Похоже, что проблемы с кодировками GRASS в QGIS решили и я решил попробовать очередную попытку упрощения данных, но споткнулся на первом же шаге - загрузке шейпа в GRASS. Использую команду:
Шейп в Меркаторе. Картина следующая (исходный слой и часть, импортированная в GRASS (красным)): почему-то выгрузились только некоторые фрагменты оригинального слоя.
v.in.ogr -o dsn=C:/personal/next/regions2000_wgs_shp/regions2000/regions2000_wgs.shp output=export snap=100 min_area=1
Datum not recognised by GRASS and no parameters found
Over-riding projection check
Layer: regions2000_wgs
Importing map 1517 features...
Area size [0.0e+000], area not imported
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Area size [0.0e+000], area not imported
1 feature without geometry
-----------------------------------------------------
Building topology for vector map ...
Registering primitives...
1000
1272 primitives registered
33561 vertices registered
Building areas...
1253 areas built
1254 isles built
Attaching islands...
Attaching centroids...
Number of nodes: 1262
Number of primitives: 1272
Number of points: 0
Number of lines: 0
Number of boundaries: 1272
Number of centroids: 0
Number of areas: 1253
Number of isles: 1254
Number of incorrect boundaries: 19
Number of areas without centroid: 1253
-----------------------------------------------------
Cleaning polygons, result is not guaranteed!
Building topology for vector map ...
Number of nodes: 1262
Number of primitives: 1272
Number of points: 0
Number of lines: 0
Number of boundaries: 1272
Number of centroids: 0
Number of areas: -
Number of isles: -
-----------------------------------------------------
Snap boundaries (threshold = 1.000e+002):
-----------------------------------------------------
Break polygons:
-----------------------------------------------------
Remove duplicates:
-----------------------------------------------------
Break boundaries:
-----------------------------------------------------
Remove duplicates:
-----------------------------------------------------
Clean boundaries at nodes:
-----------------------------------------------------
Change dangles to lines:
-----------------------------------------------------
Remove bridges:
-----------------------------------------------------
Building topology for vector map ...
Building areas...
1264 areas built
1258 isles built
Attaching islands...
Number of nodes: 1338
Number of primitives: 1389
Number of points: 0
Number of lines: 0
Number of boundaries: 1389
Number of centroids: 0
Number of areas: 1264
Number of isles: 1258
Number of areas without centroid: 1264
Layer: regions2000_wgs
-----------------------------------------------------
-----------------------------------------------------
Building topology for vector map ...
Registering primitives...
1000 2000
2545 primitives registered
32953 vertices registered
Building areas...
1264 areas built
1258 isles built
Attaching islands...
Attaching centroids...
Number of nodes: 2539
Number of primitives: 2545
Number of points: 0
Number of lines: 0
Number of boundaries: 1281
Number of centroids: 1264
Number of areas: 1264
Number of isles: 1258
-----------------------------------------------------
1520 input polygons
Total area: 1.464541e+017 (1264 areas)
Overlapping area: 0.000000e+000 (0 areas)
Area without category: 0.000000e+000 (0 areas)
Successfully finished