7. A map image rendering system of claim 5 , wherein the one or more applications includes one or more image shaders that form a text box for each of the plurality of line segments by forming each of the text boxes oriented along a length of an associated one of the line segments and having a length, in the direction of the length of the associated line segment, larger than the range of the associated line segment.
7. A map image rendering system of claim 5 , wherein the one or more applications includes one or more image shaders that form a text box for each of the plurality of line segments by forming each of the text boxes oriented along a length of an associated one of the line segments and having a length, in the direction of the length of the associated line segment, larger than the range of the associated line segment. 8. A map image rendering system of claim 7 , wherein the one or more image shaders form a text box for each of the plurality of line segments so that the start of each text box extends a predetermined distance, in the direction of the length of the associated line segment, before the start of the line segment and so that the end of the text box extends the predetermined distance, in the direction of the line segment, past the end of the line segment.