Combo Overlay

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A combo overlay, combining a Rainfall Overlay with two Average Overlays (NORMAL and SOCIAL), using only the highest values in the last time frame.

The combo overlay is a Grid Overlay which can combine up to three Grid Overlays with boolean operators and use these overlays as input arguments functions and operators. The list of available functions and operators is given in the chapter below. Combo overlays can also take other combo overlays as input. Another powerful combination is the use of combo overlays with Average Overlays (with or without an average distance).

Operators

In the table below are the operators displayed that are supported by the combo overlay. The term argument refers to a grid overlay configured as input, a numerical value or a global name.

Input overlays and timeframes

  • Up to three overlays can be configured as input for the combo overlay. They are referenced as A, B and C.
  • You can use Globals in a formula.

Timeframes

When an input Overlay has multiple Timeframes, additional syntax is available to specify the intended timeframes.

Syntax Meaning Example Effect
A The (last) value from Overlay A MUL(A, 10) Assuming:

Will show the height of the water at the end of the calculation in cm (rather than m).

A2 The third timeframe's value from Overlay A GT(A2, 38) Assuming:

Will indicate whether any given location is (1) or is not (0) hotter than 38 °C, on the third computed timeframe of the Heat Overlay.

A0:2 The values from the first through third timeframes from Overlay A, as a list of inputs AVG(A0:2) Assuming:

Will show the average of the computed temperatures of the first three timeframes of the Heat Overlay.

AT For each timeframe of the Combo Overlay, the value from that same timeframe from Overlay A, as individual inputs.

This will cause the Combo Overlay to have at least as many timeframes as Overlay A.

MUL(AT, 10) Assuming:

Will show the height of the water at each timeframe of the Water Overlay's calculations in cm (rather than m).

A Combo Overlay automatically computes the amount of timeframes it requires, based on whether (and which of) its input Overlays are references with a "T" syntax.

Examples

How-to's

Videos

Example of the Combo overlay in the Tygron Platform. (In dutch)
Testing a parametric design on environmental criteria in the Tygron Platform. (In dutch)