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

7 Jan 2015


      gerd p

love the new splitter 417

it works great , now it advises when the max node count is to small for
splitting and recommend a higher node count

just tried this on the africa map split ,
and told me node count should be like 600,000 gerd p

stephen


On Thu, Jan 8, 2015 at 2:04 AM, GerdP <gpetermann_muenchen@hotmail.com>
wrote:
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Hi all,
I've committed r417 to fix a few rare problems in splitter:
1) The initial problem reported by Stephen:
splitter printed "Warning: No solution found for partition ..." but did not
stop when at least one partition was ok.
2) It tries a bit harder to find a solution when it turns out
that no good solution is found.
3) It prints a warning when the user choses a rather bad combination
of --max-nodes and --resolution.
I've also removed the code that optimized parts of a solution,
it did not really work in most cases. I'll try to find a solution for that
again
later.
Gerd
GerdP wrote
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Hi Steve,
I suggest to look at the rules in the default style and the style
manual:
http://www.mkgmap.org.uk/doc/pdf/style-manual.pdf
I am not that familiar with style rules, and I prefer java coding.
Gerd
Date: Wed, 7 Jan 2015 17:15:59 +1000
From:
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steve.sgalowski@
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To:
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mkgmap-dev@.org
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Subject: Re: [mkgmap-dev] Problem in splitter (Africa)
gerd p would love more on the routing mate in my map but when i tried
before to upgrade the script file , it did not work may be i send the
script file i use ,  so you can help me convert it over to the new
scripting you do mate
or provide me with plenty of examples and i can try gerd
stephen
On Wed, Jan 7, 2015 at 5:11 PM, Gerd Petermann <
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gpetermann_muenchen@
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wrote:
Hi Stephen,
okay, I forgot to ask you about other details:
1) You use options like --process-exits and other used for routing, but
your
style doesn't set any of the access attributes like mkgmap:car,
mkgmap:foot etc
which are needed to get proper routing info in the map.
I guess you don't care about routing?
2) Your cmd file contains the option --pois-to-areas-placement=tagelist
I think this is a very old typo which overrides a good default:
pois-to-areas-placement=entrance=main;entrance=yes;building=entrance
Please check the docu about the meaning:
http://www.mkgmap.org.uk/doc/options
Gerd
Date: Wed, 7 Jan 2015 16:57:41 +1000
From:
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steve.sgalowski@
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To:
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mkgmap-dev@.org
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Subject: Re: [mkgmap-dev] Problem in splitter (Africa)
gerd , have tried some of your ideas no not all worked for me however
have
worked out and are combining my poi strings am re checking now with the
new poi test file you have just uploaded to mkgmap server
stephen
On Tue, Jan 6, 2015 at 7:54 PM, Gerd Petermann <
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gpetermann_muenchen@
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wrote:
Hi Stephen,
yes, you should have received an answer a now.
Gerd
Date: Tue, 6 Jan 2015 19:15:51 +1000
From:
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steve.sgalowski@
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To:
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mkgmap-dev@.org
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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 <
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gpetermann_muenchen@
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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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