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<DIV dir=ltr align=left><SPAN class=843131215-25082009><FONT face=Arial
color=#0000ff size=2>Hi Hanno,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=843131215-25082009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=843131215-25082009><FONT face=Arial
color=#0000ff size=2>as a workaround you could load two layers with different
timestamps. One layer you set opacity to 0 and shows it not in the
layerswitcher. When you choose the next time, the tiles should be there and the
tiles for the next time are loaded invisible.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=843131215-25082009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=843131215-25082009><FONT face=Arial
color=#0000ff size=2>Arnd</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=de dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>Von:</B> users-bounces@openlayers.org
[mailto:users-bounces@openlayers.org] <B>Im Auftrag von </B>Rahn Hanno
(rahn)<BR><B>Gesendet:</B> Dienstag, 25. August 2009 15:39<BR><B>An:</B>
users@openlayers.org<BR><B>Betreff:</B> [OpenLayers-Users] preload
layers<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hello
list,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I have a little tricky question.
Perhaps somebody can help me.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I show a layer in my map. This layer
shows polygons at a specific time. Now you can click a button and the next time
will be shown in the map. You can change the time back of course,
too.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">In my solution there are timestamps
from the year 1980 up to 2009.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">This works fine, but I have a little
performance problem. It is not very fast to load the different layers. If the
layer is loaded, he is in the cache and load the next time faster. That’s
ok.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I think now, perhaps it is possible
to load the next timestamp-Layer in the browser cache while the user looks at
the active layer. If the user then clicked at the button, the layer must only
load out of the browser cache.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I don’t know if something like that
is possible or not. Perhaps somebody can help me or somebody has already realise
something like this.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">A lot of thanks to you for your
help.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Greetings<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hanno<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">------------------------------------------<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Hanno Rahn, Dipl.-Ing. (FH)
</SPAN></FONT><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Geoinformatik<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">ZHAW Zürcher Hochschule für
Angewandte Wissenschaften Umwelt und Natürliche Ressourcen
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Fachstelle Geoinformatik
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Grüental, Postfach CH-8820
Wädenswil <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Tel +41 (0)58 934
5592<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Fax +41 (0)58 934 5580
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">hanno.rahn@zhaw.ch
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
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