See, etc. how the land lies
Definition 1 of 1
Pro Tip 1/3Caution Implied
The phrase often suggests being careful and not rushing into action without understanding a situation. 
Let's see how the land lies before investing in new equipment.
Pro Tip 2/3Observation Needed
It implies taking time to observe and analyze the details or dynamics that could influence a decision or action. 
I will see how the land lies during the meeting and then decide my next move.
Pro Tip 3/3Metaphorical Use
It's a metaphorical phrase originating from assessing actual land but is used for various situations. 
Before launching the campaign, we need to see how the land lies with our audience.