منابع مشابه
Defense Mapping Agency Technical Manual 8358.1 Datums, Ellipsoids, Grids, and Grid Reference Systems
This manual describes the basic principles of the Military Grid Reference System and the nonstandard reference systems. It describes the method for determining references on maps and charts at scales of 1:1,000,000 and larger. It contains identifications for the grid zone designations and for the 100,000 meter squares of the Universal Transverse Mercator Grid and the Universal Polar Sterographi...
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There is a widespread misconception within the spatial science community that the three geocentric datums widely used in Australia, GDA94, ITRF and WGS84 are identical “for all practical purposes”. This is a fair assumption for navigation and many mapping purposes, however users of wide area differential GPS and precise positioning services with a precision of less than a metre are beginning to...
متن کاملDefense Mapping Agency Technical Manual 8358.1 Datums, Ellipsoids, Grids, and Grid Reference Systems Chapter 8 Portrayal of Grids on Maps at 1:1,000,000 Scale
Grid data and grid format for maps at 1:1,000,000 scale generally appear as described in this section. Except for minor differences, the design is essentially the same for Universal Transverse Mercator grids, Universal Polar Stereographic grids, and nonstandard grids. The maps usually show grid lines and ticks, their values, grid letters, and notes in the margin identifying the grid and the gri...
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Spatial professionals are required to deal with an increasingly wide range of positioning information obtained from various sources including terrestrial surveying, Global Navigation Satellite System (GNSS) observations and online GNSS processing services. These positions refer to a multitude of local, national and global datums. A clear understanding of the different coordinate reference syste...
متن کاملCaribbean datums and the integration of geographical data
Modern electronic positioning systems are capable of locating a point in the vicinity of the Earth’s surface to very high precision. Depending on the sophistication of equipment in use, whether the requirement is relative or absolute and the data processing time available, accuracy from 10 m down to a few millimetres can be achieved in three dimensions. While it is not difficult to measure the ...
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ژورنال
عنوان ژورنال: Photogrammetric Engineering & Remote Sensing
سال: 2019
ISSN: 0099-1112
DOI: 10.14358/pers.85.1.13