If you have a piece of text with a buffer that spans 10 tiles, and assuming you are using 2048x2048 tiles to do your tiling, I wonder what kind of text this is that can literally span 20000 pixels, and whether displaying that text on the map, rather than just overlaying that text on the map post-render, is the right call. <br>
<br>Anyway, best of luck.<br><br>-Adam<br><div class="gmail_quote">On Wed, Nov 30, 2011 at 10:22 AM, Daniele Debernardi <span dir="ltr"><<a href="mailto:daniele@geosar.ch">daniele@geosar.ch</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div bgcolor="#FFFFFF" text="#000000">
I've already tried with that solution but the problem is how to know
how much buffer I need.<br>
Suppose that i have a very long label that cover 10 tiles, I have to
generate tiles with a buffer of the size of 10 tiles to <br>
get my text correctly. But how can I know what my label text will be
long?<br>
Now I'm going in the direction of vector outputs hoping that they
support all my needs (symbols and labels).<br>
<br>
Daniele<br>
<br>
Il 30.11.2011 16:03, Adam Eskreis ha scritto:
<div><div class="h5"><blockquote type="cite">You can still buffer even if you draw in a tile based
manner. Suppose your buffer is 100 pixels and tile size is
256x256. Just pull 100 pixels more in each direction than you
need, and then when you weave your tiles together, only draw from
100,100 to 356,356 and cut out the rest. See what I mean?<br>
<br>
<br>
<div class="gmail_quote">On Wed, Nov 30, 2011 at 3:06 AM, Daniele
Debernardi <span dir="ltr"><<a href="mailto:daniele@geosar.ch" target="_blank">daniele@geosar.ch</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Tiling the map is a
good idea, but the problem is the symbology and label that
are drawn between 2 tiles,<br>
with a buffer can't be possible why there is no possibility
to know how the symbol or text will be.<br>
<br>
I'm trying to configure php mapscript to output directly in
pdf with CAIRO but with no success.<br>
<br>
MapServer version 6.1-dev OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG
SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=CAIRO SUPPORTS=FREETYPE
SUPPORTS=ICONV SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT
SUPPORTS=WFS_CLIENT SUPPORTS=GEOS INPUT=POSTGIS INPUT=OGR
INPUT=GDAL INPUT=SHAPEFILE <br>
<br>
setting output format driver CAIRO/PDF mimetype
application/x-pdf imagemode RGB and extension pdf i get this
error:<br>
<br>
[MapServer Error]: msSaveRasterBuffer(): unsupported image
format<br>
<br>
Failed writing image to /tmp/4ed5e30c_4d9_0.pdf<br>
<br>
In php i have the support of pdflib lite enabled (PDFlib
GmbH Version 7.0.5)<br>
<br>
Is there something particular in the configuration that I'm
missing to get pdf output work correctly?<br>
<br>
Thanks in advance<br>
<br>
Daniele<br>
<br>
<br>
<br>
Il 29.11.2011 19:00, Adam Eskreis ha scritto:
<div>
<div>
<blockquote type="cite">Why don't you try requesting the
images in a tile-based manner so that the requests are
managable, and then weave them together in your
software? Mapserver isn't intended to pull in tiles
that big. You should be able to pull in 2048x2048
tiles just fine.<br>
<br>
-Adam<br>
<br>
<div class="gmail_quote">On Tue, Nov 29, 2011 at 10:51
AM, Stephen Woodbridge <span dir="ltr"><<a href="mailto:woodbri@swoodbridge.com" target="_blank">woodbri@swoodbridge.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>On 11/29/2011 10:02 AM, Daniele Debernardi
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> The solution is not
pumping up the memory limit of the server,
because<br>
if i get 2 request at the same time<br>
I still have memory problem.<br>
</blockquote>
<br>
</div>
It sounds like you have not adequately sized the
server for the tasks you are asking it to perform.
Mapserver is designed for performance so that it
can handle requests quickly and free up the memory
it is using for the next request. If you start
swapping or paging data to disk that slows down
all processes and can overwhelm the system with
too many slow requests that are all consuming
memory and not exiting as fast as new requests are
coming in.<br>
<br>
If you are making an enhancement request for say
making mapserver use less memory and temporary
disk files or swap space at the cost of
performance, then you should add a ticket to the
tracking system. This is not a short term
solution.
<div> <br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Which is the best way
(output format) to generate high resolution
map<br>
images with full symbology support?<br>
</blockquote>
<br>
</div>
I defer to Thomas on this one. But he has already
mentioned that probably doing something like
direct pdf output and converting any pixmap
symbols into scalable symbols is the best way to
go.<br>
<br>
-Steve W
<div>
<div><br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Il 29.11.2011
15:49, Stephen Woodbridge ha scritto:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> On
11/29/2011 3:20 AM, Daniele Debernardi
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hi,<br>
with mapserver trunk version (but i
think with others too) I have to<br>
generate very big map to be imported in
a pdf file.<br>
I use php mapscript to generate maps
with 300 dpi for an A1/A0 pdf page<br>
or bigger.<br>
This mean that the map has dimensions
like 15000x25000 pxl and when I<br>
call the MapObj->draw method i get
this error:<br>
<br>
PHP Warning: mapObj::draw(): [MapServer
Error]: agg2CreateImage():<br>
mapagg.cpp: 708: Out of memory
allocating 1550851152 bytes.<br>
<br>
Map server is configured with the
AGG/PNG driver with imagemode RGBA.<br>
<br>
Is it normal that need so much memory to
generate the image?<br>
</blockquote>
<br>
Just for the image buffer you need
15000x25000x4 pixels = 1500,000,000<br>
and AGG might actually allocate a slight
larger image buffer so it<br>
does not create edge effects while
antialiasing objects close to the<br>
edges. So the above request does not seem
unreasonable.<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> I already
tryied the php ini_set memory_limit but
with a limit of 2048M<br>
i still have some problem with memory.<br>
</blockquote>
<br>
Try setting the limit a little higher like
to 2564-3072M can see if<br>
your memory problems go away. Of course
this assumes you have a system<br>
with a lot of memory.<br>
<br>
-Steve W<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> I checked
other possible outputs but generating
maps in pdf through<br>
Cairo driver but doc says that polygons
filled with symbols are not<br>
supported, and for that reason I cant
use it.<br>
SVG output has some limitations too like
line drawn without symbols or<br>
pixmap symbols not supported.<br>
<br>
Is there a better way to generate so big
map images and imported in a<br>
pdf file?<br>
<br>
Hope you guys can help me.<br>
<br>
Daniele<br>
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