Density

 

 

Purpose

 

This tool is provided for creating density raster maps.

 

Description

 

The tool allows calculating density rasters for point and polyline features in a specified neighborhood. You can use the tool to calculate density for landmark points and lines, utility and transportation lines etc.

 

Usage

 

1. Select the "Density" tool from the XTools Pro Surface Tools menu.

1. Select the input layer containing points or polylines to calculates density for.

2. Specify the name and location of the output raster dataset.

3. Select an appropriate population field.

4. Select if you wish to use Kernel function.

5. Specify neighborhood and its parameters.

6. Specify cell size and area units.

7. Press Run to calculate density raster.

 

 

 

Kernel function.

Using kernel function is the default option. Being available for only Circle and Ellipse neighborhood types it allows using a kernel function to fit a smoothly tapered surface to each input feature.

 

Neighborhood types.

There are following neighborhood types available.

 

• Circle

- a circular neighborhood with the given radius.

• Ellipse

- an elliptical neighborhood with the specified major/minor radius and rotation angle.

• Annulus

- a torus (or donut) neighborhood defined by an inner radius and an outer radius.

• Rectangle

- a rectangular neighborhood with the given width and height.

• Wedge

- a wedge (pie) neighborhood. A wedge is specified by a start angle, an end angle, and a radius. The wedge extends counterclockwise from the starting angle to the ending angle. Angles are specified in arithmetic degrees (counterclockwise from the positive x-axis). Negative angles may be used.

 

Unlike the standard functionality for calculating density in ArcGIS this tool combines all Density options.

 

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