#mapnik log: Friday 26, March 2010

2010 | 03

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06:12:37 <c_lopez> good evening!
06:13:01 <c_lopez> has anyone had problems running the script of ticket #343?
06:13:02 <nikq> Ticket #343: Add a resolution parameter to Map object, http://trac.mapnik.org/ticket/343
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10:54:49 <josias> hi i have some problems with osm2pgsql after some points (~1700) e terminates with this error: "Error allocating nodes Error occurred, cleaning up" does some body know what that means?
10:57:29 <artem> josias: it means you don't have enough ram to run osm2pgsql in "non-slim" mode, consult  osm2pgsql -h on how to run in slim mode
11:01:19 <josias> thanks
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11:55:53 <josias> i've found no 'slim-mode'. i tried --slim.. but it doesn't work and the readme file contains no 'slim'
12:02:21 <rweait> josias: --slim works.  are you make-ing osm2pgsql from svn ?
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15:43:56 <josias> rweait: thanks that was the solution
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17:19:27 <hesco> I am brand new to mapnik.  I am adapting from some sample code I have which draws a county map.  I want to focus on only one city in that county and am guessing that this line: bbox=(Envelope( -22013.864146132022, 6719120.534380134, -17121.894335880875, 6724012.504190385)) defines the edges of the map.  What is the unit of measure used and how do I translate from longitude/latitude to that one?
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18:56:11 <rweait> hesco:  I think that depends on which projection you wish to convert to/from
18:56:21 <rweait> Have  a look at http://wiki.openstreetmap.org/wiki/Mercator
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23:00:43 <hesco> ain't seen formulas like that since I was in school.
23:19:32 <hesco> well, I tried that (the bash / bc one, at least) and it is not producing results in the anticipated format.
23:20:02 <hesco> I'm adapting from:  bbox=(Envelope( -22013.864146132022, 6719120.534380134, -17121.894335880875, 6724012.504190385))
23:20:39 <hesco> This tool is getting me: a map size, tiel_x and tile_y
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23:35:12 <jburgess> hesco: if you want an answer using python see: http://pastebin.ca/1853501
23:36:15 <jburgess> that is assuming you are using 900913 for that envelope
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