known coordinates.Contour lines that are relatively close together depict an area of steep terrain on the Earth's surface. Lines joining points of equal height as shown on a topographic map.The difference in elevation between adjacent contours as delineated on a map.A compass magnetic bearing must be converted to a grid bearing for plotting on a map. The compass circumference is divided into degrees from which a bearing of a chosen direction from magnetic north can be determined. The magnetic compass has a pivoting magnetised needle that always points to magnetic north (geological features may influence readings).A De Lisle's pendent clinometer was used by surveyors and engineers to set out slopes and gradients in the construction of paths, tracks and roads. An instrument used to determine the angle of elevation or depression.It includes images of all survey plans registered in Queensland. The computer inventory of survey plans (CISP) is a database that provides current and historical survey plan information.Special purpose navigation maps chiefly used for nautical, aeronautical and mapping of the cosmos.This includes the construction of projections, design, compilation, drafting and reproduction. The art and science of the production of maps.A map depicting land parcels and associated nomenclature.Cadastral surveying is the process of determining and defining land ownership and boundaries. A Latin term from cadastre referring to a registry of lands.The collective administration was managed by a body corporate. Both plan types are characterised by collectively administered subdivisions. Building unit plans (BUPs) and group title plans (GTPs), are plan types that existed under the Building Units and Group Titles Act 1980, which has been superseded by the Body Corporate and Community Management Act 1997.A mark carved in a tree trunk at about breast height, signifying close proximity of a survey line.A permanent object, natural or artificial, displaying a marked point whose elevation above or below an adopted datum is known.the cardinal point indicating the direction of deflection from the meridian (E or W).the angle measured from the nearest end of the meridian.the cardinal direction of the nearest end of the meridian (N or S).The angular measure is always within the range of 0–90 degrees. Bearings are used to indicate angular orientation with respect to the Earth.The point and scribe are separate units, mounted to slide and clamp on a long beam. A drafting instrument used for drawing circles with a long radius.The baseline accumulates distances throughout a triangulation network, extending to other baselines, providing further integrated control. Surveys refer to the baseline for coordination and correlation. ![]() It is established with the utmost precision available at the time.
0 Comments
Leave a Reply. |