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'�-- Simple Rings <br /> Maps with distance rings(i.e., 1, 2,and 3-mile rings) are the simplest and most widely used <br /> method for defining a trade area. While they can be drawn from any point,the middle of a <br /> downtown is often the most appropriate point from which to create distance rings. See the <br /> following example map: <br /> Example Map Showing Simple Distance Rings <br /> Radius Analysis of Downtown Madison <br /> 1. t tai t _., : i l e.* ,111111.. mama oatoa <br /> N <br /> " L •',. yyam�!� <br /> �^' ` ` r 1 RL�RM{w� <br /> 1 <br /> j, _�...Jam.—_.- r:- � 01 a, i <br /> • .." l,City dYraM.. <br /> L. ...AR ,� • <br /> s <br /> liVpik '';*, . . <br /> v < <br /> ;?^ *ncwn .'t 'I..;'7 1 ° .- Cara.torc.....w Nww..ww.ro.. <br /> __ <br /> t -j'+ 1'4+4' �-1'. � <br /> This approach can work for a quick analysis or for communities that are located in fairly uniform <br /> geography. For example, if you are defining a trade area for a small community surrounded by <br /> similarly-sized communities that are all spaced 20 miles from one another,a simple ring of 10 <br /> miles may be a reasonable trade area for analysis. <br /> While rings are an easy method to use,they fail to recognize travel barriers, such as natural <br /> features (mountains, rivers, lakes, etc.)and man-made elements(road networks,etc.). <br /> Subsequently, rings are useful for only simple analysis. This weakness is demonstrated in the <br /> previous example map. <br /> 11 <br />