No subject
Fri Feb 8 15:06:04 EST 2008
each LAYER object, then making a single request for the layer EVERYTHING =
would do just what it seems you are describing.
=20
- Ed
=20
Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA 01863
Phone: 978-251-4242, Fax: 978-251-1396
ed at topozone.com
=20
=20
=20
From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On =
Behalf Of Andre Lockhart
Sent: Wednesday, May 23, 2007 9:50 PM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: [UMN_MAPSERVER-USERS] Combining layers into fewer tiles to =
reduce the number of Apache GETs
=20
We have a MapServer application that uses ESRI shapefiles. There is a =
different shapefile for land, street, city name, railroads, parks, etc. =
MapServer creates and overlays tiles/layers for each and decorates them =
according to the mapfile.
=20
The problem is that it requires over 200 GETs on the web server to pull =
all these layers/tiles down to the client and render them.=20
=20
Since all these layers are static and never need to be toggled on/off, =
we would like to 'flatten' them into one layer. This would reduce the =
number of GETs by almost an order of magnitude.
=20
Does anyone know how to do this while keeping the 'decoration' (like =
colors, fonts, etc.) specified in the mapfile?
=20
Thanks!
=20
=20
=20
=20
<http://www.covaluate.com/>=20
Andr=E9 Lockhart, President
andre at CoValuate.com
510.333.7189
=20
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<div class=3DSection1>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'>Andr=E9 –<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'>Your description sounds a little odd.=A0 It is common for =
MapServer
applications to contain many dozens of shapefiles.=A0 There may be one =
shapefile
per layer, but many layers combined into a GROUP with that keyword.=A0 =
And a
given MapServer request can specify as many layers – in one GET =
request – as needed.<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'>From your description, simply adding a GROUP EVERYTHING (for
example) to each LAYER object, then making a single request for the =
layer
EVERYTHING would do just what it seems you are =
describing.<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=3DMsoListParagraph =
style=3D'margin-left:36.75pt;text-indent:-.25in;
mso-list:l0 level1 lfo1'><![if !supportLists]><span =
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font-family:"Verdana","sans-serif";color:navy'><span =
style=3D'mso-list:Ignore'>-<span
style=3D'font:7.0pt "Times New Roman"'> =
</span></span></span><![endif]><span
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Ed<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Ed McNierney<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>President and Chief Mapmaker<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>TopoZone.com / Maps a la carte, =
Inc.<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>73 Princeton Street, Suite 305<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>North Chelmsford, MA=A0 01863<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Phone: 978-251-4242, Fax: =
978-251-1396<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>ed at topozone.com</span><span =
style=3D'font-size:11.0pt;font-family:
"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=3DMsoListParagraph style=3D'margin-left:36.75pt'><span =
style=3D'font-size:
11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p=
></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt =
0in 0in 0in'>
<p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> UMN =
MapServer Users
List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] <b>On Behalf Of </b>Andre =
Lockhart<br>
<b>Sent:</b> Wednesday, May 23, 2007 9:50 PM<br>
<b>To:</b> MAPSERVER-USERS at LISTS.UMN.EDU<br>
<b>Subject:</b> [UMN_MAPSERVER-USERS] Combining layers into fewer tiles =
to
reduce the number of Apache GETs<o:p></o:p></span></p>
</div>
</div>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'>We have a MapServer application that uses ESRI shapefiles. =
There is
a different shapefile for land, street, city name, railroads, parks, =
etc.
MapServer creates and overlays tiles/layers for each and decorates them
according to the mapfile.<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'>The problem is that it requires over 200 GETs on the web =
server to
pull all these layers/tiles down to the client and render them. =
<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'>Since all these layers are static and never need to be =
toggled
on/off, we would like to ‘flatten’ them into one layer. This =
would reduce the
number of GETs by almost an order of magnitude.<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'>Does anyone know how to do this while keeping the =
‘decoration’
(like colors, fonts, etc.) specified in the =
mapfile?<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'>Thanks!<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=3DMsoNormal><span class=3DMsoHyperlink><span =
style=3D'color:navy;text-decoration:
none'><o:p> </o:p></span></span></p>
<p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style=3D'color:navy'><a href=3D"http://www.covaluate.com/"><span =
style=3D'color:navy;
text-decoration:none'><img border=3D0 width=3D166 height=3D40 =
id=3D"_x0000_i1025"
src=3D"cid:image001.jpg at 01C79D87.1ACCBE80"></span></a></span><o:p></o:p><=
/p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'> Andr=E9 =
Lockhart,
President<o:p></o:p></span></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'> <a
href=3D"mailto:andre at CoValuate.com">andre at CoValuate.com</a><o:p></o:p></s=
pan></p>
<p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'> =
510.333.7189<o:p></o:p></span></p>
<p class=3DMsoNormal><o:p> </o:p></p>
</div>
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