Publish dataset card and polygon statistics report

README.md

@@ -44,7 +44,6 @@ dataset_info:
   unique_wikidata_count: 1119223
   article_count: 2273750
 ---
-
 # NoeFlandre/osm-polygon-wikidata-only
 
 ![NoeFlandre/osm-polygon-wikidata-only dataset overview](assets/dataset_hero.png)
@@ -63,8 +62,6 @@ OSM polygons tagged with a `wikidata=*` reference, enriched with Wikipedia and W
 
 Links are derived from the Wikidata identifiers shared by each OSM polygon and its Wikipedia or Wikivoyage documents.
 
-Generated on 2026-08-02.
-
 Maintained by **Noé Flandre**.
 
 Source code: [GitHub repository](https://github.com/NoeFlandre/osm-polygon-wikidata-only).
@@ -99,13 +96,13 @@ The funnel's language thresholds use the canonical Wikipedia polygon fields. Wik
 
 ![Polygons with Wikipedia or Wikivoyage text](assets/geographic_text_presence.png)
 
-Each point is a dataset polygon with at least one non-empty Wikipedia document or a non-empty Wikivoyage document sharing its Wikidata entity. A polygon is shown once even when several documents qualify.
+Each point is one globally unique `(osm_type, osm_id)` polygon identity linked to a Wikipedia or Wikivoyage document whose extraction succeeded (`fetch_status=ok`) and whose trimmed `full_text` is non-empty. Overlapping regional rows and multiple qualifying documents count once.
 
 ### All dataset polygons
 
 ![Coverage Map](assets/coverage_map.png)
 
-Each point represents one dataset polygon carrying an OSM `wikidata=*` tag, whether or not corresponding Wikipedia or Wikivoyage text is available.
+Each point represents one globally unique `(osm_type, osm_id)` identity carrying an OSM `wikidata=*` tag, whether or not corresponding Wikipedia or Wikivoyage text is available. Regional polygon rows remain separate source records.
 
 ## Geographic coverage
 
@@ -113,106 +110,27 @@ Each point represents one dataset polygon carrying an OSM `wikidata=*` tag, whet
 
 ![Geographic Wikipedia and Wikivoyage Text Density](assets/geographic_text_density.png)
 
-Each H3 cell contains the raw number of polygons with non-empty Wikipedia or Wikivoyage text. A polygon is counted once even when both projects or several documents qualify. Colour uses a logarithmic purple-to-yellow scale; this is an absolute density count, not a proportion of all polygons.
+Each H3 cell contains the raw number of unique `(osm_type, osm_id)` polygon identities with successfully extracted (`fetch_status=ok`) non-empty Wikipedia or Wikivoyage text. A polygon is counted once even when both projects, several documents, or overlapping regional rows qualify. Colour uses a logarithmic purple-to-yellow scale; this is an absolute density count, not a proportion of all polygon rows.
 
 ## Dataset snapshot
 
 | Metric | Value |
 | --- | ---: |
 | Polygon rows across regional extracts | 1,184,110 |
-| Unique Wikidata entities | 1,119,223 |
 | Unique polygon identities (osm_type, osm_id) | 1,157,841 |
 | Polygons with successful non-empty text (unique OSM identities) | 650,663 |
-| Wikipedia polygon-document links | 2,468,604 |
-| Wikipedia + Wikivoyage languages | 351 |
-| Geographic regions | 375 |
-| Polygon and link tables size | 9.9 GB |
 | Wikipedia documents | 2,273,750 |
 | Wikipedia sections | 11,997,165 |
-| Wikivoyage documents | 14,420 |
-| Wikivoyage sections | 302,200 |
-| Wikidata facts | 3,901,092 |
-| Wikipedia + Wikivoyage document words | 801,528,334 |
+| Wikipedia + Wikivoyage languages | 351 |
+| Geographic regions | 375 |
 | Total Parquet size | 19.2 GB |
 
 Polygon rows retain regional copies. Identity metrics use one deterministic representative per `(osm_type, osm_id)`; successful text additionally requires `fetch_status=ok` and trimmed non-empty `full_text`.
 
-Wikipedia + Wikivoyage document words sums the full Wikipedia and Wikivoyage documents and excludes section rows because sections duplicate document text.
-
-## Polygon surface and geometry
-
-Recomputed from every row of the published `polygons/*.parquet` table before each dataset-card publication: all 1,184,110 rows across 375 regional files, with no sampling and no other input. Areas are the table's own `area_m2` values (WGS84 equirectangular approximation, holes subtracted); shape and extent figures are decoded from the `geometry` and `bbox` columns. The complete machine-readable report, including the per-source breakdown, is published as [`stats.json`](stats.json).
-
-| Surface (`area_m2`) | Value |
-| --- | ---: |
-| Total surface | 179,051,037,796,358.66 m2 (179,051,037.7964 km2) |
-| Smallest | 0.00 m2 (0.0000 km2) |
-| 1st percentile | 19.72 m2 (0.0000 km2) |
-| 5th percentile | 74.16 m2 (0.0001 km2) |
-| 25th percentile | 279.72 m2 (0.0003 km2) |
-| Median | 1,357.58 m2 (0.0014 km2) |
-| Mean | 151,211,490.31 m2 (151.2115 km2) |
-| 75th percentile | 25,686.48 m2 (0.0257 km2) |
-| 95th percentile | 1,651,939.20 m2 (1.6519 km2) |
-| 99th percentile | 84,290,034.95 m2 (84.2900 km2) |
-| Largest | 10,159,934,507,090.38 m2 (10,159,934.5071 km2) |
-| Degenerate (`area_m2` <= 0) | 0 polygons |
-| Below 1 m2 | 203 polygons |
-| Missing `area_m2` | 0 polygons |
-
-| Geometry shape | Value |
-| --- | ---: |
-| `Polygon` rows | 0 |
-| `MultiPolygon` rows | 1,184,110 |
-| Rows with holes | 9,538 |
-| Undecodable `geometry` | 0 |
-| Total rings | 1,699,525 |
-| Total holes | 169,758 |
-| Total vertices | 154,750,715 |
-| Vertices per polygon (median / p95 / max) | 13.0 / 166.0 / 1,896,985 |
-| Rings per polygon (median / p95 / max) | 1.0 / 1.0 / 18,353 |
-| Components per polygon (median / p95 / max) | 1.0 / 1.0 / 18,344 |
-
-| Extent | Value |
-| --- | ---: |
-| Dataset bounding box | `[-180.000000, -85.051129, 180.000000, 86.340269]` |
-| Bbox width in degrees (median / p95 / max) | 0.000677 / 0.029185 / 360.000000 |
-| Bbox height in degrees (median / p95 / max) | 0.000453 / 0.019231 / 46.234805 |
-| Bbox width in metres (median / p95 / max) | 52.17 / 2,153.60 / 39,663,756.23 |
-| Bbox height in metres (median / p95 / max) | 50.45 / 2,140.83 / 5,146,834.95 |
-| Bbox wider than 180 degrees | 26 polygons |
-| Bbox touching a pole | 0 polygons |
-| Undecodable `bbox` | 0 polygons |
-
-| Area bucket (log scale) | Polygons |
-| --- | ---: |
-| `non_positive` | 0 |
-| `0_to_1_m2` | 203 |
-| `1e0_to_1e1_m2` | 4,864 |
-| `1e1_to_1e2_m2` | 82,428 |
-| `1e2_to_1e3_m2` | 465,543 |
-| `1e3_to_1e4_m2` | 236,631 |
-| `1e4_to_1e5_m2` | 203,909 |
-| `1e5_to_1e6_m2` | 115,436 |
-| `1e6_to_1e7_m2` | 47,792 |
-| `1e7_to_1e8_m2` | 16,439 |
-| `1e8_to_1e9_m2` | 6,851 |
-| `1e9_to_1e10_m2` | 2,945 |
-| `1e10_to_1e11_m2` | 836 |
-| `1e11_to_1e12_m2` | 203 |
-| `ge_1e12_m2` | 30 |
-
-**Field definitions:**
-
-- `Total surface`: sum of `area_m2` over every published polygon row. Overlapping polygons are summed independently, so this is the total polygon surface, not the distinct land area covered.
-- Percentiles and medians interpolate linearly between the two closest ranks.
-- `Degenerate`: rows whose recorded `area_m2` is zero or negative. `Below 1 m2` counts rows with a positive area smaller than one square metre.
-- A vertex is one coordinate pair; each ring's repeated closing coordinate is counted once. A hole is an inner ring, and `Components` is the number of `MultiPolygon` members, which is `1` for every `Polygon` row.
-- Metre spans convert the degree spans with the same equirectangular rule used for `area_m2`, evaluated at each bounding box's mean latitude.
-- `Bbox wider than 180 degrees` is the antimeridian signature: the box spans more than half the globe because the polygon crosses longitude 180.
-- Area buckets are half-open decade intervals `[lower, upper)` in square metres; the bucket list is identical in every report so two reports stay comparable.
+<details>
+<summary>Full statistics — languages, corpora, storage</summary>
 
-## Language distribution
+### Language distribution
 
 Top 20 languages across Wikipedia and Wikivoyage documents:
 
@@ -253,7 +171,7 @@ Document counts include canonical rows from both projects. Polygon counts are un
 - 5 language(s) appear in fewer than 10 Wikipedia + Wikivoyage documents
 - 4 language(s) appear in fewer than 5 polygons with successful non-empty text
 
-## Storage accounting
+### Storage accounting
 
 Core tables size and total storage size are additive:
 
@@ -263,7 +181,7 @@ Core tables size and total storage size are additive:
 | Wikipedia, Wikivoyage, and Wikidata tables size | 18,338,737,425 | 17.1 GB |
 | Total Parquet size | 20,581,872,487 | 19.2 GB |
 
-## Wikipedia text corpus
+### Wikipedia text corpus
 
 ### Documents
 
@@ -318,7 +236,7 @@ Estimated tokens use a transparent approximation: `characters // 4` per non-empt
 | zh | 60,408 | 2.7% |
 
 
-## Wikivoyage text corpus
+### Wikivoyage text corpus
 
 ### Documents
 
@@ -373,7 +291,7 @@ Estimated tokens use a transparent approximation: `characters // 4` per non-empt
 | nl | 509 | 3.5% |
 
 
-## Wikidata facts
+### Wikidata facts
 
 | Metric | Value |
 | --- | ---: |
@@ -412,6 +330,85 @@ Estimated tokens use a transparent approximation: `characters // 4` per non-empt
 
 English labels are requested where available; multilingual labels are preserved verbatim in the Parquet column `property_labels`.
 
+</details>
+
+<details>
+<summary>Polygon surface and geometry</summary>
+
+### Polygon surface and geometry
+
+Recomputed from every row of the published `polygons/*.parquet` table before each dataset-card publication: all 1,184,110 rows across 375 regional files, with no sampling and no other input. Areas are the table's own `area_m2` values (WGS84 equirectangular approximation, holes subtracted); shape and extent figures are decoded from the `geometry` and `bbox` columns. The complete machine-readable report, including the per-source breakdown, is published as [`stats.json`](stats.json).
+
+| Surface (`area_m2`) | Value |
+| --- | ---: |
+| Total surface | 179,051,037,796,358.66 m2 (179,051,037.7964 km2) |
+| Smallest | 0.00 m2 (0.0000 km2) |
+| 1st percentile | 19.72 m2 (0.0000 km2) |
+| 5th percentile | 74.16 m2 (0.0001 km2) |
+| 25th percentile | 279.72 m2 (0.0003 km2) |
+| Median | 1,357.58 m2 (0.0014 km2) |
+| Mean | 151,211,490.31 m2 (151.2115 km2) |
+| 75th percentile | 25,686.48 m2 (0.0257 km2) |
+| 95th percentile | 1,651,939.20 m2 (1.6519 km2) |
+| 99th percentile | 84,290,034.95 m2 (84.2900 km2) |
+| Largest | 10,159,934,507,090.38 m2 (10,159,934.5071 km2) |
+| Degenerate (`area_m2` <= 0) | 0 polygons |
+| Below 1 m2 | 203 polygons |
+| Missing `area_m2` | 0 polygons |
+
+| Geometry shape | Value |
+| --- | ---: |
+| `Polygon` rows | 0 |
+| `MultiPolygon` rows | 1,184,110 |
+| Rows with holes | 9,538 |
+| Undecodable `geometry` | 0 |
+| Total rings | 1,699,525 |
+| Total holes | 169,758 |
+| Total vertices | 154,750,715 |
+| Vertices per polygon (median / p95 / max) | 13.0 / 166.0 / 1,896,985 |
+| Rings per polygon (median / p95 / max) | 1.0 / 1.0 / 18,353 |
+| Components per polygon (median / p95 / max) | 1.0 / 1.0 / 18,344 |
+
+| Extent | Value |
+| --- | ---: |
+| Dataset bounding box | `[-180.000000, -85.051129, 180.000000, 86.340269]` |
+| Bbox width in degrees (median / p95 / max) | 0.000677 / 0.029185 / 360.000000 |
+| Bbox height in degrees (median / p95 / max) | 0.000453 / 0.019231 / 46.234805 |
+| Bbox width in metres (median / p95 / max) | 52.17 / 2,153.60 / 39,663,756.23 |
+| Bbox height in metres (median / p95 / max) | 50.45 / 2,140.83 / 5,146,834.95 |
+| Bbox wider than 180 degrees | 26 polygons |
+| Bbox touching a pole | 0 polygons |
+| Undecodable `bbox` | 0 polygons |
+
+| Area bucket (log scale) | Polygons |
+| --- | ---: |
+| `non_positive` | 0 |
+| `0_to_1_m2` | 203 |
+| `1e0_to_1e1_m2` | 4,864 |
+| `1e1_to_1e2_m2` | 82,428 |
+| `1e2_to_1e3_m2` | 465,543 |
+| `1e3_to_1e4_m2` | 236,631 |
+| `1e4_to_1e5_m2` | 203,909 |
+| `1e5_to_1e6_m2` | 115,436 |
+| `1e6_to_1e7_m2` | 47,792 |
+| `1e7_to_1e8_m2` | 16,439 |
+| `1e8_to_1e9_m2` | 6,851 |
+| `1e9_to_1e10_m2` | 2,945 |
+| `1e10_to_1e11_m2` | 836 |
+| `1e11_to_1e12_m2` | 203 |
+| `ge_1e12_m2` | 30 |
+
+**Field definitions:**
+
+- `Total surface`: sum of `area_m2` over every published polygon row. Overlapping polygons are summed independently, so this is the total polygon surface, not the distinct land area covered.
+- Percentiles and medians interpolate linearly between the two closest ranks.
+- `Degenerate`: rows whose recorded `area_m2` is zero or negative. `Below 1 m2` counts rows with a positive area smaller than one square metre.
+- A vertex is one coordinate pair; each ring's repeated closing coordinate is counted once. A hole is an inner ring, and `Components` is the number of `MultiPolygon` members, which is `1` for every `Polygon` row.
+- Metre spans convert the degree spans with the same equirectangular rule used for `area_m2`, evaluated at each bounding box's mean latitude.
+- `Bbox wider than 180 degrees` is the antimeridian signature: the box spans more than half the globe because the polygon crosses longitude 180.
+- Area buckets are half-open decade intervals `[lower, upper)` in square metres; the bucket list is identical in every report so two reports stay comparable.
+
+</details>
 
 ## Geographic distribution by continent
 
@@ -419,23 +416,23 @@ This table is recomputed from the finalized Parquet tables before each dataset-c
 
 | Continent | Polygons | Wikipedia documents | Wikivoyage documents | Polygons with Wikipedia text | Polygons with Wikipedia or Wikivoyage text | Text coverage |
 | --- | ---: | ---: | ---: | ---: | ---: | ---: |
-| Africa | 11,289 | 55,254 | 550 | 8,309 | 8,309 | 73.6% |
+| Africa | 10,968 | 55,254 | 550 | 8,004 | 8,004 | 73.0% |
 | Antarctica | 254 | 1,684 | 1 | 251 | 251 | 98.8% |
-| Asia | 117,610 | 387,567 | 1,811 | 94,924 | 94,945 | 80.7% |
-| Europe | 792,569 | 1,073,709 | 5,163 | 373,782 | 373,782 | 47.2% |
-| North America | 162,012 | 392,739 | 3,429 | 120,166 | 120,167 | 74.2% |
+| Asia | 116,622 | 387,567 | 1,811 | 93,995 | 94,016 | 80.6% |
+| Europe | 773,358 | 1,073,709 | 5,163 | 364,557 | 364,557 | 47.1% |
+| North America | 158,035 | 392,739 | 3,429 | 116,445 | 116,446 | 73.7% |
 | Oceania | 19,807 | 30,678 | 396 | 11,467 | 11,468 | 57.9% |
-| South America | 18,906 | 63,181 | 786 | 13,503 | 13,503 | 71.4% |
-| Unassigned | 61,663 | 193,785 | 2,007 | 43,824 | 43,826 | 71.1% |
+| South America | 18,455 | 63,181 | 786 | 13,115 | 13,115 | 71.1% |
+| Unassigned | 60,342 | 193,785 | 2,007 | 42,804 | 42,806 | 70.9% |
 
 **Metric definitions:**
 
-- `Polygons`: dataset polygons whose centroid is assigned to the continent. Every polygon appears in exactly one continent row, including `Unassigned`.
-- `Wikipedia documents`: distinct non-empty Wikipedia documents connected to those polygons through `polygon_articles`. A document is counted once within a continent, but may appear in more than one continent when linked polygons span more than one continent.
-- `Wikivoyage documents`: distinct non-empty Wikivoyage documents whose Wikidata entity is shared by a polygon in the continent. The same cross-continent counting rule applies.
-- `Polygons with Wikipedia text`: polygons linked to at least one non-empty Wikipedia document.
-- `Polygons with Wikipedia or Wikivoyage text`: polygons satisfying the Wikipedia condition or sharing a Wikidata entity with at least one non-empty Wikivoyage document. Each polygon is counted once.
-- `Text coverage`: `combined text-covered polygons / all dataset polygons` in the continent row.
+- `Polygons`: globally unique `(osm_type, osm_id)` identities whose deterministic representative centroid is assigned to the continent. Every identity appears in exactly one continent row, including `Unassigned`; regional polygon rows remain separate source records.
+- `Wikipedia documents`: distinct successfully extracted Wikipedia documents with trimmed non-empty `full_text`, connected to those identities through `polygon_articles`. A document is counted once within a continent, but may appear in more than one continent when linked polygons span more than one continent.
+- `Wikivoyage documents`: distinct successfully extracted Wikivoyage documents with trimmed non-empty `full_text` whose Wikidata entity is shared by an identity in the continent. The same cross-continent counting rule applies.
+- `Polygons with Wikipedia text`: unique identities linked to at least one successfully extracted (`fetch_status=ok`) Wikipedia document with trimmed non-empty `full_text`.
+- `Polygons with Wikipedia or Wikivoyage text`: unique identities satisfying the Wikipedia condition or linked to a successfully extracted Wikivoyage document with trimmed non-empty `full_text`. Each identity is counted once.
+- `Text coverage`: `combined text-covered identities / all unique polygon identities` in the continent row.
 
 ## Schema
 
@@ -605,24 +602,6 @@ This table is recomputed from the finalized Parquet tables before each dataset-c
 | `retrieved_at` | ISO-8601 UTC timestamp when the pipeline fetched the entity. |
 | `source_api` | Which API was queried (always `wikidata_action_api`). |
 
-
-## Language partitions
-
-The V1 language release is an additive, row-level partition of the published text tables.
-Each source row is routed by its normalized `language` value; multilingual rows are not collapsed to a polygon-level preferred language.
-Missing, blank, malformed, and legacy-unusable values are preserved in the explicit `lang-unknown` partition.
-
-Validated languages: **348** (including `unknown`).
-
-| Configuration | Split names | Remote path |
-| --- | --- | --- |
-| `polygon_articles_by_language` | `lang-<language>` and `lang-unknown` | `data/polygon_articles_by_language/lang-<language>-00000-of-00001.parquet` |
-| `wikipedia_documents_by_language` | `lang-<language>` and `lang-unknown` | `data/wikipedia_documents_by_language/lang-<language>-00000-of-00001.parquet` |
-| `wikipedia_sections_by_language` | `lang-<language>` and `lang-unknown` | `data/wikipedia_sections_by_language/lang-<language>-00000-of-00001.parquet` |
-| `wikivoyage_documents_by_language` | `lang-<language>` and `lang-unknown` | `data/wikivoyage_documents_by_language/lang-<language>-00000-of-00001.parquet` |
-| `wikivoyage_sections_by_language` | `lang-<language>` and `lang-unknown` | `data/wikivoyage_sections_by_language/lang-<language>-00000-of-00001.parquet` |
-
-The release manifest records the source fingerprint, schema, row counts, and SHA-256 hash for every generated file.
 ## Data sources & licenses
 
 - **OpenStreetMap** polygons: (c) OpenStreetMap contributors, licensed under [ODbL 1.0](https://opendatacommons.org/licenses/odbl/).