grid - [cartography]
(1) In cartography, any network of parallel and perpendicular lines superimposed on a map and used for reference.
See Also: ESRI Grid
[cartography] In cartography, any network of parallel and perpendicular lines superimposed on a map and used for reference.
A grid system allows the location of a point on a map (or on the surface of the earth) to be described in a way that is meaningful and universally understood.
A discretely uniform unit that represents a portion of the Earth. such as a square meter or square mile.
Grid-based map analysis is increasingly used to characterize conditions and impacts of infrastructure networks, such as pipe and power lines.
Grid Generation and GIS
Grid generation is a broad field with applications in aerodynamics, material science, biology, earth science, chemistry and physics, for example.
Grid templates available with the installation
A number of grid templates are delivered with ArcGIS and are located under the ArcGIS installation directory (\ArcGIS\Desktop10.1\GridTemplates).
The UTM Grid - Section 3
Section 3 - Rectangular Grid References
At one time or another, most of us have used a city map to find the location of a street. Such maps are usually divided by vertical and horizontal grid lines.
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The grid drawing may be turned off by using the -n flag.
The border drawing may be turned off by using the -b flag.
The coordinate text may be turned off by using the -t flag.
Grid layers are graphical representations of the ArcGIS and ArcInfo implementation of the raster data model. Grid layers are stored with a numeric value for each cell.
GIS data layer in raster format (cell-based representation)
Grid Snaps: It is difficult to put your mouse exactly on (90,90,0) isn't it? Right now, our drawing has a resolution down to the inch. Our life would be simpler if we could make out mouse snap to even increments of 10 feet.
grid -- (1) a set of grid cells forming a regular, or nearly regular, tessellation of a surface; (2) a set of points arrayed in a pattern that forms a regular, or nearly regular, tessellation of a surface.
A pattern of regularly spaced horizontal and vertical lines forming square zones on a map used as a reference for establishing points. Grid examples are UTM, MGRS, and Maidenhead.
GRID: A United Nations program to assemble, use, and disseminate data sets of global extent of use to United Nations and other agencies.
grid cell: A single cell in a rectangular grid.
Grid: A geographic data model representing information as an array of equally sized square cells arranged in rows and columns. Each grid cell is referenced by its geographic x,y location.
GRIDA fully integrated grid(cell-based) geoprocessing system for use with ARC/INFO. GRID supports a Map Algebra spatial language that allows sophisticated spatial modeling and analysis.
Grid and Map Overlays
Silva Navimap -- electronic map reading / overlay device
U.K.: Yeoman PLC's Navigator Pro is a plotting table with GPS inputs that works with Admiralty charts. Quite impressive.
The grid represents lines having constant rectangular coordinates (x, y). The grid is almost always a rectangular system and is used on large and medium scale maps to enable detailed calculations and positioning.
The Arc/Info Binary Grid format is the internal working format of the ESRI Arc/Info Grid product. It is also usable and creatable within the spatial analyst component of ArcView 3.x.
4 Grid references
Store grid references in an appropriate notation for easy transition to a GIS or conversion to an appropriate map projection (e.g.
The UTM Grid
The best known use of the transverse Mercator projection is the specialized form called Universal Transverse Mercator (UTM) projection system.
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Attributes Coded with Image
Other Forms of Coding
Image and Attribute Distinction
The graphic side of a map is the lines and descriptors. Examples of these lines are rivers or roads.
Grid data sets come from many sources: remote sensing devices, converted topographic maps, interpolated point data, conversion from vector features, and derived from other features (through distance, proximity, and density calculations, for instance).
Grid placement tools for ceiling mounted equipment
Bi-directional Lighting Analysis interface to Visual Pro in design mode ...
Grid Cell Map
Map displaying spatial information in the form of color coded, equal sized rectangle, squares, equilateral triangles or hexagons.
A network of uniformly spaced horizontal and vertical lines employed to allow an exact reference to any point on a map.
Grid Index Features
Creates a grid of rectangular of polygon features that can be used as an index to specify pages for a map book using Data Driven Pages. A grid can be created that only includes polygon features that intersect another feature layer.
Grid Cell - An element of a raster data structure (see raster).
GUI - See Graphical User Interface.
Grid Referenced Information Display System; Gridded Resource Inventory Data System
Geodetic Reference System ...
The grid-zone designation.
The 100,000-meter-square letter identification.
The grid coordinates (also referred to as rectangular coordinates) of the numerical portion of the reference, expressed to a desired refinement.
tax grid, roads, major utility lines, schools, churches, recreation centers, county boundary
watersheds, WSSC grid, roads, major utility lines, schools, churches, recreation centers, county boundary ...
e.g. grid cells covering large areas
historically, natural resource GIS have been raster-based ...
7. 3D grid file creation and real time 3D display of the generated vector data. Animate the 3D display at any angle specified and see the vector data in a brand new way.
Such a grid can be placed anywhere on a map and used to assign locations to points on the map.
T-in-O maps ...
UTM Map grid and the Australian Map Grid
As is explained in the section tiled Explaining Some Jargon - Graticules and Grids there is a significant difference between the two. This is ...
Military Grid Reference System
Maine Geological Survey; Maryland Geological Survey; Minnesota Geological Survey; Mars Global Surveyor (satellite) ...
Creating a grid across the view can help to better reference the view. This can be especially important when printing out a map for later use.
After initialization the user is presented with a world map showing the currently defined Loran-C transmitters. Using zoom tools the user selects an area for coverage prediction.
in a regular grid of values, one for each cell,
a regular lattice of points or
a 'triangulated irregular network' (TIN) of points.
Digital Exchange Format (DXF)
ASCII text files defined by Autodesk, Inc.
grid - Network of uniformly spaced parallel lines intersecting at right angles.
See the Universal Transverse Mercator (UTM) Grid System. Recumbent Fold A fold in which the axial plane is almost horizontal.
Geographic References: Geographic information contains either an explicit geographic reference, such as a latitude and longitude or national grid coordinate, or an implicit reference such as an address, postal code, census tract name, ...
x coverage or grid. If you receive ARC/INFO data in interchange format you can use IMPORT71 to convert it to a data source in a format that can be added to a project or view in ArcView (or used in other mapping programs).
Smooth surface technique: A way of representing data in a raster (grid) format when multiple features would otherwise be layered upon one another at a single point. The data is added together, averaged and distributed over adjoining squares.
In raster format, a grid is used to represent the study area. The location of features in the study area is depicted by the values in the cells overlaying the feature.
Ground control refers to points on the surface of the earth with known coordinates as represented by some geographic grid reference system.
Raster : Representation as a regular grid of cells
relate : An operation that establishes a temporary connection between corresponding records in two tables using an item common to both.
It consists of using cell data (not necessarily square) arranged in a regular grid pattern in which each unit (pixel or cell) within the grid is assigned an identifying value based on its characteristics (see Vector).
Resampling - Extrapolating pixels values for a new grid from values in an old grid. It is applied after an image is rectified to a projection system or registered to another image (TWS) ...
models continuous features
a collection of grid cells
Both the vector and raster models for storing geographic data have unique advantages and disadvantages and modern GISs are able to handle both types.
The position information in a Magellan GPS receiver may be displayed as longitudeAatitude, Universal Transverse Mercator, Military Grid or other system coordinates.
Most basic element of information in a raster or grid description of spatial elements. Its shape is usually rectangular and it has an implicitly defined size and geographic position. (Also referred to as a pixel.)
Central Meridian ...
The address does not follow the standard rules of Washington, DC's addressing grid system. Types of address anomalies include, but are not limited to: wrong block, out of sequence, wrong side of street.
Value Attribute Table. A table containing attribute for a grid. In addition to user defined attributes, the VAT contains the values assigned to cell in the grid and a count of the cells with those values.
E00 - Is ArcInfo's interchange format. It is used to enable a coverage, grid, TIN and associated INFO tables to be transferred between different machines. (ESRI website - March 2010) ...
For centuries, both Greek and Chinese scientists attempted several different methods but a reliable one did not develop until the ancient Greek geographer, astronomer and mathematician, Ptolemy, created a grid system for the Earth.
A raster image comprises a collection of grid cells rather like a scanned map or photograph. Both the vector and raster models for storing geographic data have unique advantages and disadvantages. Modern GIS systems are able to handle both models.
See also: Information, Map, Geographic, Feature, Location