Displaying map question, not a true square?

Hi,

i selected an area in london to be displayed on my application and noticed that the .shp image was not a total square/rantangle because there were lines sticking out in different directions and there was not cut of point. Is there a reason for this? because when selecting the area to use, using the cross hair, you drag a square/rangtangular shape to use so i assumed it would have the same shape that would appear on my app.

Cheers

If the area you select includes a way that extends outside your selection, it will include the entire way.