The Google Maps has a measurement tool which is accessible when you right-click the map. This video is a simple experiment or test to check the accuracy of the Google measure tool over a short distance of about 250 feet.
I used a Sears Craftsman laser measure, but this Dewalt is even better with a range of about 330 feet.
https://amzn.to/2mtOsGM LASER MEASURE
https://amzn.to/2DOnTWt 100 foot measuring tape
In the video, I measured the width of a soccer field using a tape measure and a laser measure, and then I got the measurement using Google Measure and checked to see how close it was. The results are published in this video.