Rounding start values

[jort-wolda]

Context

The new residences can result in long floats when you do not change the shares of residences built per construction type:

While the shares can only be set using 1 decimal, the starting values are the result of queries calculating the value based on the dataset. These starting values actually have many more decimals in the back-end.

When you round these starting values to 1 decimal you potentially get this error when you changed the inputs and want to reset to the starting values:

This is a rounding error and etengine can't balance the sliders to be 100% because they are all defined based on their start-value query.

A solution that works is rounding to 2 decimals. Adding up the values shown in the front end still results in 100.1% but the back-end value with slightly more precision makes it close enough to 100% for etengine to not result in an error. The extremely long floats are thereby reduced to a maximum of 4 decimals.

Implemented changes

Rounded the input values to 2 decimals for:

• households_share_of_apartments
• households_share_of_detached
• households_share_of_semi_detached
• households_share_of_terraced

Related

Checklist

• I have tested these changes
• I have updated documentation as needed
• I have tagged the relevant people for review