Hi Dave,
not sure what to do with this.
1) The points which are generated for areas are not guaranteed to be inside the
area
2) We can decide to generate NO point for an incomplete or otherwise invalid
type=[multipolygon|boundary] relation
reg. "The POI to the east would appear to have both Zambia and Zimbabwe
assigned to it":
That's not possible. I assume you see the popup for the boundary line.
Used echotags to check this:
boundary = administrative & mkgmap:area2poi = true & admin_level = 2
{echotags ""}[0x1400 resolution 16-20]
Gerd
________________________________________
Von: mkgmap-dev <[email protected]> im Auftrag von
[email protected] <[email protected]>
Gesendet: Montag, 5. Juli 2021 18:54
An: [email protected]
Betreff: [mkgmap-dev] Misplaced boundary POI
Hi Gerd,
The other day I noticed that the country name along the boundary between Zambia
and Zimbabwe was misplaced in 2 regions, see the attached images. The name also
switches at different detail levels in BaseCamp, at Medium and High it shows
Zimbabwe north of the border and at Higher and Highest it shows Zambia. The POI
to the east would appear to have both Zambia and Zimbabwe assigned to it while
to the west, near Livingstone, would appear to be 2 separate POIs.
I have created a map with only the boundaries to show this clearly as it is
missed when the map has more detail in it. The map was created from
zambia-latest.osm.pbf from Geofabrik and split using Splitter version 615 with
the following options:
java -jar -Xmx2g C:\Users\Dave\Documents\Maps\Utils\splitter\splitter.jar
--output=pbf
--resolution=13
--description="ZM_OSM Map"
--wanted-admin-level=5
--mapid=2635
--max-nodes=2600000
The map was created with mkgmap-r4801, although I have noticed it with earlier
versions. Options as follows:
Java -jar -Xmx7g C:\Users\Dave\Documents\Maps\Utils\mkgmap\mkgmap.jar
--keep-going
--latin1
--add-pois-to-areas
--gmapi
--style-file='C:\Users\Dave\Documents\Maps\Styles\boundaries'
-c
C:\Users\Dave\Documents\Maps\Zambia\Split_Files\template.args
In the basic boundary style I have the following files:
Options
levels = 0:24, 1:22, 2:20, 3:18
overview-levels = 4:17, 5:16, 6:15, 7:14, 8:13
Lines
boundary=administrative & admin_level<3 [0x1e resolution 12]
Points
boundary = administrative & mkgmap:area2poi = true & admin_level
= 2 [0x1400 resolution 16-20]
<finalize>
name = * {name '${name}'}
This is not something that overly worries me but if it happens here it may
happen elsewhere and be missed. I have not analysed my maps to see if it
happens with other provincial or district boundaries.
Kind regards,
Dave
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