<div dir="ltr"><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)"><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px"><br></span></div>
<div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)"><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">It depends on how precise and how general you want to be. Crudely, you </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">
<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">can divide the distance in meters </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px"><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">by 1860*60 (1 minute (latitude on sphere) = 1 nautical ml = 1.86km). Not </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">
<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">going to be accurate in mid/high latitudes. Better is convert point to </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">
<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">meters, create another point maxDIS away in meters, convert that point </span><br style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">
<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">back to lat/long and then calculate maxDIS from pythag. </span><br></div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)">
<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px"><br></span></div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)"><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">Thanks for your reply.</span></div>
<div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)">Sorry For my dumbness.</div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)">
Yeah, I understand we can do some rough conversion here if precision is not an issue.</div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)"><br></div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)">
But about the solution you mentioned convert point to meters. Not sure how to do that, could you give me some hint?</div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)">
<br></div><div class="gmail_default" style="font-family:'comic sans ms',sans-serif;font-size:small;color:rgb(0,0,0)">Thanks : )</div></div><div class="gmail_extra"><br clear="all"><div>Sincerely Yours<div>Tingting Cao</div>
</div>
<br><br><div class="gmail_quote">On 6 January 2014 15:05, Phil Scadden [via OSGeo.org] <span dir="ltr"><<a href="/user/SendEmail.jtp?type=node&node=5096646&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>></span> wrote:<br>
<blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 6/01/2014 4:28 p.m., smilectt wrote:
<br>> Some other topics mentioned the geoserver does not support specify the
<br>> distanceUnits and in fact the maxDis is the degree distance to the center point.
<br>You got it. Actually, maxDis will be interpreted as being in the units
<br>of layers you are querying. If the native spatial reference is in
<br>degrees, then it will be interpreted as degrees.
<br>> I didn't quite get it, does the degree distance mean the longitude/latitude
<br>> degree differences with the point we are comparing?
<br>Yes.
<br>> but how can I fix it that I can filter them according to the value expressed
<br>> in meters (as it makes more sense)
<br>It depends on how precise and how general you want to be. Crudely, you
<br>can divide the distance in meters
<br>by 1860*60 (1 minute (latitude on sphere) = 1 nautical ml = 1.86km). Not
<br>going to be accurate in mid/high latitudes. Better is convert point to
<br>meters, create another point maxDIS away in meters, convert that point
<br>back to lat/long and then calculate maxDIS from pythag.
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