# Contour¶

Contour plots are a way to show a three-dimensional surface on a two-dimensional plane.

## Set up¶

1. Add a data source.

2. Define the X- and Y-Axis to plot.

3. Shading is defined by the Z-axis and the color gradient. Use the Tick interval to set the gap in the number of display labels for the z-axis.

## Basics¶

Data Source
Data sources
Show Scale Bar
Display scale for the response (contour) variable, Z-axis.
Type

Select between contour or heatmap

## X-, Y- and Z-Axis¶

Column
Select data column from Data Source.
Type
Select axis type: linear, category or date; category and date are only available for heatmap Type contour charts.
Use Range
Min
Max
Set axis range values, axis will default to data range if not set.

Z-axis

Determines the line interpolation and contour colors as defined by range Min and Max, or default data minimum and maximum.

### Title¶

Label
Label Size
Give axis a name and set the font size.

## Layout¶

Background
Set color background of chart
Top
Bottom
Left
Right
Set chart margins (pixels)
Pad
Set central chart image padding (pixels)

## Contour Palette¶

Sets the number of colors used in the range; range values will be spread evenly across the number of defined colors.

Show Annotation
Adds overlay of contour values
Tick Interval
Define tick label frequency on gradient bar.

## Tooltip¶

Show Tooltip
Default to display of x-, y- and z-axis (shade) values; defined in Custom Tooltip.
Custom Tooltip
Create a custom tooltip; default sample tooltip used by Show Tooltip.

## Image¶

Source
Replace map with an image sourced from an URL. Can be a view state parameter

## Style, Margins, Format¶

Line Smoothing
Determines line smoothing; a value of zero reflects no smoothing, 100 is maximum smoothing.

Style for common settings