An auto-ranging density map renderer.
Tells renderer to re-render density map and recompute ranges. This should be called if the data changes or if, due to extent changes, the density changes.
Sets the bleed ratio, which is the sets the percentage of the margin around each tile to use in the tile's computation. Note: some bleed (i.e., greater than 1) is required since a heat map relies on adjacent data.
The desired bleed ratio.
Sets color ranges from cold to hot for the renderer.
Array of arrrays of numbers, each of the form [r,g,b,a], where each array represents a color and colors range from cold to hot. Note: Typically, a dozen colors is sufficient.
Sets filter radius corresponding to standard deviations. The filter radius is the cutoff point at which adjacent cells no longer contribute to a cell's calculation.
Number of standard deviations from the mean of a normal distribution to which to give positive weight.
Sets the number of rows and columns of cells to be used for computation within the grid.
Number of rows and columns used in the grid.
Sets the minimum required cell value for a cell to receive a color. Default minimum value is 0.
Sets an optional action to perform on each row. This enables processing the values on one or more columns for each row for use in the density map computations.