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Geometry (GIS)

Geometry Portal
Geometry (Greek γεωμε"ρία; geo = earth, metria = measure) is a part of mathematics concerned with questions of size, shape, and relative position of figures and with properties of space.


geometry -
(1) [Euclidean geometry] The measures and properties of points, lines, and surfaces. In a GIS, geometry is used to represent the spatial component of geographic features.

Geometry and the Imagination in Minneapolis
John Conway Peter Doyle Jane Gilman Bill Thurston
June 1991
Version 0.91 dated 12 April 1994 ...

Geometry-symbol layer combinations
For example, adding a fill layer to a line representation rule would generate a warning because there is no polygon geometry to fill.

Close the geometry_columns table and right click the spatial_ref_sys table and select View Data View All Rows.

coordinate geometry traverse
[ESRI software] In Survey Analyst, a process of computing a sequence of survey point locations starting from an initial known point.

Coordinate Geometry
Used to construct mathematical/geometric models of a design and its environment. See also COGO.

Geometry Converters
PostGIS with shp2pgsql:
shp2pgsql -D lakespy2 lakespy2 test lakespy2.sql
e00pg: E00 to PostGIS filter, see also v.in.e00.

geometryGeometry deals with the measures and properties of points, lines and surfaces. In ARC/INFO, geometry is used to represent the spatial component of geographic features.

Civil Geometry tools are coordinate geometry (COGO) tools that utilize a heads-up interface, preserving user input and design intent. Results of these tools are intelligent graphic elements stored in the DGN. Civil Geometry includes: ...

Link (geometry): An element of geometry that connects nodes. In a polygon topology, a link defines a polygon edge. Links can contain vertices and true arcs, and can be represented as a line, polyline, or arc.

Geometry > Projective Geometry > Map Projections >
Conic Projection
A conic projection of points on a unit sphere centered at consists of extending the line for each point until it intersects a cone with apex which tangent to the sphere along a ...

Geometry Alignment removes discrepancies between geometries.
Information Transfer involves updating one dataset with information from the other.

Geometry of color elements of various CRT and LCD displays; phosphor dots in a color CRT display (top row) bear no relation to pixels or subpixels.

Geometry ratio
numeric values are proportional to the original area or length of the feature
Each field in the layer attribute table can have split policies applied.

Geometry Output functions - these are important particular for web-development when using the various javascript, flash apis ...

Geometry is complex. The geometrical algorithms needed for polygon overlay and the calculation of distances, depending on the projection/coordinate system used, require experienced programmers.

Geometry and topology; Greater than; Geologian Tutkimuskeskus = Geological Survey of Finland
G.T.
Gas tank ...

Geometry; Imperial guards
G&M
Geography and Map; geography and Map Div.

The geometry of the earth has been discussed, studied, and imagined forever. The ancient Greek philosophers tried to picture a pure geometrical model.

The geometry of the thematic data is entirely or partially described by the base geometry dataset.
The thematic dataset holds information that also describes objects of the base dataset.

The geometry of GIS data is referenced in coordinates that are embedded in the data file. Shape files that you get from ESRI StreetMap and from the ESRI Data CDs use Latitude and Longitude as the coordinate system.

In the geometry of the sphere, great circles play the part of straight lines. They represent the shortest distance between two points. Every great circle is determined by a plane that contains the center of the sphere.

About the Geometry of Datums
In order to calculate where latitudes and longitudes occur on the surface of the Earth a number of fundamental geometric concepts and practices need to be applied. In simple terms these include: ...

coordinate geometry (COGO) This refers to a data conversion process in which a digital map is constructed from written descriptions, such as legal descriptions of land parcel boundaries.

Coordinate geometry - The methods used to construct graphics mathematically in engineering design. It is usually referred to as COGO.

Coordinate system - A system used to register and measure horizontal and vertical distances on a map.

Coordinate Geometry - COGO
A method of defining geometric features through the input of bearing and distance measurements.

Coordinate Geometry
A third technique for the input of spatial data involves the calculation and entry of coordinates using coordinate geometry (COGO) procedures.

Computational Geometry
This is the discipline of developing efficient algorithms to solve problems of spatial analysis.

Figure 5-9. Geometry of an EDM (Basic Example)
OBSERVATION PRECAUTIONS ...

While the vector geometry has a large amount of models the raster model even with the newly added extensions [16] does not contain conceptually new ideas (not even the tesseral indexing is allowed).

COGO: CO-ordinate GeOmetry. Algorithms for handling basic two and three dimensional vector entities built into all surveying, mapping and GIS software. Co-ordinate Numbers representing the position of a point relative to an origin.

In ArcCatalog the geometry and data model is identified by an icon. Only file formats recognized by ArcCatalog as geographic data will be displayed.

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See also: See also: Feature, Information, Model, Map, Analysis

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