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The "globe", in the DGG concept, has no strict semantics, but in geodesy a so-called "grid reference system" is a grid that divides space with precise positions relative to a datum, that is an approximated a "standard model of the Geoid". So, in the role of Geoid, the "globe" covered by a DGG can be any of the following objects:
Because a grid is a sample of a continuous space, raster data is most commonly used to represent geographic fields, in which a property varies continuously or discretely over space. Common examples include remote sensing imagery, terrain/elevation , population density , weather and climate , soil properties , and many others.
The International Terrestrial Reference System (ITRS) describes procedures for creating reference frames suitable for use with measurements on or near the Earth's surface. This is done in much the same way that a physical standard might be described as a set of procedures for creating a realization of that standard.
The distinction must be made between a singular geographic information system, which is a single installation of software and data for a particular use, along with associated hardware, staff, and institutions (e.g., the GIS for a particular city government); and GIS software, a general-purpose application program that is intended to be used in ...
A virtual composite raster grid composed of images that are stored as separate raster files. This is stored as a polygon feature class with a row for each image including image properties such as image filenames and georeferencing information, and the shape representing the desired display extent of the image, enabling seamless composition of ...
A projected coordinate system – also called a projected coordinate reference system, planar coordinate system, or grid reference system – is a type of spatial reference system that represents locations on Earth using Cartesian coordinates (x, y) on a planar surface created by a particular map projection. [1]
An Esri grid is a raster GIS file format developed by Esri, which has two formats: A proprietary binary format, also known as an ARC/INFO GRID, ARC GRID and many other variations; A non-proprietary ASCII format, also known as an ARC/INFO ASCII GRID; The formats were introduced for ARC/INFO.
The list below is a collection of available official national projected Coordinate Reference Systems. Links to the relevant unique identification codes of the EPSG Geodetic Parameter Dataset , the most comprehensive collection Coordinate Reference Systems, are provided in the table.