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Thinning

GIS Thiessen PolygonThird Normal Form

thinning
Reducing the number of points that define a line while preserving its essential shape. Referenced by: Edge detection; Geography of the Interior United States.
third normal form ...

 


The thinning of coordinates is also required in the map generalization process of linear simplification. Linear simplification is one component of generalization that is required when data from one scale, e.g.

The Thinning function reviews all the coordinate data in a file, identifies and then removes unnecessary coordinates. Depending on scale, a number of coordinate pairs can often be significantly reduced without a perceived loss of detail ...

Forest thinning operations typically occur early in the life cycle of a forest stand. In this exercise, create a feature class from the stands (ArcInfo coverage) layer, consisting only of stands between the ages of 15 and 30.

In WinTopo, you prepare the image by first thinning the contour lines using one of the algorithms provided under the "Image" menu selection.

The sceleton is finally thinned when the thinning process converges; i.e., "no further pixels can be removed without altering the connectivity or shortening the sceleton legs" (p. 541).

Hill or ridge slopes facing the radar are subject to a distorted appearance called foreshortening expressed as a compression or "thinning" of slopes on the facing (bright-toned) side and an elongation on the side that is shadowed.

Although there have been many methods developed for line tracing, they can be divided into two groups: line thinning and line following.

Modern machines such as wood harvesters can automatically cut trees and remove branches, but an expert is still needed to plan a thinning and to mark the trees to be felled.

Recent investigations of the ozone layer have discovered areas of severe thinning located primarily at the South Pole.

Integration with stand simulation software, and the accommodation of several types of treatment (thinning, sparse cutting) are important issues in this context.

How to simplify contours by generailzing line geometry and selectively thinning the contour interval in the non-focus area.
How to export contours to DWG format with elevations.
Terrain Modeling in 3dStudio using contour data ...

Line-coordinate thinning processes can eliminate coordinates that are not essential to represent the line and can greatly reduce the disk space required to store the coordinates needed to represent the line.

in GIS packages are intersection, point in polygon, area in area, and other expressions of interrelationships between geographic entities that can be used to select, reject, merge, or query spatial data bases. Many GIS packages provide line thinning ...

Convert curves to strings with stroke control; point thinning on line strings; change fill and color tool
No limit on plot size or resolution
No limit on plot dimensions
Color PostScript output
Spot and process color separations ...

The system includes forest stands, all roads, hydrology and political boundaries, which allows use of the system for management activities such as harvest, planting, vegetation suppression, thinning and road construction.

Vector Data Maintenance and Analysis -- Introduction; coordinate editing; adding/deleting features; moving and reshaping feature; line coordinate thinning; attribute editing; vector data analysis (graphics); overlay operations; ...

Used to direct forest practices such as planting, thinning, and harvest. surface p.

See also: Information, Feature, Map, Raster, Vector