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<DIV><FONT face=Arial size=2>Ken-Ichi,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>It sounds a little bit like the problem I seem to
have with rasters; only happening every so many times, especially when there is
more image in view. I have it with ECW's and TIFF (45MB RGB). My map image
fails, and the session seems to hang, because I can't submit the page, but I
seem to be able to open a new session in another window without much delay. I
tried changing my settings in php.ini, but it had no effect. I have 'patched' my
problem by placing the OnError tag in the mapDHTMLwidget image, invoking a
function when it fails, which re-loads the map image after a small delay. My
diagnosis so far is that something gets ahead of itself, serving the source to
the client browser, and the client browser requesting the image, before the
image has begun being rendered. You will find that the URL of your mapimage is
valid.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>I think it happens with PHP because it's slower
than, for example, mapserver. What is the size of your map image. Is it larger
than average, by any chance?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Jacob</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>-----Original Message-----<BR>From: <A
href="mailto:chameleon-bounces@lists.maptools.org">chameleon-bounces@lists.maptools.org</A>
[mailto:chameleon-bounces@lists.maptools.org] On Behalf Of Ken-ichi<BR>Sent: 25
August 2004 04:07<BR>To: <A
href="mailto:Chameleon@lists.maptools.org">Chameleon@lists.maptools.org</A><BR>Subject:
Re: [Chameleon] raster hang</FONT></DIV>
<DIV> </DIV><FONT face=Arial size=2>
<DIV><BR>I should also mention that this problem is probably TIFF
specific. It <BR>does not occur when I use an Erdas Imagine (.img) format
image of the <BR>same area, which is also about the same file size.</DIV>
<DIV> </DIV>
<DIV>-Ken-ichi</DIV>
<DIV> </DIV>
<DIV>Ken-ichi wrote:</DIV>
<DIV> </DIV>
<DIV>> Thanks for responding, Paul. I've actually set my php.ini file
to be <BR>> very lenient on resource use for other purposes, so I doubt it's
that:<BR>><BR>> max_execution_time = 60<BR>> max_input_time =
120<BR>> memory_limit = 510M<BR>><BR>> I did a little more testing and
found that this also happens with <BR>> non-Chameleon phpMapScript (the
MapLab non-ROSA preview app), and with <BR>> other GeoTIFFs, but not with the
mapserv CGI or the ROSA applet. So <BR>> I'm guessing you were right to
suspect the PHP side of things. Any <BR>> more ideas, or should I take
this to a more MapScript specific list?<BR>><BR>>
-Ken-ichi<BR>><BR>> Ken-ichi wrote:<BR>><BR>>> Hi folks.
I've started trying to add a GeoTIFF to my Chameleon app, <BR>>> and it
really bogs it down, sometimes to a stand still. The image <BR>>>
I'm experimenting with is a 29mb unsigned 8bit GeoTIFF created in <BR>>>
Erdas. The hangs are most frequent when the tiff occupies the whole
<BR>>> map, and when I say hang, I mean that the map just doesn't
render. <BR>>> The hangs also seem to generate an httpd process that
takes up a lot <BR>>> (>20%) of my CPU activity. The relevant
portion of my map file is <BR>>> pretty simple:<BR>>><BR>>>
LAYER<BR>>> NAME "Test
Raster"<BR>>> TYPE RASTER<BR>>>
DATA "/path/to/data.tif"<BR>>> STATUS
DEFAULT<BR>>> END<BR>>><BR>>> I haven't specified an
outputformat, except in the MAP section, where <BR>>> I've set it to PNG
(but I've switched around and that doesn't seem to <BR>>> make much
difference). This problem does not seem to occur outside <BR>>> of
Chameleon (everything works fine in MapLab's ROSA applet), and it <BR>>>
doesn't happen every time the map is loaded (although it inevitably
<BR>>> happens if you refresh the map enough).<BR>>><BR>>> Has
anyone experienced this kind of behavior before? Even better, <BR>>>
anyone have any recommendations?<BR>>><BR>>>
-Ken-ichi<BR>>><BR>>><BR>>>
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