Is that the only view you will be showing? If it is, there is no correct or incorrect placement. Use whichever allows the best dimensioning scheme to best describe the model.
Personally I would use the central location purely for aesthetic reasons. The off centre placement really messes with my OCD.
From my experience, it really depends on the purpose of the drawing. If the ISO view is the focus of the detailing, then it should be center. If it is for reference only, and other details need to dominate the drawing, then it should be off to the side. The only ASME standard that goes into detail about non-orthographic views is ASME Y14.41, which shows example of the ISO view actually being to the left a bit, centered within the squarish open space left of the title and rev blocks.
I agree with Kelvin and Matthew. If there will be other views, leave it in the corner. If it will be the only view on the sheet, move it to the center and make it much larger.
My opinion, and this is not based on any standard, is that ISO view should only be put if it add to the understanding of the drawing, or if you use it to dimension the part. I would not automatically put an ISO view just for aesthetic reason, or just because its easy.
For some parts with complicated geometry, this view does help indeed and in this cas, I have the tendancy to put it in the upper right corner, or simply where I have enough space.
Curious to have the opinion of others on this matter!
Anywhere it looks good, but NEVER in between projected views. ISO views are a bonus you get because you've made a solid model. Marketing people love them, manufacturing people would sooner have the extra space on the sheet for detailing.
We always put them in the upper right corner, and place a border around it, that attaches to the drawing sheet border.
Ever since we started 3D back in the day, we make it mandatory to put an iso in the upper right. You'd be surprised how many people it helps to understand the drawing. Manufacturing inlcuded.
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