Create Density Map

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

• Select the "Create Density Map" tool from the XTools Pro Surface Tools menu.

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

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

• Select an appropriate population field.

• Select if you wish to use Kernel function.

• Specify neighborhood and its parameters.

• Specify cell size and area units.

• 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 Create Density Map options.