[GH85Carrera]

Yea, I will not drive my 911 now in below 32 degree temps. The summer tires are just not happy in low temps. That is why they are called summer tires.

The Corvette owners got a letter from Chevy to not even move the car in below freezing weather if they had the Michelin Super Sports. The tire can crack. I don't have those tires.

Back to picking ground control points. It is lots of fun. On some projects they decide after we fly it that they want more accurate maps tied to the earth. If it is before we fly we hire a surveyor to lay down targets, usually a big white X on the ground. Cows love to eat them and home owners get all bent out of shape for some reason. In some areas it is easier to pick objects on the ground and have the GPS coordinates of that spot read. So the center of a manhole, The end of a concrete sidewalk or where it meets asphalt. Just something we can see from the aerial photo.
One one project we have a bunch of photo points that are all just objects like that. So first we generate the first step, go back and read in the targets. Of course the airplane might be flying north to south or south to north. So the image I see might be right side up, rotated 180 degrees or 90 degrees sideways. That makes it extra fun to find. The software then uses the point I pick and it know I told the software that point is X,Y,Z and a surveyor says that is +- a couple of millimeters maximum. The software will pin that point to the earth and all the points we use. The entire image is then very precise. But it is a no fun to do. Ah well, that is why it is called a job.