Re: [mkgmap-dev] Misplaced boundary POI
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Hi Gerd, Have found similar instances with provincial and district boundaries that border Zambia, namely Rhumphi (https://www.openstreetmap.org/relation/7342877) on the border with Zambia and Malawi, Matabeleland North, Hwange and Kariba all provinces of Zimbabwe. It would appear that where the boundary is incomplete and the section that is there is relatively small the POI generated by --add-pois-to-areas ends up outside the boundary. Attached image shows the area around Victoria Falls showing the misplaced Hwange and Matabeleland North as well as the Zimbabwe label. Kind regards, Dave From: dfjkman@gmail.com <dfjkman@gmail.com> Sent: 05 July 2021 18:54 To: 'mkgmap-dev@lists.mkgmap.org.uk' <mkgmap-dev@lists.mkgmap.org.uk> Subject: 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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dfjkman@gmail.com