diff --git a/internal/generate-tree.mjs b/internal/generate-tree.mjs
index ba81419fa..e5f37c57a 100644
--- a/internal/generate-tree.mjs
+++ b/internal/generate-tree.mjs
@@ -1519,6 +1519,12 @@ function main() {
       // for maps that colour every state. The curated file above is UPG-100's 34-unit partition.
       [resolve(__dirname, '..', 'data', 'boundaries', 'gb-IND-ADM1-full.geojson'), 'gb-IND-ADM1-full.geojson'],
       [resolve(__dirname, '..', 'data', 'boundaries', 'gb-IND-ADM1-full.meta.json'), 'gb-IND-ADM1-full.meta.json'],
+      // WEB copies (library/scripts/boundaries/build-web-boundaries.mjs): every feature and island kept, about
+      // a fifth of the bytes. The interactive maps fetch these; posters, print and build-time point-in-polygon
+      // keep the full files above (REPORT-WEB-BOUNDARIES.md).
+      [join(dataDir, 'adm0', 'world-adm0-web.geojson'), 'world-adm0-web.geojson'],
+      [join(dataDir, 'gb-IND-ADM1-web.geojson'), 'gb-IND-ADM1-web.geojson'],
+      [resolve(__dirname, '..', 'data', 'boundaries', 'gb-IND-ADM1-full-web.geojson'), 'gb-IND-ADM1-full-web.geojson'],
     ]) if (existsSync(from)) cpSync(from, join(bDir, to))
     console.log('[generate-tree] gathered boundary geojson')
 
@@ -1579,6 +1585,9 @@ function main() {
       'boundaries/gb-CHN-ADM1.geojson',
       'boundaries/gb-IND-ADM1-full.geojson',        // all 36 states (Cities with Internet's NFHS layer)
       'boundaries/gb-IND-ADM1-full.meta.json',      // its source and licence, served beside it
+      'boundaries/world-adm0-web.geojson',           // the web copies the interactive maps fetch
+      'boundaries/gb-IND-ADM1-web.geojson',
+      'boundaries/gb-IND-ADM1-full-web.geojson',
       // people-groups — all-people-groups.vue (the slim JSON only; NOT the 16 MB CSV,
       // which no element fetches and which dropin.exclude already withholds).
       'people-groups/people-groups-slim.json',
diff --git a/library/composables/useCountryOutline.js b/library/composables/useCountryOutline.js
index 6f514ebad..f3095e22f 100644
--- a/library/composables/useCountryOutline.js
+++ b/library/composables/useCountryOutline.js
@@ -161,7 +161,7 @@ export function useCountryOutline(getMap, opts = {}) {
         // Add EMPTY first, then setData after the fetch, so addLayer below stays SYNCHRONOUS and
         // the outline keeps its place in the layer order.
         m.addSource(SOURCE_ID, { type: 'geojson', data: { type: 'FeatureCollection', features: [] } })
-        fetch(`${resolveAssetsBase(null)}/boundaries/world-adm0.geojson`)
+        fetch(`${resolveAssetsBase(null)}/boundaries/world-adm0-web.geojson`)
           .then((r) => r.json())
           .then((gj) => {
             // The tileset names the ISO field iso_3166_1_alpha_3; the geojson names it iso3.
diff --git a/library/composables/useMapLayers.js b/library/composables/useMapLayers.js
index d5000f7e2..ab1af0f7e 100644
--- a/library/composables/useMapLayers.js
+++ b/library/composables/useMapLayers.js
@@ -434,7 +434,7 @@ export function useMapLayers(options = {}) {
             // EMPTY first so the addLayer below stays synchronous and keeps its z-order slot
             // (regions → shadow → pins → hitbox); setData once the fetch lands.
             map.addSource('regions', { type: 'geojson', data: { type: 'FeatureCollection', features: [] } });
-            fetch(`${resolveAssetsBase(null)}/boundaries/world-adm0.geojson`)
+            fetch(`${resolveAssetsBase(null)}/boundaries/world-adm0-web.geojson`)
                 .then((r) => r.json())
                 .then((gj) => {
                     // Tileset field is iso_3166_1_alpha_3; the geojson's is iso3. Normalise ONCE
diff --git a/plugin-designs/cities-internet/connectivity-map.vue b/plugin-designs/cities-internet/connectivity-map.vue
index d4e0f6874..c4ac0d2e4 100644
--- a/plugin-designs/cities-internet/connectivity-map.vue
+++ b/plugin-designs/cities-internet/connectivity-map.vue
@@ -239,7 +239,7 @@ async function load() {
       // review caught it as "India seems to have no internet coverage". The fix was a
       // second file, world-adm0-plus.geojson; that file is gone and India is fetched
       // at ADM0 like every other country (data/source-boundaries.mjs).
-    fetch(`${assetsBase.value}/boundaries/world-adm0.geojson`).then((r) => r.json()),
+    fetch(`${assetsBase.value}/boundaries/world-adm0-web.geojson`).then((r) => r.json()),
   ])
   rows.value = data.countries || []
   return adm0
@@ -304,7 +304,7 @@ async function loadAdm1() {
     fetch(`${assetsBase.value}/tables/internet-by-adm1.json`).then((r) => { if (!r.ok) throw new Error('internet-by-adm1 ' + r.status); return r.json() }),
     // All 36 states (data/boundaries/gb-IND-ADM1-full.geojson). NOT gb-IND-ADM1.geojson: that one is
     // UPG-100's partition, curated to 34 units, and it left Mizoram and Nagaland with no geometry.
-    fetch(`${assetsBase.value}/boundaries/gb-IND-ADM1-full.geojson`).then((r) => { if (!r.ok) throw new Error('gb-IND-ADM1-full ' + r.status); return r.json() }),
+    fetch(`${assetsBase.value}/boundaries/gb-IND-ADM1-full-web.geojson`).then((r) => { if (!r.ok) throw new Error('gb-IND-ADM1-full ' + r.status); return r.json() }),
   ])
   const byArea = {}
   for (const r of table.rows || []) {
diff --git a/plugin-designs/gospel-resources/resources-map.vue b/plugin-designs/gospel-resources/resources-map.vue
index 09f39a8f8..e2d3793f3 100644
--- a/plugin-designs/gospel-resources/resources-map.vue
+++ b/plugin-designs/gospel-resources/resources-map.vue
@@ -1114,7 +1114,7 @@ async function load() {
       // review caught it as "India seems to have no internet coverage". The fix was a
       // second file, world-adm0-plus.geojson; that file is gone and India is fetched
       // at ADM0 like every other country (data/source-boundaries.mjs).
-    fetch(`${assetsBase.value}/boundaries/world-adm0.geojson`).then((r) => r.json()),
+    fetch(`${assetsBase.value}/boundaries/world-adm0-web.geojson`).then((r) => r.json()),
     // 650KB and it is the point of the map, so it loads with the boundaries rather
     // than behind a tap. URLs are normalised into `codes` by ISO 639-3, so the 12,379
     // pins carry a code rather than 12,379 copies of the same jesusfilm.org link.
@@ -1270,7 +1270,7 @@ async function ensureProvinceTable() {
   return provinceRows.value
 }
 
-const PROVINCE_FILE = { IND: 'gb-IND-ADM1-full.geojson', CHN: 'gb-CHN-ADM1.geojson' }
+const PROVINCE_FILE = { IND: 'gb-IND-ADM1-full-web.geojson', CHN: 'gb-CHN-ADM1.geojson' }
 
 async function ensureProvinces(iso3) {
   const map = mapRef.value
diff --git a/plugin-designs/my-upg-100-list/upg-100-list.vue b/plugin-designs/my-upg-100-list/upg-100-list.vue
index 21472cddf..631ab14eb 100644
--- a/plugin-designs/my-upg-100-list/upg-100-list.vue
+++ b/plugin-designs/my-upg-100-list/upg-100-list.vue
@@ -2210,10 +2210,10 @@ onMounted(async () => {
     // and it overlapped nothing: a promise created after an await starts only once that await
     // resolves, so the code read as parallel and behaved strictly serially.
     const boundaryPromises = {
-      adm0: getJSON('world-adm0.geojson'),
+      adm0: getJSON('world-adm0-web.geojson'),
       adm1Chn: getJSON('gb-CHN-ADM1.geojson'),
       // 1,628 KB, and only the India pg_slugs zones need it.
-      adm1Ind: getJSON('gb-IND-ADM1.geojson'),
+      adm1Ind: getJSON('gb-IND-ADM1-web.geojson'),
     }
 
     // ── live records WITH rop1 + population (full record; LESSON L3 / slice 04u) ──
diff --git a/plugin-designs/regions-dashboard/src/RegionCountryMap.vue b/plugin-designs/regions-dashboard/src/RegionCountryMap.vue
index be0289c45..18cbe726f 100644
--- a/plugin-designs/regions-dashboard/src/RegionCountryMap.vue
+++ b/plugin-designs/regions-dashboard/src/RegionCountryMap.vue
@@ -274,7 +274,7 @@ function addLayers() {
       // Add EMPTY first, then setData after the fetch: the addLayer calls below must run
       // SYNCHRONOUSLY to keep these fills beneath the pins (layer order is insertion order).
       m.addSource(SRC_COUNTRIES, { type: 'geojson', data: { type: 'FeatureCollection', features: [] } })
-      fetch(`${resolveAssetsBase(profileConfig?.value)}/boundaries/world-adm0.geojson`)
+      fetch(`${resolveAssetsBase(profileConfig?.value)}/boundaries/world-adm0-web.geojson`)
         .then((r) => r.json())
         .then((gj) => {
           for (const f of gj.features || []) {
diff --git a/plugin-designs/research-dashboard/src/components/dashboards/DashboardMapPanel.vue b/plugin-designs/research-dashboard/src/components/dashboards/DashboardMapPanel.vue
index ec35de367..8bca847d5 100644
--- a/plugin-designs/research-dashboard/src/components/dashboards/DashboardMapPanel.vue
+++ b/plugin-designs/research-dashboard/src/components/dashboards/DashboardMapPanel.vue
@@ -834,7 +834,7 @@ function addLayers() {
       // keep this layer underneath the pins (layer order is insertion order). An awaited fetch
       // here would put the choropleth on TOP of every bubble.
       m.addSource('rd-countries', { type: 'geojson', data: { type: 'FeatureCollection', features: [] } })
-      fetch(`${resolveAssetsBase(profileConfig.value)}/boundaries/world-adm0.geojson`)
+      fetch(`${resolveAssetsBase(profileConfig.value)}/boundaries/world-adm0-web.geojson`)
         .then((r) => r.json())
         .then((gj) => {
           for (const f of gj.features || []) {