Intermediate Algebra calculation in Survey123

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08-21-2019 02:03 PM
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New Contributor

Hi,

This is my first attempt at more complicated Survey123 calculations. The purpose is to automatically calculate timber volumes based on a few user entered values. The formula is simple, but there is a mistake somewhere in my syntax and I am missing where it is. My formula is as follows:

Gross Volume =

${log1_length_gross}*((pow((${log1_butt_diameter} div 100) div 2), 2)*pi())div 2) + ((pow((${log1_top_diameter_gross} div 100) div 2), 2)*pi())div 2))

In excel I normally express the formula as follows:

= ${log1_length_gross}*(((((${log1_butt_diameter}/100)/2)^2)*PI())/2)+(((((${log1_top_diameter_gross}/100)/2)^2)*PI())/2))

Thanks in advance.

Survey123 SurveySurvey123 Geonet

Survey123 for ArcGIS

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Frequent Contributor II

I think it is your pow().  You are ending the pow() before the ,2 part.

pow((${log1_butt_diameter} div 100) div 2), 2)

should be

pow((${log1_butt_diameter} div 100) div 2, 2)

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Frequent Contributor II

I think it is your pow().  You are ending the pow() before the ,2 part.

pow((${log1_butt_diameter} div 100) div 2), 2)

should be

pow((${log1_butt_diameter} div 100) div 2, 2)

View solution in original post

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New Contributor

Thanks for the help Doug that solved it.

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