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Polyline Characteristics
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Implementation
Calculates some characteristics of the polylines from a polyline dataset
Inputs:
Outputs:
- The results can be added to the input feature
class or a new polygon feature class. All attributes of the
original features are preserved
- New fields added to the attribute table
- ET_Sinous - the sinuosity of the polyline calculated as ratio of
the length of the polyline and the length of the line connecting the start
and end points of the polyline. The value ranges from 1 (case of straight
line) to infinity (case of a closed polyline). In case of infinity a 0 is
recorded in the attribute table. See illustration below.
- ET_Vert - the number of vertices of the polyline
- ET_Dir - the general direction of the polyline - the direction in
decimal degrees measured in North Azimuth
of
the line connecting the start and end points of the polyline (see
illustration below).
- ET_Parts - the number of parts that the polyline has
- ET_HasArcs - if the polyline has true arc segments - 1 otherwise - 0
- ET_Closed - - if the polyline is closed - 1 otherwise - 0
- ET_Fract - the fractal dimension (indication of the complexity) of
the polyline. The value is between 1 and 2. The more complex the
polylineis the larger the fractal dimension will be.
Notes:
-
Fractal Dimension of the polylines is calculated using the
Box Counting method (1)
-
Calculating the Fractal Dimension is time consuming.
If you don't need this characteristic, uncheck the option for faster
processing.
Illustration:
References:
1. Bourke, P., 1993. Fractal Dimension Calculator User Manual,
Online. Available: http://paulbourke.net/fractals/fracdim/
ToolBox
implementation
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Command line syntax
ET_GPPolylineCharacteristics
<input_dataset> {fractal_dimension} {precision}
Parameters
| Expression |
Explanation |
| <input_dataset> |
A
Point feature class or feature layer. |
| {fractal_dimension} |
A Boolean indicating whether to
calculate fractal dimension or not. |
| {precision} |
An
Integer between 0 and 8 representing the number of places after the decimal point
to be used. |
Scripting syntax
ET_GPPolylineCharacteristics (input_dataset, fractal_dimension,
precision)
See the explanations above:
<> - required parameter
{} - optional parameter
| Copyright © Ianko Tchoukanski |
