#mapnik log: Thursday 23, February 2012

2012 | 02

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00:45:10 <CIA-7> mapnik: Dane Springmeyer master * r56aeae1 / (2 files in 2 dirs): fix broken python linking after 6a0ce99e22f - http://git.io/Sn8uHA
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03:06:04 <pnorman> So, I'm using mapnik to generate a map on a cairo PDFSurface and it's working okay, except for two issues. The first is that the PDFs are massive and complex and take about half an hour to print one sheet on my printer. The second is that the text on roads has horrible kerning and appears to jump above and below the text line by a couple of points. I'm not sure how to fix these issues
03:09:34 <rcoup> pnorman: for problem 1, you could render to a high-res image and then print it
03:09:53 <rcoup> you lose the vector-ness, but if that's a problem then rasterizing is the way to solve it
03:10:29 <rcoup> for the 2nd: you have the same fonts on the machine you're viewing it with as the one producing it?
03:10:52 <pnorman> Good question - not sure. I'll check what I'm using, it's the osm.org stylesheet
03:19:28 <pnorman> Do you think it'd be better to use the cairo png or agg png renderer for putting it into a cairo pdfsurface? the Cairo Vs. AGG Comparison link on https://github.com/mapnik/mapnik/wiki/MapnikRenderers is dead
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06:21:11 <CIA-7> mapnik: Dane Springmeyer macbinary-tilemill * rb417a07 / (189 files in 30 dirs): Merge branch 'master' of github.com:mapnik/mapnik into macbinary-tilemill (+149 more commits...) - http://git.io/bi8naQ
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08:32:09 <pnorman> So, I'm looking at converting my python script that renders to a cairo PDFSurface to render to an image with AGG and then embed the image in the PDFSurface, but I'm not sure how to go about setting the resolution correctly
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10:24:22 <CIA-7> mapnik: Artem Pavlenko master * r00787ec / (2 files in 2 dirs):
10:24:23 <CIA-7> mapnik: + implement 'filter' iterator to output key/value pairs
10:24:23 <CIA-7> mapnik:  where value is not value_null().
10:24:23 <CIA-7> mapnik: + use it in json::feature_generator to have more compact json - http://git.io/qevAyg
10:24:23 <CIA-7> mapnik: Artem Pavlenko master * r9db9e7d / (3 files in 3 dirs): Merge remote-tracking branch 'origin/master' - http://git.io/wEMH7A
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12:11:39 <CIA-7> mapnik: Artem Pavlenko master * r61c6b7e / include/mapnik/hextree.hpp : + use boost::range algorithms for brevity - http://git.io/7ZYJPw
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12:27:13 <CIA-7> mapnik: Artem Pavlenko master * rabd57d2 / include/mapnik/hextree.hpp :
12:27:13 <CIA-7> mapnik: + use boost::scoped_ptr for auto memory managment
12:27:13 <CIA-7> mapnik: + remove delete/new from create_palette - http://git.io/XWO14g
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12:56:23 <HSylvio> plop
12:59:18 <HSylvio> :'-[
13:00:16 <HSylvio> p["type"]="postgis"; // anyone?
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14:27:53 <HSylvio> YOUHOU, MY PDF IS NOT A MONOCHROME ANYMORE!!!
14:32:41 <CIA-7> mapnik: Artem Pavlenko master * r8767ca8 / bindings/python/mapnik_image.cpp : + add set_pixel method - http://git.io/pLijZA
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17:10:54 <CIA-7> mapnik: Hermann Kraus master * re79f13d / include/mapnik/internal/dump_xml.hpp : Add debug helper for XML. - http://git.io/sMHZsw
17:10:54 <CIA-7> mapnik: Hermann Kraus master * r2955983 / src/load_map.cpp : Fix #1095. - http://git.io/DuReXw
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17:20:07 <springmeyer> herm: thanks for that fix
17:20:22 <springmeyer> definitely solved the problem as reported
17:20:29 <springmeyer> did you run the python tests however?
17:20:41 <herm> perfect
17:20:45 <herm> no
17:20:46 <springmeyer> I get:
17:20:47 <springmeyer> RuntimeError: Unknown symbolizer '<xmltext>' in style 'roads' in map '../data/good_maps/osm-styles.xml
17:21:04 <springmeyer> and a few others like it:
17:21:04 <springmeyer> RuntimeError: Unknown child node in 'Style'. Expected 'Rule' but got '<xmltext>' in style '1' in map '../data/good_maps/markers_symbolizer_points.xml'
17:21:27 <herm> looks like my code doesn't delete all empty text nodes.
17:22:58 <CIA-7> mapnik: Dane Springmeyer master * r2d1f2d1 / include/mapnik/shield_symbolizer.hpp : fix compile of shield_symbolizer.hpp on windows - http://git.io/ganU9Q
17:23:07 <herm> I'll check that later. Currently I have a bit of work to do
17:23:50 <springmeyer> okay, thanks
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17:50:14 <CIA-7> mapnik: Dane Springmeyer master * r524d6be / plugins/input/sqlite/sqlite_resultset.hpp : avoid implicit cast from sqlite_int64 to int - http://git.io/ZTcL8g
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18:35:23 <brooks-strava> anyone had problems using the nightly-build ppa packages in ubuntu 11.10? I'm getting _mapnik.so: undefined symbol: _ZN6mapnik4json17feature_generatorD1Ev
18:36:12 <brooks-strava> I'm just trying to 'import mapnik' in python
18:38:17 <iandees> brooks-strava: https://github.com/mapnik/mapnik-packaging/issues/39
18:38:44 <brooks-strava> looks similar, but that references a different symbol
18:39:27 <brooks-strava> hmm. maybe I'll go with a manual compile
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18:44:35 <brooks-strava> success! I added the nightly-2.0 ppa instead and that seems to work. So just trunk is broken.
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18:58:07 <javisantana> ey guys, how mapnik manages the inner polygons? tesselating them?
18:58:39 <javisantana> i mean, tesselating outer
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19:49:10 <CIA-7> mapnik: Dane Springmeyer master * r6db1ba1 / src/markers_placement.cpp : fix compile on windows by including round() from global.hpp - http://git.io/aZoCpg
19:49:10 <CIA-7> mapnik: Dane Springmeyer master * r02eb906 / include/mapnik/text_placements/base.hpp : fix linking with msvc by declaring text_placements - http://git.io/YZi2dw
19:49:10 <CIA-7> mapnik: Dane Springmeyer master * r84daf7a / plugins/input/sqlite/sqlite_resultset.hpp : Merge branch 'master' of https://github.com/mapnik/mapnik - http://git.io/d1RjJQ
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21:11:34 <CIA-7> mapnik: Dane Springmeyer master * r871650a / include/mapnik/util/conversions.hpp : specialize string2int conversion to avoid std::string ctor - http://git.io/cuZcrw
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21:54:15 <pnorman> I'm rendering a map to a mapnik.Image and seems to be taking excessively long. It's been at 100% CPU for a few minutes, and when I try to render the same mapnik.Map to a cairo.PDFSurface it finishes in seconds
21:57:06 <pnorman> mapnik.render_to_file finishes in seconds too
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22:03:43 <springmeyer> pnorman: hi
22:03:59 <springmeyer> that is odd
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22:04:29 <springmeyer> pnorman: can you describe you testcase a bit more? What size image, what format (png/jpeg), etc?
22:04:45 <springmeyer> also, what operating system?
22:05:40 <pnorman> I think I fixed it - might of been a scale_factor problem
22:07:34 <springmeyer> pnorman: scale_factor is buggy with cairo formats, beware
22:07:49 <springmeyer> but should work well for agg, though it should not hang
22:09:17 <pnorman> of course, now I need to figure out what the appropriate scale_factor is. I'm thinking it's ppi/90.7 with an image size of width*ppi/72 where width is in points and a map width of width*90.7/72
22:09:28 <pnorman> springmeyer: unless you feed it a scale_factor of 0
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22:12:24 <springmeyer> pnorman: you saying things hang if you do scale_factor=0 ?
22:12:36 <pnorman> springmeyer: I think that's what did it
22:12:53 <springmeyer> okay, can you confirm and then create an issue so I can fix?
22:13:15 <pnorman> confirmed with my script for mapnik.render(m,im,0.), I'll double-check with a less complex case
22:16:59 <pnorman> Confirmed it with the osm generate_image.py script. goes to 100% CPU, doesn't complete in any reasonable timescale, and have to kill -3 it
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22:38:01 <springmeyer> pnorman: what mapnik version, what image size, what operating system?
22:43:29 <pnorman> Python 2.7.2, version 200000 (built from source), ubuntu-server 11.10, mapnik.Image(5000,10000), although I've had the same problem on other image sizes
22:44:39 <springmeyer> okay
22:44:48 <springmeyer> is you mapnik.Map the same size?
22:45:20 <springmeyer> can you try attaching to a hung process with gdb?
22:45:25 <springmeyer> sudo apt-get install gdb
22:45:40 <springmeyer> sudo gdb --pid `pidof python`
22:45:51 <springmeyer> once in (gdb) interpreter
22:45:54 <springmeyer> ctrl-c
22:45:57 <springmeyer> then:
22:45:57 <springmeyer> bt
22:46:08 <springmeyer> should show backtrace of where the process is hung
22:47:59 <pnorman> installing
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22:49:37 <pnorman> Installed, 36 line backtrace
22:50:40 <pnorman> http://merry.paulnorman.ca:7201/mapnik/bt
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23:07:27 <springmeyer> pnorman: can you please type (if you are still in gdb)
23:07:37 <springmeyer> frame 1
23:08:32 <springmeyer> hmm, actually nevermind
23:08:39 <springmeyer> I can't guess the variable names
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23:09:04 <springmeyer> that backtrace shows agg is stuck. we likely just need to protect against a condition like this so it does not reach agg
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23:12:01 <springmeyer> pnorman: can you link to that bt when you create the issue?
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23:52:12 <CIA-7> mapnik: Dane Springmeyer master * re88b8c9 / include/mapnik/hextree.hpp : boost 1.42 compatibility - http://git.io/zDoeBA
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23:57:21 <pnorman> Where do I create an issue?
23:57:53 <pnorman> My guess for the fix would be throw some error if the scale is 0
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23:58:33 <CIA-7> mapnik: Dane Springmeyer 0.7.x * r6737bd9 / include/mapnik/hextree.hpp : backport hextree sorting fix to 0.7.x series - refs #1087 - http://git.io/8XrEXw
23:59:45 <springmeyer> pnorman: yes, that would be the fix
23:59:56 <springmeyer> issues are here: https://github.com/mapnik/mapnik/issues
23:59:59 <springmeyer> pnorman: ^^