arc
See Also: path
[data structures] On a map, a shape defined by a connected series of unique x,y coordinate pairs. An arc may be straight or curved.
[data structures] A coverage feature class that represents lines and polygon boundaries.
The ARC Macro Language (AML) is a proprietary high-level algorithmic language for generating applications in ArcInfo. It was designed by Esri in 1986 specifically for their command line-driven ARC/INFO geographical information system.
ARC/INFO is an extensive GIS with vector and raster capabilities including import, georeferencing, editing, analysis, and output.
r.out.arc input=soils output=- > out.grd
The output file out.grd can then be copied onto a CDROM or floppy disk for export purposes.
Arc See line.
Arc-node structure The coordinate and topological data structure used in most vector GIS. Arcs represent lines that can define linear features or the boundary of areas or polygons.
ARC/INFO® Export format (.e00 extension)
An Export file is an ARC/INFO coverage that has been converted to an ASCII text file in order to make it accessible to ARC/INFO systems on different platforms.
arc
1. An ordered string of vertices (x,y coordinate pairs) that begin at one location and end at another. Connecting the arc's vertices creates a line. The vertices at each endpoint of an arc are called nodes.
Arc-Info Coverage
This is a data model for storing geographic features using ArcInfo software. A coverage stores a set of thematically associated data considered to be a unit.
Arc/Info
A commercial GIS package widely used within academia. The UNIX and NT releases provide comprehensive raster and vector processing capabilities. The PC release is vector only.
ArcView ...
ARC/INFO
A full-featured geographic information system (GIS) from ESRI. (See also GIS.)
ArcGIS ...
arc A string of x,y coordinate pairs (vertices) that begin at one location and end at another. Connecting the arc's vertices creates a line.
Arc
A coverage feature class used to represent linear features (lines).
Attributes ...
ARC/INFO vs. Imagine
The District has ARC/INFO and ERDAS Imagine, which are both capable of changing raster data projections using resampling techniques. We have found ERDAS to be at least 100 to 150 times faster at projecting raster data.
Arc Generate
ArcInfo generate files were introduced in the lesson on Project and Data Management. Files that are stored in Generate format can also be imported using ArcToolbox.
Here is a generate file of the coastline of the Pacific Northwest: ...
Arc: Lines connecting nodes
accuracy, absolute : The accuracy of a map in representing the geographic location of an object relative to its true location on the surface of the Earth. Absolute accuracy is based on geographic coordinates ...
arc -- a locus of points that forms a curve that is defined by a mathematical expression.
attribute -- a defined characteristic of an entity type (e.g. composition).
Arc/INFO - The GIS software developed by ESRI that is used to do more robust GIS operations ...
Arc
1. A topological primitive that is defined by two or more X,Y coordinates. Arcs are elements in a network and may be topologically linked to form the boundaries of polygons. Also referred to as Edge. (Compare with Line) ...
back-arc basin The region between an island arc and the continental mainland, commonly with at least some oceanic crust on its floor.
[edit] ARC/INFO
The first version of ARC/INFO was launched in 1982 on minicomputers, as ESRI claims, the very first modern GIS. As computing shifted to Unix and Windows, ESRI followed launching ARC/INFO on both platforms.
island arc -- n. A curved chain of islands that rise from the sea floor, usually near a continent. The convex side usually faces the open ocean, while the concave side usually faces the continent, e.g.
ARC-GIS
ArcGIS is a family of software products that form a complete GIS built on industry standards that provide exceptional, yet easy to use, capabilities right out of the box.
Arc/node topology - Arcs represent linear and area features in a digital map. Arcs split where they intersect with one another.
arc storage
every arc is stored as a sequence of coordinates
areas are built by linking arcs
only one version of each internal shared boundary is input and stored
used in most current vector-based GISs ...
The Arc file R2V export is the same as the Arc/Info generate format. Since R2V version 5.0.6, the new file extension GEN is used to avoid confusion with some compression program. It's an ASCII format, and stores line data as: ...
Short Arc Geodetic Adjustment (doppler)
SAGEEP
Symposium on the Application of Geophysics to Engineering and Environmental Problems ...
AAT Arc attribute table. A table containing attributes for arc coverage features.
Age, Ice Lense, Ice Wedge, Igneous Intrusion, Igneous Rock, Illuviation, Infiltration, Inner Core, Inorganic, Insolation Weathering, Interglacial, Intrusive Igneous Rock, Ion, Island Arc, ...
Western New York ARC/INFO Users Group (WNYARC) (Buffalo area):
Graham Hayes
GIS Resource Group, Inc.
Roycroft Campus
21 South Grove Street
East Aurora, NY 14052-2398
Phone & Fax: (716) 655-5540
e-mail: ghayes@localnet.com ...
radian-Angle subtended by an arc of a circle equal in length to the radius of the circle 1 rad = 57.3¡. radiant energy peak-Wavelength at which the maximum electromagnetic energy is radiated at a particular temperature.
Use the Arc Tool to add the curved corners, and the Eraser tool to eliminate left-over chords.
Use the Push-Pull Tool and the Value Control Box to extrude the blocks 8 inches.
In Moses' model, "each point along this curve corresponds to a particular location along the arc IJ, and shows the one combination of factors which the firm would purchase at that particular location, given the dollar expenditure, transport rates, ...
A target that subtends an angle of 4" to 6" of arc is easy to bisect. Since 1" of arc equals 0.5 centimeter at a l-kilometer distance, 6" of arch equals 3 centimeters at a 1-kilometer distance and 30 centimeters at a 10 kilometer distance.
The technique for tiling an entire USGS quad is as follows: load the DOQQs four at a time into Arc Explorer. You do this by clicking on 'Theme' and adding a Theme. When you do this a file directory will come up. Browse to the directory where your .
[3] ARC/INFO by Environmental Systems Research Institute Inc., [4] SPANS by Tydac Technologies, [5] FMS/AC by Facility Mapping Systems Inc.
For instance, the gateway could pass the request in the form of AML to an Arc/INFO server. The Arc/INFO server generates a graphic file, which is converted to a GIF image.
The so called georelational data model of Arc/Info came up on this basis. The basic idea of the model was that the coordinate and attributive values are stored separately.
The Bentley I/RAS B Engineer tools provide for conversion of a variety of types of line, arc, shape, and text conversion and other digitizing features, such as easy replacement of raster symbols with MicroStation cells.
We are experienced using multiple GIS platforms including AutoCAD, Arc Info, Arc GIS, Erdas Imaging and other high-end softwares and specialize in utility mapping which consists of many different services including full system digitization, ...
Our use of separate systems generally reflects three major types of processing: we use 1) workstation GIS (Arc/Info from ESRI, Redlands, California) to align geographies of varying projections, we use 2) Windows- based PC-GIS (MapInfo from MapInfo ...
arc, node, polygon, and therefore can be time consuming and CPU intensive. The result of a topological overlay in the vector domain is a new topological network that will contain attributes of the original input data layers.
The encapsulation of assessment results into an Arc-GIS application provides a technical platform for applying the results in planning and operational decision making.
Arc Digitized Raster Graphics, CTI (Sherbrooke)
Canadian Digital Elevation Data, CTI (Sherbrooke)
QuoVadis Navigator, NTS maps on CD-ROM
Fugawi, NTS maps on CD-ROM
SoftMap Technologies, NTS maps on CD-ROM
OziExplorer, GPS mapping software ...
It is also necessary to select one particular semi-circular arc connecting the two poles to serve as the prime meridian for the system. The circle that lies halfway between the poles is called the equator.
The problem is that where two merged polygons share a common arc along their boundaries, the arc will disappear--but it's still in the shapefile, twice: once for each original polygon.
O
Overshoots - the portion of an arc digitized past its intended intersection point with another arc. To correct an overshoot the line segment needs to be snapped to the arc for which is was intended to snap too.
Show that the image of a line is an arc of a great circle. If the line is infinitely long, how long (in degrees) is the arc of the circle?
Describe the image of several parallel lines.
What is the image of a plane?
A good quality theodolite used for geodetic surveys would be graduated to 0.1 second of an arc and an angle resulting from repeated measurements would typically have an accuracy of about 1 second of arc, ...
Instead of commonplace degrees, minutes and seconds, in cartographic mathematics all angles of latitude and longitude are more usefully measured in radians, since the length of a circular arc can be directly calculated by its radius multiplied by ...
meridian
A meridian is a circular arc (a great circle) of longitude that meets at the north and south poles and connects all places of the same longitude. The prime meridian (0 degrees longitude) passes through Greenwich, England.
...
One type of volcanic island is found in a volcanic island arc. These islands arise from volcanoes where the subduction of one plate under another is occurring.
The Raster Map tool is used to render Raster Product Format (RPF) products such as Compressed ARC Digitized Raster Graphics (CADRG) and controlled image base (CIB).
From the scanned contour lines, elevations were sampled every 3 arc-seconds of latitude and longitude (approximately every 90 m).
For example, rivers, roads within a pizza delivery area, and electric and telecommunication networks are all linear features. Linear features are represented in ARC/INFO by arcs or by the route-system feature class.
Given two points on a sphere, the shortest path on the surface of the sphere which connects them (the sphere geodesic) is an arc of a circle known as a great circle. The equation of the sphere with points and lying on a diameter is given by
(28) ...
Nautical Mile
A unit of length used in sea and air navigation, based on the length of one minute of arc of a great circle, especially an international and U.S. unit equal to 1,852 meters (about 6,076 feet).
RFID information including the transponder ID is sent to an RFID reader when the person passes by an RFID gate. Several pieces of RFID data arc gathered on an RFID server, which sends the information necessary for positioning to the CG/PS.
Attaching a point on one draw object to the exact coordinates of a point in another draw object. You can snap the central shape point of an arc to another object or snap a routable road to an existing road, ...
Drawing Exchange Format (DXF)
An exchange format for CAD files. A format for storing vector data in ASCII or binary files; used by AutoCAD and other CAD software and convertible to ARC/INFO coverages.
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 See also: Information, GIS, Model, Geographic, Map
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