<div dir="ltr">Ed,<div> Some initial thoughts; literally back of the envelope</div><div>- Constrain the problem by first realizing that all 'drive-able' 5-mile distances will occur.</div><div>- So, determine all road intersections within a 5-mile radius centered on a firestation</div>
<div>- Then use a program like 'pgRouting' (<a href="http://pgrouting.org/">http://pgrouting.org/</a>) to generate a list of the shortest distance from the firestation to each road intersection within your radius.</div>
<div>- Then order list of shortest distances.</div><div>- Label those intersections that are less than 5 miles (shortest distance from pgRouting) from your fire station with a green dot or symbol.</div><div>- All other intersections label with a red dot or symbol.</div>
<div>This is a rough, first draft and I would think it would give you a reasonable idea (at least to the nearest intersection from the station) of your 5-mile driving distance.</div><div><br></div><div>Regards,</div><div>
Dave</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Feb 28, 2014 at 11:55 AM, Ed Hawkins <span dir="ltr"><<a href="mailto:ehawkins@henco911.com" target="_blank">ehawkins@henco911.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="#0563C1" vlink="#954F72"><div><p class="MsoNormal">I have a shapefile of firestations and a shapefile of roads, I need to do an analysis and find the 5 mile “DRIVING DISTANCE”, not as the crow flies, point on the roads from each firestation. Are there any suggestions? Any help would be greatly appreciated.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><b><i><span style="font-family:"Brush Script MT";color:#1f4e79">Edwin L. Hawkins Jr.,</span></i></b><b><i><span style="font-family:"Freestyle Script";color:#1f4e79"> GISP<u></u><u></u></span></i></b></p>
<p class="MsoNormal">Henderson County E911<u></u><u></u></p><p class="MsoNormal">GIS Administrator<u></u><u></u></p><p class="MsoNormal">Phone <a href="tel:731.968.5911" value="+17319685911" target="_blank">731.968.5911</a><u></u><u></u></p>
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