Simple Density Analysis

Instructions for use

Simple Density Analysis calculates the value per unit area within a specified neighborhood shape for each point. The Calculator Method is the measurement of a point divided by the area of the specified neighborhood. Where the neighborhood of a point is superimposed, its density values are also summed. The density of each output grid is the sum of all the neighborhood density values superimposed on the grid.

The unit of the Result Raster value is the reciprocal of the square of the original Dataset unit, that is, if the original Dataset unit is meter, the unit of the Result Raster value is per square meter.

Note: For GCSDataset, the Result Raster value is in units of "per square degree" and is moot.

Open the Shop Datasource under the "Exercise Data/RasterAnalysis" folder, where the distribution of members of a chain store in a certain place is Shop Point Dataset. We use this data as an example.

Function entrance

  • Spatial Analysis tab-> Raster Analysis group-> Density Analysis-> Simple Density Analysis.
  • Toolbox-> Raster Analysis-> Density Analysis-> Simple Density Analysis. (iDesktopX)

Parameter Description

  • Source Data
    • Datasource: Select the Datasource where the Dataset for Simple Density Analysis is located.
    • Dataset: Select the Dataset for Simple Density Analysis. The system automatically filters the Dataset under the selected Datasource and displays only the Point Dataset under the Datasource.
    • Density Field: Select the relevant field to be used for Simple Density Analysis, and filter the non-numeric field automatically. Therefore, before analysis, the selected Dataset must have relevant fields before analysis.
  • Analysis Bounds

    • Use to display and set the Kernel Density Analysis range. The default is Dataset Bounds.

  • Result Data
    • Datasource: Select the Datasource to save the Simple Density Analysis results.
    • Dataset: Enter the Dataset Name to save the Simple Density Analysis results. If the entered Dataset Name already exists, you will be prompted with Invalid dataset name and need to re-enter it.
    • Resolution: Enter the resolution of the Simple Density Analysis result, that is, the size of the ground area corresponding to a single pixel. The unit is consistent with the Dataset unit.
  • Shape Settings
    • Neighborhood shape: It is used to display and set the neighborhood shape of the point object for Density Analysis. Four shapes are provided: rectangle, circle, ring and sector. The parameters to be set are slightly different for different neighborhood shapes, as described below:
      • Rectangle: If the neighborhood shape is set as a rectangle, the width and height of the rectangle need to be set.
      • Circle: If the neighborhood shape is set as a circle, the radius of the circle needs to be set.
      • Ring: If the neighborhood shape is set as a ring, the ring inner diameter and ring outer diameter of the ring need to be set.
      • Sector: if the neighborhood shape is set as sector, the Start Angle, end angle and sector radius of the sector need to be set. The range of the Start Angle and end angle is 0, 360.
    • Unit type: Application provides two types: the number of rows and columns and GCS. The number of rows and columns is the grid pixel, and the default value is 3 pixels. GCS is consistent with the Dataset unit, and the default value is one twentieth of the side length of Dataset Bounds.

    The following figure shows the distribution of member promotion of a chain store:

    Figure: Simple Density Analysis Result

    From the Analyst Result, it can be seen that the members of the chain store are densely distributed in darker colors, while they are relatively sparse in lighter colors.