Generalization is a foundational element of logic and human reasoning. Generalization posits the existence of a domain or set of elements, as well as one or more common characteristics shared by those elements.
generalization
See Also: cartographic generalization, database generalization
[map design] The abstraction, reduction, and simplification of features for change of scale or resolution.
Raster Generalization
The Raster Generalization tools are used to either clean up small erroneous pixels in the raster or generalize the data to remove or smooth out unnecessary detail.
Generalization Maps contain a certain level of detail depending upon its scale and purpose. Large scale maps usually contain more detail than small scale maps.
Generalization
Removal of detail from a data layer to make processing or visualization easier at smaller scales.
Geocentric Datum
A geocentric datum is a datum, which has its origin at the Earth's center of mass.
[edit] Generalizations
Voronoi cells can be defined for metrics other than Euclidean (such as the Mahalanobis or Manhattan) distances.
Generalization hierarchy - A concept in E/R modeling that defines a subset relationship between the elements of two or more classes, e.g. the class PERSON is a generalization of the class MAN and WOMAN.
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The generalization of a sphere in dimensions is called a hypersphere. An -dimensional hypersphere, also known as an -sphere (in a geometer's convention), that is centered at the origin can therefore be specified by the equation
(14) ...
The generalization was and remains the most complex task of cartographers demanding talent and skills. The automation efforts on this field did not lead yet to a comprehensive solution. One can not expect that a GIS task solver, e.g.
As a generalization, the Great Plains scenes appears similar to some western Interior Lowlands scenes, both of which, are dominated by farmland.
- Map Generalization that fits a functional form to the entire data set (e.g., polynomial surface fitting).
Figure 1-1. Point density map aggregating the number of customers within a quarter of a mile.
Binary line generalization
BLIS
Brownfields Location Information System (Wisconsin Dept. of Commerce) ...
abstraction, generalization and selection of relevant concepts, processes and relationships in the real world
conceptual modeling of the relationships between abstract entities
mathematical modeling of the relationships between defined entities ...
Some tentative generalizations about what philosophy is
So philosophy, it seems, is a discipline that draws on knowledge that the average educated person has, and it does not make use of experimentation and careful observation, ...
generalization p. 83 In cartography, conversion of a geographic representation to one with less resolution and less information content; traditionally associated with a change in scale. geodetic p.
Inferential Statistics Statistical test that makes generalizations about a population based of the numeric information obtained from a sample based on the laws of probability.
Maps are abstractions or generalizations of reality. Map makers are allowed to emphasize certain parts of their maps to accomplish their goals. The users of GIS today are often not aware of the limitations of conventional maps.
- GENERALIZATION AND SPECIALIZATION
Hierarchical structures required for management of properties and methods in GIS
Generalization and Specialization create the structure in which objects can be grouped into superclasses and subclasses.
One of these principles is the concept of generalization, which deals with the content and detail of information at various scales. The GIS user can change scale at the push of a button, but controlling content and detail is often not so easy.
Retrieval, Reclassification and Generalization
Perhaps the initial GIS analysis that any user undertakes is the retrieval and/or reclassification of data. Retrieval operations occur on both spatial and attribute data.
Much of chapter two (Scale, Perspective and Generalization) is devoted to map projections. The chapter begins with a discussion on scale. Then a description of distortion and map types (conformal and equivalent) is included.
New generalization algorithms
Automatic and Interactive Modes
Topologically ready linework
Point, stream, and arc modes
Gap jumping
Continue at intersections
Line straightening
Generalization
Raster Snap
Convert contours ...
Winkel in 1921 is a generalization of Eckert's V using the equidistant cylindrical projection with any two opposite parallels standard, not necessarily the Equator (therefore only the horizontal scale is changed from the special case).
The main problem in Automated Cartography is to use a single set of data to produce multiple products at a variety of scales, a technique known as Generalization.
In addition, through the process known as generalization, the amount of information was reduced to make the smaller scale map readable. [LINK] Continue to Site selection or Return to GIS index Site selection The U.S.
The fallacy of the Ecological Inference: Aggregated data are generalizations that may tell us something about the character of an area or its people as a group, ...
State Soil Geographic database (STATSGO) was digitized from 1:250,000-scale topographic maps, on which a generalization of the detailed soil surveys was mapped.
1. What steps can be taken to minimize the effects of generalization and error in digital data obtained from maps?
2. "In a computer environment, there is no longer any useful distinction between topographic and thematic maps". Is this true?
Note that this architecture is a generalization of the vector-based architecture, where the navigation solution used to aid the signal processing can be provided by an external reference.
All spatial datasets are generalized; however, raster datasets more clearly show their level of generalization. A more complete discussion of generalization in relation to scale is addressed in Scale Issues.
Foote and Shannon Crum -- These notes include discussions of map elements, effective typography and symbolization, statistical generalization, and trends in computer-aided cartography. This unit contains over 60 graphics illustrating key points.
"Decision-making" refers to a more managerial perspective and to (inductive) generalizations as to how decisions are actually made... particularly with respect to how information behaviors and processes are interacting with decision-making procedures.
These misalignments occur for many reasons including survey error, cartographic generalization, and problems of map projection and compilation.
These include issues of recognition and measurement in the field; the choice between alternative representations; the roles of generalization and multiple representations; the representation of uncertain information; methods of analysis and modeling; ...
table out of source and destination tables and it still involves one field (we will call them "key" fields) in each table. It generalizes the idea of what it means for a source value to "match" the value in a destination record. This generalization ...
Only at a scale of 1:1 could physical data be depicted at its true size and in complete detail. As use of this scale is rarely practical, all features and thematic data shown on a map must undergo a process of simplification, generalization ...
Creating an SVG Tiny document, adjusting for screen resolution and populating with information from the map service
Additional optimizations, trade-offs between interactivity and document size, concatenating path fragments, line generalizations and ...
There are many other examples of data manipulation that are routinely performed in GIS. These include projection changes, data aggregation (for example, to convert sales territories for census building blocks), and generalization (weeding out ...
DIME was replaced by TIGER for the 1990 Census. generalization In general, reducing the number of points used to represent a line. In ArcInfo, the process of removing vertices from arcs according to a specified tolerance.
 See also: Information, Analysis, Model, GIS, Relation
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