---
title: "One-phase sampling option in Calc"
url: "https://openforis.support/questions/185/one-phase-sampling-option-in-calc"
tags: ["calc"]
status: "answered"
score: 0
answer_count: 1
asked: "2015-02-13T10:03:28"
last_activity: "2015-02-13T16:52:13"
source: "Open Foris Support - Q&A Forum"
license: "Copyright Open Foris, 2026. Some rights reserved under creative commons license."
---

# One-phase sampling option in Calc

Asked by PekkaH on 2015-02-13

Hi, this is related to question "Aggregation levels on calc".
I have simple design; one-phase sampling. I need to connect "Areas of interest table" and "Sampling unit table", like is said in "Open Foris Calc" manual on page 17. If I skip options "2-phase" and "Stratified" in settings, I can't introduce or import "Sampling unit table" into Calc?

Cheers,
Pekka


## Answer (score 0, by Mino Togna on 2015-02-13)

Link: https://openforis.support/questions/185/one-phase-sampling-option-in-calc/187

Hi Pekka,

the sampling unit table comes from the observations. 
That means, your sampling unit table comes from the data imported from collect. Probably plot or stand entity?

Thank you.
Mino