Thank you for your comment. There are some issues that I need to explain and clarify 1. I did remove the sidewalk on the west side of barnes street not just because it didn't exist in the aerial image. And when I passed by bison dr Every day, I observed that there was indeed no sidewalk. After you raised objections, I went to barnes street specifically this morning to find out and discovered that it did exist. But it's hard to notice on the main road. This is my fault and I'm sorry. 2. I have changed some road surface materials. I have personally observed these materials or verified them through street views within a year. Some concrete materials and asphalt materials have similar colors after aging and are difficult to distinguish. There are a large number of incorrect labels throughout Winnipeg. But I can be sure that I know what I am doing. (bison dr, markham road, bike lane s) are made of asphalt, while barnes street and footways are made of concrete. 3. GPS tracks always have random errors due to technical reasons. However, by looking for the average value through a large number of my own tracks and the public tracks of osm, I think esri is extremely accurate with in city limit (not outside city), although it is rather old