Depends on what kind of mouse though. Woodmice are normally tolerated as they're quite cute and live mostly outdoors. But infestations of house mice are something that local authorities/pest control are regularly called out to deal with in the UK. If they can get in and get a toe-hold, especially where they've found a good food source, then they can run riot.
INDEX CONTOUR LINE A bolder/wider brown line that has the elevation value marked at various intervals as a part of the line. These contours typically occur every fifth line. Use an index contour near the point for which you are trying to find the elevation as a first step to determining the elevation of that point. Example of an index contour. This is the basic symbol that you will use to determine the elevation of a feature or location. It is a brown line on a topographic map and represents a line of equal elevation. All locations that a contour lines crosses have the same elevation at that point.
The elevation or differences in elevation on the surface is usually shown as contours. A contour line is a line that connects points of equal elevation. There is usually a contour interval set, say 1-foot for conventional survey.An aerial topo survey may have a contour interval of 2-foot to 5-foot typically.Again, these contours are a way to represent the relative elevations of the surface of the land. contour line is a line that connects points of equal elevation. There is usually a contour interval set, say 1-foot for conventional survey. An aerial topo survey may have a contour interval of 2-foot to 5-foot typically.