[mkgmap-dev] mkgmap r4025 implements --x-dem-poly option

Tue Jan 2 18:40:00 GMT 2018

--x-dem-poly option works like a charm, thanks!
I'm doing my tests with Bolivia map and there's some problem with 
overview map generation. Log file is recording a lot of lines like "file 
S19W069.hgt not found. Is expected to cover sea.", but the given hgt 
*does exist* in the hgt folder. "Missing" hgt's are different in 
different runs of mkgmap, see screenshots [1] and [2]. Watching at the 
overview map, it seems mkgmap starts building DEM correctly, but at a 
given point it fails to read hgt's and rest of DEM is not generated. DEM 
for tiles in the "missing" areas are correctly generated. BuildDEMFile 
creates correct overview, see [3].
[1] ||http://files.mkgmap.org.uk/download/381/Screenshot_20180102_181555.png
|[2] 
|||http://files.mkgmap.org.uk/download/380/Screenshot_20180102_185917.png
[3] 
|||||http://files.mkgmap.org.uk/download/382/Screenshot_20180102_192228.png|||

El 31/12/17 a las 11:53, Henning Scholland escribió:
> Hi Gerd,
>
> I got an OutOfMemory exception (see below) while reading zipped 1" SRTM
> files in Scandinavia. Unzipped it's all fine.
>
> Btw. it would be nice to move the 'DEM file calculation for ... took 265
> ms'-messages from stdout to logging Information.
>
> Henning
>
> Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
>      at java.nio.HeapByteBuffer.<init>(Unknown Source)
>      at java.nio.ByteBuffer.allocate(Unknown Source)
>      at
> uk.me.parabola.mkgmap.reader.hgt.HGTReader.extractFromZip(HGTReader.java:123)
>      at uk.me.parabola.mkgmap.reader.hgt.HGTReader.<init>(HGTReader.java:90)
>      at
> uk.me.parabola.mkgmap.reader.hgt.HGTConverter.<init>(HGTConverter.java:66)
>      at uk.me.parabola.imgfmt.app.dem.DEMFile.calc(DEMFile.java:47)
>      at uk.me.parabola.mkgmap.build.MapBuilder.makeMap(MapBuilder.java:334)
>      at
> uk.me.parabola.mkgmap.combiners.OverviewBuilder.writeOverviewMap(OverviewBuilder.java:191)
>      at
> uk.me.parabola.mkgmap.combiners.OverviewBuilder.onFinish(OverviewBuilder.java:103)
>      at uk.me.parabola.mkgmap.main.Main.endOptions(Main.java:617)
>      at
> uk.me.parabola.mkgmap.CommandArgsReader.readArgs(CommandArgsReader.java:128)
>      at uk.me.parabola.mkgmap.main.Main.mainStart(Main.java:136)
>      at uk.me.parabola.mkgmap.main.Main.main(Main.java:107)
>
> On 28.12.2017 18:18, Gerd Petermann wrote:
>> Hi all,
>>
>> see http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4025
>> this is useful if you create a map for a country extract like nepal (nepal-latest.osm.pbf)
>>
>> Here is a screenshot of a map created with the option --x-dem-poly=nepal.poly
>> http://files.mkgmap.org.uk/download/378/nepal-with-poly.jpg
>>
>> The screenshot also shows some wrong reliefs, and I think I used files without many holes :-(
>> So, next step is to find out what goes wrong with DEM in low resolutions. This might take longer,
>> I hope Frank has an idea.
>> It seems to be a good idea to use a rather high res for the overview map for now. For the screenshot I used
>> --x-overview-dem-dist=276160, with --x-overview-dem-dist=88000 the problems are gone and DEM file is still only
>> ~300KB.
>>
>> Gerd
>> P.S.
>> See also http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&path=%2F&rev=4024
>> I've moved some messages into the logger, so there will be less noise from mkgmap.
>>