missing Kaspian sea: https://www.openstreetmap.org/relation/3987743

prepare data:
```bash
cd /media/karry/mamut/osm/planet/

osmium tags-filter -t --progress --verbose planet-260803.osm.pbf \
  wr/boundary=administrative \
  wr/natural=coastline \
  nwr/place=continent \
  nwr/place=city \
  n/place=ocean \
  n/place=country \
  nwr/place=sea \
  -o /media/karry/mamut/osm/planet/planet-260803-extract.osm.pbf

cd /home/karry/data/cecko/OSM/libosmscout/cmake-build-relwithdebinfo
make -j $(nproc)
mkdir /media/karry/mamut/osm/basemap-260803
time ./Import/Import \
  -s 0 -e 1000 \
  -d \
  --typefile /home/karry/data/cecko/OSM/libosmscout/stylesheets/basemap.ost \
  --rawCoordBlockSize 60000000 \
  --rawWayBlockSize 4000000 \
  --altLangOrder \# \
  --waterIndexMinMag 6 \
  --waterIndexMaxMag 6 \
  --waterMaxDistance 2048 \
  --lowZoomOptMaxMag 6 \
  --areaNodeGridMag 6 \
  --langOrder en,# \
  --relMaxWays 5000 \
  --relMaxCoords 500000 \
  --destinationDirectory /media/karry/mamut/osm/basemap-260803-waterindex \
  /media/karry/mamut/osm/planet/planet-260803-extract.osm.pbf \
  2>&1 | tee /media/karry/mamut/osm/basemap-260803/import.log

cd /media/karry/mamut/osm
mkdir basemap-260803-dist

cp \
  basemap-260803/*.html \
  "basemap-260803/stats.dot" \
  "basemap-260803/types.dat" \
  "basemap-260803/bounding.dat" \
  "basemap-260803/nodes.dat" \
  "basemap-260803/areas.dat" \
  "basemap-260803/ways.dat" \
  "basemap-260803/areanode.idx" \
  "basemap-260803/areaarea.idx" \
  "basemap-260803/areaway.idx" \
  "basemap-260803/arearoute.idx" \
  "basemap-260803/route.dat" \
  "basemap-260803/areasopt.dat" \
  "basemap-260803/waysopt.dat" \
  "basemap-260803/location.idx" \
  "basemap-260803/intersections.dat" \
  "basemap-260803/intersections.idx" \
  "basemap-260803/router.dat" \
  "basemap-260803/router2.dat" \
  "basemap-260803/textloc.dat" \
  "basemap-260803/textother.dat" \
  "basemap-260803/textpoi.dat" \
  "basemap-260803/textregion.dat" \
  "basemap-260803/location_full.txt" \
  "basemap-260803/location_region.txt" \
  "basemap-260803/nodes.idmap" \
  "basemap-260803/areas.idmap" \
  "basemap-260803/ways.idmap" \
  "basemap-260803/coverage.idx" \
  "basemap-260803/ptroutes.dat" \
  "basemap-260803/water.idx" \
  basemap-260803-dist
  
```