Sunday, 30 October 2011

Land surveying and geomatics

 The more traditional land surveying strand of geomatics engineering is concerned with the determination
 and recording of boundaries and areas of real property parcels, and the preparation and interpretation of legal land descriptions. The tasks more closely related to civil engineering include the design and layout of public infrastructure and urban subdivisions, and mapping and control surveys for construction projects.
Geomatics engineers utilize a wide range of technologically advanced tools such as digital theodolite/distance meter total stations, Global Positioning System (GPS) equipment, digital aerial imagery (both satellite and air-borne), and computer-based geographic information systems (GIS). These tools enable the geomatics engineer to gather, process, analyze, visualize and manage spatially related information to solve a wide range of technical and societal problems.

As America expanded, Congress enacted the Land Ordinance of 1785, establishing the familiar Midwest pattern of one-mile square sections within thirty six square mile townships. Boundaries were aligned with the cardinal points of the compass. Within the grid, major streets were run along section lines and block lengths were commonly limited to 660 feet, one eighth of a section. The coming of the railroads altered this pattern to some extent, as railroad rights-of-way often ran diagonally across sections. Railroad companies established towns with gridiron streets parallel to these oblique rights-of-way for a few blocks at each side of the railroad station, beyond which the streets were adjusted lo link up with the north-south, east-west overlying grid.

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