aggregation
[data editing] The process of collecting a set of similar, usually adjacent, polygons (with their associated attributes) to form a single, larger entity.
Aggregation Effects
Rainfall maps were produced for the geographic region covering the Blue basin.
Aggregation
Process of bringing together many distinct parts or categories of data into one composite grouping. In a GIS, the results of data aggregation are often displayed graphically. (Compare with Disagggregation).
Algorithm ...
Aggregation ~ sum of the values for all or a portion of the surface elements (integral); example uses include cut/fill calculations in road building and total yield estimates in site-specific management ...
AGGREGATION WITH INDEPENDENT WORKS
A compilation of the Document or its derivatives with other separate and independent documents or works, in or on a volume of a storage or distribution medium, ...
aggregation
are data available with suitable level of spatial, temporal aggregation?
Cluster: Aggregation of relatively uncommon events or diseases in space and/or time in amounts that are believed or perceived to be greater than could be expected by chance. Learn more about cancer clusters.
Diffusion-limited aggregation
DLCW
Department of Land and Water Conservation (NSW) ...
Block Feature: Aggregation of primitive spatial features grouped together to represent a single spatial feature, typically in the form of a symbol within a spatial database.
Aggregation: describes the whole-part relationship between classes
For example - a census tract (whole) is an aggregate of a number of census blocks (parts) ...
An aggregation of interacting species. Sometimes used to refer to only the assemblage of populations of a particular class of organisms, such as the bird community, the herb community, and so forth.
Flocculation Chemical processes where salt causes the aggregation of minute clay particles into larger masses that are too heavy to remain suspended water.
Stars develop within galaxies in nebulae (also called Giant Molecular Clouds [GMC] composed mostly of H2) by progressive sub-fragmentation, aggregation and contraction of gas and dust into centers of higher density.
The new design is not based on the goal to provide a sufficient quantity of addresses alone, but rather to allow efficient aggregation of subnet routing prefixes to occur at routing nodes.
Aggregation - group level (merging polygons of identical or similar properties);
Tipification - group level (reducing the complexity of polygons' group by removing, displacing, aggregating and enlarging single objects); ...
Total Fertility Rate (TFR): (Cross-sectional Aggregation:) Average number of children that would be born alive to a women (or group of women) during her lifetime if she were to pass through all her childbearing years conforming to the ...
Clustering and aggregation. Sankhya B, 37:398-417, 1975.
R. A. Fisher, H. G. Thornton, and W. A. Mackenzie. The accuracy of the plating method of estimating the density of bacterial populations. Annals of Applied Biology, 9:325-359, 1922.
M. Lloyd.
CensusCD and Maps 1990-2000 This CD is contains summary data at several levels of aggregation from States down to Zipcodes. It does not have Tract or Blockgroup data.
Graphic Data Query
Area/Perimeter/Distance Calculation
Attribute Data Query
Spatial Aggregation
Buffer Analysis
Address Matching
Polygon Overlay Analysis
Linear Network Analysis
Area Districting and Zoning ...
The "super" modeling is an iterative process. It involves creating a generic aggregation structure for the product, creating a classification structure of the various parts and assemblies used in the product, and capturing design rules." ...
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), ...
For example, the delivery system might not be capable of efficiently handling data from different projections; file formats for use in address matching might not agree with the target system; data might require aggregation in manners not efficiently ...
Unique information handling techniques were devised to standardize and computerize textual, tabular, temporal, and spatial data from forms and maps that could then be linked with GIS for spatial aggregation, statistics, and mapping.
 See also: Information, Model, GIS, Analysis, Geographic
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