Re: [mkgmap-dev] Problem in splitter (Africa)

6 Jan 2015

      Hi Stephen,

yes, you should have received an answer a now.

Gerd

Date: Tue, 6 Jan 2015 19:15:51 +1000
From: steve.sgalowski@gmail.com
To: mkgmap-dev@lists.mkgmap.org.uk
Subject: Re: [mkgmap-dev] Problem in splitter (Africa)

gerd P 
did you get my direct e-mail to you sir 
stephen 

On Tue, Jan 6, 2015 at 10:18 AM, GerdP <gpetermann_muenchen@hotmail.com> wrote:
Hi Stephen,

the log shows no problems. Why do you think that max-nodes=400000 doesn't

work?

Do you see an error message in mkgmap?

If yes, please provide your style files so that I can reproduce the problem.

Maybe your style still adds one POI for each point of each highway?

Gerd

steve sgalowski wrote
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canada splitter log file
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as expected ,  looks like i was correct
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the size of the split has to be smaller
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stephen
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On Tue, Jan 6, 2015 at 7:25 AM, Carlos Dávila <
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cdavilam@
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wrote:
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Final file size depends on the amount of data in the input, not on the
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value of max-nodes. If you need a final img smaller than a given size you
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have to reduce the area covered by the input file or reduce the number of
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osm elements from the input that go into the map playing with your style
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files.
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El 05/01/15 a las 22:07, Steve Sgalowski escribió:
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gerd and carlos
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i am now running the splitter log file setup on my canada map
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and see what it does , the end result on this map = 6.8 gb img file
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wonder why some country can exceed and others not
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stephen
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On Tue, Jan 6, 2015 at 7:00 AM, Carlos Dávila <
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cdavilam@
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<mailto:
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cdavilam@
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wrote:
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Not sure what you mean. If you split a given country in a higher
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number of tiles (lower max-nodes) final size will be the same or
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slightly bigger, as there are more duplicated info due to overlap.
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Or you are loosing some information in the process to reduce final
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file size.
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El 05/01/15 a las 21:34, Steve Sgalowski escribió:
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in some of the countries i do , if i dont make the node count
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small , the map size exceedds , size limit of 3 gb
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then unshure how , canada has done this ok
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stephen
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On Tue, Jan 6, 2015 at 5:24 AM, Gerd Petermann
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<
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gpetermann_muenchen@
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<mailto:
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gpetermann_muenchen@
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<mailto:
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gpetermann_muenchen@
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<mailto:
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gpetermann_muenchen@
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wrote:
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Hi all,
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I wonder what splitter should do in this case:
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Stephen uses paramter --max-nodes=80000
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and splitter reports
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"Highest node count in a single grid element is 557,084"
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It is obvious that at least one tile will have much more
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than the
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requested 80.000 nodes,
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on the other hand, the file africa.osm.pbf contains large
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nearly
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empty areas,
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and that makes it very difficult to find a good split.
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The current version r416 fails because it doesn't accept
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tiles
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with less than 5% of
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the max-nodes value, so it searches for a solution where
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every
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tile has at least 4000 nodes,
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and that might not exist.
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I see these options:
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1) splitter can continue trying to split the data, accepting
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almost empty output files
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(e.g. some with < 5 nodes and very high aspect ratios like
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32)
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2) if that fails,  splitter can set the max-nodes value to
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557,084
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and try again
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3) or stop with an error message that tells the user that
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it is
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not possible
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to split with the used resolution
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4) or restart using a higher resolution  (15 would be
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required
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here instead of 13),
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@Stephen
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What reason do you have to use such a small max-nodes value?
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Would it be ok for you to use a higher one?
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Gerd
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splitter.log (356K)
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<http://gis.19327.n5.nabble.com/attachment/5829156/0/splitter.log>
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