[Mapserver-users] Tolerance question ..

Sun Apr 18 20:30:01 PDT 2004

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  Hi all,
  I have two questions now...
  First one is about the tolerance I set on the map file. This tolerance
is like a radium around the user click? Like, if I set the tolerance to
5 pixels, it would be like if the user clicks on a point, I will query
everything in a 5 pixel radium, to all directions?
  Second one is about the querybypoint method. My first attempt to use
tolerance on my map was setting it on the querybypoint method, so I put
a 5 on the last parameter. But this tolerance was looking like if it was
like 5000000000 kilometers.. In every point of the map I clicked I would
query something, even if it was very far from my click. Then I tried to
put a -1 on the last parameter, and put tolerance 5 on my map file. It
worked fine. But now I'm curious why the 5 of the querybypoint is so
different from the 5 of the map file.
  Thanks,
     Murilo

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<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US =
style=3D'font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-US'><span
style=3D'mso-spacerun:yes'>  </span>Hi =
all,<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US =
style=3D'font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-US'><span
style=3D'mso-spacerun:yes'>  </span>I have two questions =
now...<o:p></o:p></span></font></p>

First one is about the =
tolerance I set
on the map file. This tolerance is like a =
radium
around the user click? Like, if I set the tolerance to 5 pixels, it =
would be
like if the user clicks on a point, I will query everything in a 5 pixel radium, to all =
directions?<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US =
style=3D'font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-US'><span
style=3D'mso-spacerun:yes'>  </span>Second one is about the <span
class=3DSpellE>querybypoint</span> method. My first attempt to use =
tolerance on
my map was setting it on the <span class=3DSpellE>querybypoint</span> =
method, so
I put a 5 on the last parameter. But this tolerance was looking like if =
it was
like 5000000000 kilometers…. In every point of the map I clicked I =
would
query something, even if it was very far from my click. Then I tried to =
put a
-1 on the last parameter, and put tolerance 5 on my map file. It worked =
fine.
But now I’m curious why the 5 of the <span =
class=3DSpellE>querybypoint</span>
is so different from the 5 of the map =
file…<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US =
style=3D'font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-US'><span
style=3D'mso-spacerun:yes'>  =
</span>Thanks,<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span lang=3DEN-US =
style=3D'font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-US'><span
style=3D'mso-spacerun:yes'>     =
</span>Murilo<o:p></o:p></span></font></p>

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