[Mapserver-users] Linear Referencing Support

Sun Jun 27 08:40:41 EDT 2004

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Hello all,
=20
  I=92m currently investigating the possibility of using UMN Mapserver =
in a
transportation/asset management environment.  While I have briefly =
tested
Mapserver, created some simple sites and read some of the documentation, =
I
have some questions that I hope someone here may be able to answer.
=20
1.	Does Mapserver support linear vector data with measure values (x,y,m
or x,y,z,m)?  More specifically, I have both Shapefiles and Oracle =
Spatial
tables that have measures =96 can Mapserver display them? =20
2.	If Mapserver can display linear features with measure values, can I
perform spatial queries against the data?  For example, if I click on a
point along a linear feature, is there a method by which I can query the
measure value that corresponded to the mouse click?
3.	Is there currently any support for dynamic segmentation?  In other
words, if I have either a point or line event table that is linearly
referenced against a spatial route layer, can Mapserver display these
events?
4.	Are there any developments currently underway by Mapserver
developers to build in sophisticated linear referencing support?  If =
not, is
this an area that is being looked at for future development?
=20
Finally, has anyone here been successful in using Mapserver for the =
purposes
of displaying linearly referenced data (either through native Mapserver
methods, or in an ad-hoc fashion)?  I would be extremely interested in
hearing from anyone who has had any sort of experience (good or bad) in =
this
field.=20
=20
Regards,
=20
Rafael Lucero

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=20

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<div class=3DSection1>

<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'>Hello =
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'><o:p>&nbsp;</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'>&nbsp; </span>I&#8217;m currently =
investigating the
possibility of using UMN <span class=3DSpellE>Mapserver</span> in a
transportation/asset management environment.<span
style=3D'mso-spacerun:yes'>&nbsp; </span>While I have briefly tested =
<span
class=3DSpellE>Mapserver</span>, created some simple sites and read some =
of the
documentation, I have some questions that I hope someone here may be =
able to
answer.<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'><o:p>&nbsp;</o:p></span=
></font></p>

<ol style=3D'margin-top:0cm' start=3D1 type=3D1>
 <li class=3DMsoNormal style=3D'mso-list:l0 level1 lfo1;tab-stops:list =
36.0pt'><font
     size=3D2 face=3DArial><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:
     Arial;mso-ansi-language:EN-US'>Does <span =
class=3DSpellE>Mapserver</span>
     support linear vector data with measure values (<span =
class=3DSpellE>x<span
     class=3DGramE>,y,m</span></span> or <span =
class=3DSpellE>x,y,z,m</span>)?<span
     style=3D'mso-spacerun:yes'>&nbsp; </span>More specifically, I have =
both <span
     class=3DSpellE>Shapefiles</span> and Oracle Spatial tables that =
have measures
     &#8211; can <span class=3DSpellE>Mapserver</span> display =
them?<span
     style=3D'mso-spacerun:yes'>&nbsp; =
</span><o:p></o:p></span></font></li>
 <li class=3DMsoNormal style=3D'mso-list:l0 level1 lfo1;tab-stops:list =
36.0pt'><font
     size=3D2 face=3DArial><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:
     Arial;mso-ansi-language:EN-US'>If <span =
class=3DSpellE>Mapserver</span> can
     display linear features with measure values, can I perform spatial =
queries
     against the data?<span style=3D'mso-spacerun:yes'>&nbsp; </span>For =
example,
     if I click on a point along a linear feature, is there a method by =
which I
     can query the measure value that corresponded to the mouse =
click?<o:p></o:p></span></font></li>
 <li class=3DMsoNormal style=3D'mso-list:l0 level1 lfo1;tab-stops:list =
36.0pt'><font
     size=3D2 face=3DArial><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:
     Arial;mso-ansi-language:EN-US'>Is there currently any support for =
dynamic
     segmentation?<span style=3D'mso-spacerun:yes'>&nbsp; </span>In =
other words,
     if I have either a point or line event table that is linearly =
referenced
     against a spatial route layer, can <span =
class=3DSpellE>Mapserver</span> display
     these events?<o:p></o:p></span></font></li>
 <li class=3DMsoNormal style=3D'mso-list:l0 level1 lfo1;tab-stops:list =
36.0pt'><font
     size=3D2 face=3DArial><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:
     Arial;mso-ansi-language:EN-US'>Are there any developments currently =
underway
     by <span class=3DSpellE>Mapserver</span> developers to build in =
sophisticated
     linear referencing support?<span style=3D'mso-spacerun:yes'>&nbsp; =
</span>If
     not, is this an area that is being looked at for future =
development?<o:p></o:p></span></font></li>
</ol>

<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'><o:p>&nbsp;</o:p></span=
></font></p>

Finally, has anyone =
here been
successful in using Mapserver for the =
purposes of displaying
linearly referenced data (either through native Mapserver
methods, or in an ad-hoc fashion)? &nbsp;I would be extremely interested =
in
hearing from anyone who has had any sort of experience (good or bad) in =
this
field. <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'><o:p>&nbsp;</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'>Regards,<o:p></o:p></sp=
an></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'><o:p>&nbsp;</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'>Rafael =
Lucero<o:p></o:p></span></font></p>

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