The grids on the map when it is zoomed all the way out are 10km. They go to 1km and then 100m as you zoom in. They may go to 10m, but I'm not sure about that.
Originally posted by Zeus-cat: The grids on the map when it is zoomed all the way out are 10km. They go to 1km and then 100m as you zoom in. They may go to 10m, but I'm not sure about that.
On a couple of the really big maps zooming all the way out will change the grid to 100km. Fully zoomed in I've seen 10m grids quite a lot.
At any rate, you can always tell how big the grid is because every tenth grid line from the bottom or left edge of the map (that's the entire map, not the area currently displayed) has a distance marker in KM from the bottom left corner. The number is REALLY faint very pale grey and hard to spot, but it IS there.
An alternate way to get a distance between two points is to place an object at each point and save the file, then go to the mission file to get the map coordinates of each object. From there you can use Pythagorus' theorum to calculate the straight line distance.
My prefered method of distance-measuring is to set a fi-storch with two waypoints, airstart, speed set to 100km/h. stretch the two waypoints like a ruler between the spots being measured. Take the time needed to travel between each in minutes, and divide by 0.6 to find the distance in kilometers.
You can just take the coordinates in the .mis file. They are in meters. It's a simple calculation to get the distance between two points/objects. sqrt(dx*dx+dy*dy) [m]