map extent
See Also: extent
[cartography] The limit of the geographic area shown on a map, usually defined by a rectangle. In a dynamic map display, the map extent can be changed by zooming and panning.
map extent : The rectangular limits (xmin,ymin,xmax,ymax) of the area of the Earth's surface you want to display using ARC/INFO. The geographic extent specified by the minimum bounding rectangle of a study area.
map extent
1. The rectangular limits (xmin,ymin and xmax,ymax) of the area of the Earth's surface displayed using ArcInfo. Map extent is specified in the coordinate system of the coverage or other geographic data set used.
Clip map extent to an area
Interoperability and data sharing enhancements
Bring in web services and use geocoding to create apps directly in numerous languages ...
Minimum Bounding Rectangle The rectangle defined by the map extent of a geographic data set and specified by two coordinates: xmin, ymin, and xmanx, ymax. Model
An abstraction of reality.
A coverage stores geographic features as primary features (such as arcs, nodes, polygons, and label points) and secondary features (such as tics, map extent, links, and annotation).
In ESRI ArcGIS Desktop, a Data Frame is an element of the ArcMap user interface that displays a collection of layers drawn in a particular order for a specific map extent and map projection.
of the screen: CANCEL BOX POINT Select type of zoom You have the option to identify the map extent of the zoom window using either the mouse to define a box, or the mouse to mark a center point from which to enlarge the image.
Create dynamic legends that only show the information displayed in the current map extent
New options to the legend for setting a fixed legend size and for displaying feature counts and word wrapping.
1993-07: Xerox PARC Mapserver, The first mapserver based on CGI/Perl, allowed reprojection styling and definition of map extent.
1994-06: The National Atlas of Canada, The first version of the National Atlas of Canada was released.
There are several buttons and tools on the Tools toolbar for controlling map extent. You have just used the Zoom in and Pan tools. Now examine the zoom buttons:
In order from left to right, these perform ...
With reference to map extent, the larger the area being mapped the more significant is the curved surface of the Earth and, therefore, the greater the distortion of the desirable properties.
addLayers([openstreetmap]); // map extent using World Geodetic System 1984 projection var WGS84 = new OpenLayers.Projection("EPSG:4326"); var mapextent = new OpenLayers.Bounds(-123.294, 49.296, -122.953, 49.411).transform(WGS84, map.
 See also: Map, Feature, Area, Layer, Information
  
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