Digital maps on phones are a godsend for travelers. Last year we had special apps for following GPX tracks of our path. This year we just load the tracks into a google “my map” and it works great, easy to find bars, see what you are walking by, see how far you have to go, etc.
But we have noticed a number of glitches. Sometimes things are misplaced. Often they are directly north or west of where they should be by 50 feet to a mile or more. I know they record locations a latitude and longitude expressed to six decimal places, enough for an accuracy to a few feet. If the recorded position for a bar has an incorrect digit in one of the decimal positions of, say the longitude, it would be shown exactly west or east of its real position.
We have also noticed a strong filtering effect. Wynette and I see different things on our maps, often radically different.
And then there is its inscrutable algorithm for showing different things as you expand in and out. Some hotels show up at certain scales and not others. You have to scale in and out to see everything. This happens with place names also, especially the tiny villages we walk through.