Messages

@menion
Hi,

Have you changed something in the mapsforge implementation?
Are you still on 0.3.0 or do you use the 0.3.1?

Chris,
may you please have a look to the Italy map? There is a coast line problem in the north of Sardegna.
You can find it close to Porto Pozzo.

Hi Jusc,

The repaired map of Italy is online  8-)

Chris,
may you please have a look to the Italy map? There is a coast line problem in the north of Sardegna.
You can find it close to Porto Pozzo.

Hello Jusc,

Yes I know, this is probably a problem with a coastline which is tagged with nodes sitting on each other too close.
OR someone have sunk this polygon by wrong tagging like the Northcape Island.

Anyway, usualy I solve these problems (there are numerous) by merging a handmade korr.osm on top of the dataset.

EDIT: Found it, 3 wrong nodes causing a self-intersecting poly - I edited this at OSM, should be OK with the next
update of the land_polygons.
I hope I have cought all erratic nodes...

aaaa Christian ... help me out please....

was there any notable change in new osmosis 0.41

Hi,

Can't see anything enlighting in the error-log, sorry  :oops:

I'm still on osmosis 0.40.1 and Mapsforge-map-writer-0.3.0 official release.
Anyway, thanks for reporting this issue!

Thank you for including US regions, but I have a question.  I see a terrain contour line or two..  Maybe every 100 meters?

Hi,

Please could you provide a osm-permalink for the region in question so that I can check it?

The interval of the contourlines is 20m.
However, the base dataset is from Nasa and is unfortunately unreliable.
This is the reason why there was no update of the USA-Maps since first upload.

The whole USA-Maps will be completely rerendered once Jonathan de Ferranti will have finished
the rework of the elevation data on his website http://www.viewfinderpanoramas.org.
I'm looking forward to create a mapset for alaska too.

btw: i assume that the problem with rendering of water/sea areas is not solved yet by mapsforge directly... right ?

Right

I read the workaroud thread on mapsforge forum.... but my brain lacks mental capacity to implement the changes at this moment ;-)

   
Well, its hard to believe that this is the reason...
 

Seriously, its a complex task and it adds tonns of data-overhead - you wont be able to keep the coverage for those big maps
you provide for the community.
I had to plitt some maps like norway, otherwise the overhead (these are all polygons) results in silly rendertimes and
sometimes crashes the phone.

You will have to implement scripting that only keeps land/sea-data for regions where it is really needed.
However for maps like spain you have to render the whole land...

any hints for improvements are welcome.

Hi jurajs,

There are only minor additions you may want to take a look at:

Some harbours are tagged this way (eg Aberdeen):
   <osm-tag key="waterway" value="dock" zoom-appear="8" />

Maybe some usefull touristic information:
   <pois>
      <osm-tag key="tourism" value="caravan_site" zoom-appear="14" /> <!--Wohnmobil Stellplatz -->
      <osm-tag key="tourism" value="camp_site" zoom-appear="14" />
   </pois>   

Some tertiary roads are tagged like this (no idea why):
   <osm-tag key="highway" value="tertiary_link" zoom-appear="12" />

do you think it´s a rendering problem because of more considered rules in the themes?
At least with the older Galaxy Tab (PT1000) and the Galaxy S2 I didn´t see this problem. Even the 865 MB Alps map (without cycle routes) from jurajs works fine.
(@jurajs, thank you for your effort)

Hi Jusc,

This is very complex issue it depends on many details and im far from beeing able calculate a behaviour of a map in advance.

The Alps are no Problem, it seems that it depends on the amount of vectors per area (eg Vectors/mile²),
this is a serious Problem at low zoom-levels, the worst is level 7, here a major area of a country is visible
_and_ all ncn+icn + major roads appear so the {vectors/area*visible_area} needs lots of calculation time and sometimes crash a phone/app.

This leads to several different "zoom-interval-conf"s for map creation (=amount and ajustment of internal base zoom levels)
+ tagmappings adjusted to these levels (3 base levels per default, 4 for GB+NL otherwise these maps crash).

Another problem are Monster relations (Multipolygons) like the lake district west of Stockholm, while the Sweden is no problem at all,
this single area sometimes causes misbehaviour.

And, of couse you are right, it depends on the phone.
I theory maps that are critical even on the small screen of my Xperia Active should crash every high-resolution screen - however, in the contrary they run fine on SGII, S_Note aso.  8-)

So well... I check the behaviour of every map after major upgrades in the prozessing-sheme.
This lead to 5 mapping runs for GB after adding wateriles till the map rendered reliable on the phone  :roll:

[_not_]

Yeay ! I managed to build my 1st map (Turkmenistan so I could compare it to Christian's map).
It works fine, and seems to be the same as Christian's

Christian, do you accept maps from contributors to help you populate your site and maintain it up to date ? I will probably try to build China, Korea, and other missing maps.

Hi,

Congratulation for building your first map  :!:

China would be a challenge, its a real big country - I suppose it will have to be split into several maps.
The countourlines will take a lot of space (Tibet etc..).

I attached my tag-mapping for wide countrys where the small roads and towns apperar at even low zoom-level,
in my experience it should be OK for China.
Of couse you dont need use it (the tags for cycle/hiking will be useless for you) - just take a look at the zoom-appear's if you want.
There are several tags added too like caravan_site, tertiary_link, water=dock (some harbours are tagged like this) aso...

Once you finish the maps I will make a section for these maps on the download page of openandromaps.org with a brief CP-Notice.

[attachment=0:3l04n50n]tag-mapping-iceland.zip[/attachment:3l04n50n]

Edit:
This tag-mapping should _not_ be uses for crowded areas like Netherlands, Germany, France - it will crash the phone cause of the data overhead.
For crowded areas in China like Peking etc.. it should be testet on phone bevore release.

Database: I would sugest to use the planet file from 4.July.2012, it was the last planet file bevore the redaction-bot startet deleting data from users who don't signed the new OSM-licence.

*edit*: sorry for the noise: if I use the cycle_hc theme there is water! No need for updated Belgium map.

Hi Tommy,

No Problem, the water tiles should be visible too with all the lates kinds of the voilatile* themes.

best regards
Christian

Hi,

The issue is solved, at least for this map, its a problem with rounding in Mapsforge/JTS that
produces self-intersecting land_polygons out of absolut correct geometrys.
The problem with the zero-contourline rendered into sea is solved too.

Thank you, and of course it's in the Northeast of Gran Canaria

Hi,

I checked this issue in brief.
Well....

- All land_polygons are closed (definitly start/end nodes of each pline are the same ref)
- no polyline exeeds the limits (nodes/polyline)
- no JTS-Errors while making the file
- no relations in land-polygones
- a map made with the borders of the test-area shows the same issue.
- both the merged osm file and the land.osm contains 8 land_polygons

The Problem:
- The map file includes only 7 land-polygons, so one is missing, there were no errors while making the map,
the polygon has 380 nodes (so that could not couse a problem).

So, unfortunately I can't solve this issue now, it needs further investigation - sorry.

Edit: You can follow the discussion at mapsforge_dev //https://groups.google.com/forum/?fromgroups#!topic/mapsforge-dev/KVA5YcaRRMg

finally got around to make a donation with PayPal
thanks for your great work with these maps!

Thanks a lot for your donation and to anyone who keeps this projekt alive !

best regards
Christian

Hello Thomas,

Well, seems to be the usual problem with the strikt pline implementation in Mapsforge.

I will take a look at this pline.

best regards
Christian

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is there a reason, why you did not include the austria_hike-map on your website?

This Map was made for testing only, it adds an incredible amount of prozessing time.
I'm curently busy with adding the water-tiles to the maps and there is currently no
time for optimizing the make scripts needed for a mass-produktion of hiking maps.

The website have to be reworked aso....

Later this year I will publish some maps with hiking routes.