Replace coverage map with real world landmasses (Natural Earth 110m)

.gitattributes

@@ -9,3 +9,4 @@ articles/alsace-latest.parquet filter=lfs diff=lfs merge=lfs -text
 polygon_articles/alsace-latest.parquet filter=lfs diff=lfs merge=lfs -text
 polygons/american-oceania-latest.parquet filter=lfs diff=lfs merge=lfs -text
 articles/american-oceania-latest.parquet filter=lfs diff=lfs merge=lfs -text
+coverage_map.png filter=lfs diff=lfs merge=lfs -text

README.md

@@ -23,9 +23,9 @@ configs:
       - split: polygon_articles
         path: polygon_articles/*.parquet
 dataset_info:
-  polygon_count: 5929
-  unique_wikidata_count: 5063
-  article_count: 13937
+  polygon_count: 5788
+  unique_wikidata_count: 4923
+  article_count: 12713
 ---
 
 # NoeFlandre/osm-polygon-wikidata-only
@@ -40,6 +40,10 @@ Generated on 2026-07-10.
 
 Maintained by **Noé Flandre**.
 
+## Coverage
+
+![Coverage Map](coverage_map.png)
+
 ## Schema
 
 ### `polygons`