This is what you are doing. It doesn't make any sense to criticize people for doing what you do.

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Here's a better description of the "smart recording". It shows that some detail is lost (but it still isn't clear it would matter in this case).

https://support.garmin.com/en-US/?fa...T27Zr4hxZDvjv5

It looks like the sampling rate for an iPhone XS Max is every second. The track walking a 25 ft rectangle didn't look very good.

Walking a 157 ft rectangle in a parking lot at a slow speed. the iPhone gave 109 ft and 1030+ gave 102 ft.

The inaccuracy is due to location errors. Not sampling rate.

The rectangle might be a worse case than a turning circle. If the 3 cul-de-sacs were measured low by 50ft each, the total would be 150ft over 5280 feet (or 0.3%).