I've already tried with that solution but the problem is how to know how
much buffer I need.
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
get my text correctly. But how can I know what my label text will be long?
Now I'm going in the direction of vector outputs hoping that they
support all my needs (symbols and labels).
Daniele
Il 30.11.2011 16:03, Adam Eskreis ha scritto:
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?
On Wed, Nov 30, 2011 at 3:06 AM, Daniele Debernardi <[email protected]
<mailto:[email protected]>> wrote:
Tiling the map is a good idea, but the problem is the symbology
and label that are drawn between 2 tiles,
with a buffer can't be possible why there is no possibility to
know how the symbol or text will be.
I'm trying to configure php mapscript to output directly in pdf
with CAIRO but with no success.
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
setting output format driver CAIRO/PDF mimetype application/x-pdf
imagemode RGB and extension pdf i get this error:
[MapServer Error]: msSaveRasterBuffer(): unsupported image format
Failed writing image to /tmp/4ed5e30c_4d9_0.pdf
In php i have the support of pdflib lite enabled (PDFlib GmbH
Version 7.0.5)
Is there something particular in the configuration that I'm
missing to get pdf output work correctly?
Thanks in advance
Daniele
Il 29.11.2011 19:00, Adam Eskreis ha scritto:
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.
-Adam
On Tue, Nov 29, 2011 at 10:51 AM, Stephen Woodbridge
<[email protected] <mailto:[email protected]>> wrote:
On 11/29/2011 10:02 AM, Daniele Debernardi wrote:
The solution is not pumping up the memory limit of the
server, because
if i get 2 request at the same time
I still have memory problem.
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.
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.
Which is the best way (output format) to generate high
resolution map
images with full symbology support?
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.
-Steve W
Il 29.11.2011 15:49, Stephen Woodbridge ha scritto:
On 11/29/2011 3:20 AM, Daniele Debernardi wrote:
Hi,
with mapserver trunk version (but i think with
others too) I have to
generate very big map to be imported in a pdf file.
I use php mapscript to generate maps with 300 dpi
for an A1/A0 pdf page
or bigger.
This mean that the map has dimensions like
15000x25000 pxl and when I
call the MapObj->draw method i get this error:
PHP Warning: mapObj::draw(): [MapServer Error]:
agg2CreateImage():
mapagg.cpp: 708: Out of memory allocating
1550851152 bytes.
Map server is configured with the AGG/PNG driver
with imagemode RGBA.
Is it normal that need so much memory to generate
the image?
Just for the image buffer you need 15000x25000x4
pixels = 1500,000,000
and AGG might actually allocate a slight larger image
buffer so it
does not create edge effects while antialiasing
objects close to the
edges. So the above request does not seem unreasonable.
I already tryied the php ini_set memory_limit but
with a limit of 2048M
i still have some problem with memory.
Try setting the limit a little higher like to
2564-3072M can see if
your memory problems go away. Of course this assumes
you have a system
with a lot of memory.
-Steve W
I checked other possible outputs but generating
maps in pdf through
Cairo driver but doc says that polygons filled
with symbols are not
supported, and for that reason I cant use it.
SVG output has some limitations too like line
drawn without symbols or
pixmap symbols not supported.
Is there a better way to generate so big map
images and imported in a
pdf file?
Hope you guys can help me.
Daniele
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