You can find instructions for accessing settings for Need4Viz graphics: Format Custom Element.
For the Google Maps Heatmap, the available parameters are :
Extended parameters
Global → See the user guide for the “Global” section
here
Options
Zoom : This setting allows you to set the minimum number of points from which the automatic zoom is active. Under this min number of points, an initial zoom factor can be set. The zoom control and full screen buttons can be hidden here. Min and max zoom values can also be positioned.
Unit system : You can set the unit system for the distances (kilometers/miles)
Map Type : This setting allows you to define the default map type. The map type control buttons can be hidden here.
Marker : This setting allows you to define if markers can be added by drawing
Streetview : This setting allows you to hide the Streetview button.
Markers
Clustering : This setting allows you to use or not markers clustering
Google Markers : This setting allows you to hide or not Google default markers
Heatmap makers : This setting allows you to set or not the size of the Heatmap markers as well as their maximum intensity values. this setting also allows you to define the interference radius of a heatmap marker as well as its maximum intensity value.
Drawing
Drawings : This setting allows you to use or not drawing module
Marker : This setting allows you to define if markers can be added by drawing
Circle : This setting allows you to define if circles can be added by drawing, and their color
Polygons : This setting allows you to define if polygons can be added by drawing, and their color. Polygons can be used to make a multi selection of markers (inside the polygon). You can define here if this functionality is wanted, and the name of the input control affected by this selection (a multi value input control has to be set before using this feature).
Polylines : This setting allows you to define if polylines can be added by drawing, and their color
Rectangles : This setting allows you to define if rectangles can be added by drawing, and their color
Export Server → See the user guide for the “Export Server” section here
Export FTP → See the user guide for the “Export FTP” section here
Export SharePoint → See the user guide for the “Export SharePoint” section here