transform events
[linear referencing] In linear referencing, an operation that produces a new table by copying and transforming events from one route reference to another.
affine transformation
See Also: transformation
[Euclidean geometry] A geometric transformation that scales, rotates, skews, and/or translates images or coordinates between any two Euclidean spaces.
[edit] Transform
The transform stage applies a series of rules or functions to the extracted data from the source to derive the data to be loaded to the end target. Some data sources will require very little or even no manipulation of data.
v.transform -t in=watertowerXY out=watertowerUTM points=wt.points zscale=0.04 zshift=1320
SEE ALSO
v.in.ogr
AUTHOR
Radim Blazek, ITC-Irst, Trento, Italy ...
Affine transformations in 2D without fixed point (so where A has eigenvalue 1) are: ...
Geometric Transformations
This function is concerned with the registering of a data layer to a common coordinate scheme. This usually involves registering selected data layers to a standard data layer already registered.
This land use/land transformation modeling workshop will focus on three main themes: (1) the use of landscape ecology approaches for land transformation/land use change modeling, and, in particular, ...
transformation : The process that converts coordinates from one coordinate system to another through translation, rotation, and scaling ...
Transformations and Associative Procedures
In addition to nouns, our analysis requires associations. We need to model what we mean by properties NEAR subway stops. For this we will use many of the basic procedures of vector GIS: ...
Transforming the culture
Some staff members or citizens will be less receptive to the adoption of eGovernment applications due to a variety of reasons such as a fear of technology, changes in the traditional way of doing their work, etc.
TRANSFORMATION AND CONSTRAINED ADJUSTMENTS
B-56. The next step is derivation of transformation parameters between minimally constrained adjusted vectors and selected points in local geodetic system.
transform fault A plate boundary that ideally shows pure strike-slip movement. Associated with the offset segments of midocean ridges.
transported soil A soil that has been moved from the site of its parent rock.
- transform to common reference,
- store the geographic data using co-ordinates as keys,
- georeferencing the attributive data, ...
Data Transformation/Spatial Extract, Transform, and Load
Spatial ETL ...
Data Transformation
View demo. [FLASH]
About Workbench, a semantic translation engine that eliminates the need for custom translation software ...
Local Transform Tools
This new tool box is designed to perform local transformations inside a raster. All the data used with these tools come from and go to the same raster.
Format Transformations
Format is the pattern into which data are systematically arranged for use on a computer. Format transformations are used to get data into acceptable GIS format.
Transform attributes
Obtain properties of features, such as area, length, and coordinates
Save the current selection ...
Transformation. On the subject of the evolution of GNSS, during the period 2008-2012, a transformation in the way that precision GNSS is delivered to users will begin.
Transforming an image is as simple as selecting the desired target coordinate system and picking a datum shift.
The transformation from the latitude and longitude co-ordinates into the geocentric co-ordinates is rather straightforward and turns ellipsoidal latitude (j), longitude (l) and height (h) into X,Y and Z, ...
the transformation is made to the surface of a cone tangent at a small circle (tangent case) or intersecting at two small circles (secant case) on a globe ...
The transformation of map information from a sphere to a flat sheet can be accomplished in many ways. Mapmakers have invented projections that show distances, directions, shapes, or areas as they are on a globe, at least partially.
Affine transformation - A combination of linear transformations (rotation and scaling) followed by translation (shift of position). In geographic data processing, affine transformation is used to register maps of different scales and origins.
...
- data transformation
Most GIS's support advanced transformation utilities for transforming data from one format to another and from vector to raster and raster to vector models.
- data analysis ...
2. New transformation method for map projection using Delaunay Triangulation, in addition to the least square bi-linear method.
Retrieve, transform, and combine data elements efficiently.
Search, identify, and route a variety of different data items and score these values with assigned weighted values, to facilitate proximity and routing analysis.
Geometry > Transformations > Miscellaneous Transformations >
Area-Preserving Map
A map from to is area-preserving if ...
Coordinate transformations defined by mapping relations
Usually those relations are not functions (e.g., the same point on the sphere may be represented by several points on the map).
3) Apply the transformation matrix to each pixel on the image to map the old location to the new location. In the case of DEMs, each point has three dimensions while L1A data has two dimensions and involves only planar transformations.
Before using transform, the output coverage must exist with a TIC file containing x, y values in real world coordinate units. The coverage to transform must contain coordinates in digitizer units.
map-to-page transformation The process of positioning and scaling a map on a graphic page. It controls how coverage coordinates are transformed into graphics on the display screen or plotter page.
Figure 1-5. A transformed display of the difference map shows travel-time advantage as peaks (red) and locations with minimal advantage as an intervening valley (yellow).
elastic body transformation
A least-squares computer software program run against a raw digitized data source map to produce a geographically true "X" and "Y" coordinate database referenced to any standard map system.
A mathematical transformation of he earth's surface to create a flat map sheet. The UTM projection is well suited for small areas.
Unzip/Zip ...
No map projection transformation can maintain scale everywhere. Angles, areas, distances and directions will be altered in the planar representation of the ellipsoidal earth.
For information on transformations to other grid systems:
New Zealand Map Grip from Land Information New Zealand, the official mapping agency of NZ ...
General Coordinate Transformation Package (software); Geographic Coordinate Transformation Package (software)
GD
Geologic Div. (USGS); Geospatial data; Graphic digitization ...
GIS data conversion transforms data from its current format (usually paper maps or related sources) into a digital format. In some cases, the data is already in a digital format, but often this data is not compatible with the current system.
usually in the form of a computer database, to emphasize spatial themes, entities and relationships; operate upon these representations to produce more measurements and to discover new relationships by integrating disparate sources; and transform ...
Snow pellets often fall for a brief time period when precipitation transforms from ice pellets to snow. Snow pellets can be easily distinguished from packed snowflakes as they tend to bounce when they strike the ground.
Vegetation and soils information contained in transformed thematic mapper data. Pages 1465-1470 in Proc. IGARSS' 86 Symp. ESA SP-254. CURRAN, P. J. 1985. Principles of remote sensing. Longman Group Limited, London, U.K. 282pp. DAVIS, F. W., AND J.
Since much of the information in a GIS comes from existing maps, a GIS uses the processing power of the computer to transform digital information, gathered from sources with different projections to a common projection.
coordinate transformation Source: GETIS glossary A mathematical operation on coordinates that includes a change of datum.
This transforms the raw or legacy geographic data into a format usable by GIS products.
Transform Fault:
A strike-slip fault that connects offsets in a mid-ocean ridge.
Transgression:
An advance of the sea over land areas. Possible causes include a rise in sea level or subsidence.
Transpiration: ...
Tukey The Fast Fourier Transform and its impact on scientific research.
Ole-Johan Dahl and Kristen Nygaard, inventors of the proto-object oriented language SIMULA.
Edsger Dijkstra for algorithms, Goto considered harmful, rigor, and pedagogy.
Power transmission lines should be continous from the generating station to the end of the high tension distribution, normally a transformer station ...
It is likely that data types required for a particular GIS project will need to be transformed or manipulated in some way to make them compatible with your system.
Data which are recorded to some other system must be transformed/projected to the required co-ordinate system.
All spatial data should be to the same spatial resolution, or scale.
The process of systematically transforming positions on the Earth's spherical surface to a flat map while maintaining spatial relationships, is called map projection.
Not formed by a projecting light source, Mercator's projection is a completely mathematical transformation of the earth onto a rectangular map. It was presented in 1569 by Gerhard Kremer, known as Mercator, the Latinized version of his name.
But unlike maps, the purpose of GIS is to maintain geographic data in a state(s) that may be transformed, processed, and analyzed in ways that are geographically uniform.
Contents > Map projections > Getting started with map projections > An overview of map projections Geographic coordinate systems (all topics) Projected coordinate systems (all topics) Geographic transformations (browse all topics) Supported map ...
/* Function: utmzone(geometry) DROP FUNCTION utmzone(geometry); Usage: SELECT ST_Transform(the_geom, utmzone(ST_Centroid(the_geom))) FROM sometable; */ CREATE OR REPLACE FUNCTION utmzone(geometry) RETURNS integer AS $BODY$ DECLARE geomgeog geometry; ...
Because of the non-rigorous relationship between AGD66/84 and GDA94 and inaccuracies in AGD, the transformation parametres between the two vary across the country.
Automated Polygon Processing: Software utility that transforms primitive vector boundaries and text labels into polygon data models able to support spatial analysis operations.
Map Projection - A mathematical model that transforms the locations of three dimensional features on the Earth's surface to locations on a two-dimensional surface.
A map projection is a representation of the earth's surface on a flat plane using one of many orderly planar grids to transform the geographic grid (latitude and longitude) from its actual spherical form to a flat surface.
A technique of data transformation which compares the values of an input data set to a specific given value, the threshold.
 See also: Information, GIS, Model, Map, Analysis
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