diff --git a/buf.gen.yaml b/buf.gen.yaml
index a3c0343..08e4ecd 100644
--- a/buf.gen.yaml
+++ b/buf.gen.yaml
@@ -17,3 +17,4 @@ plugins:
       - enumsAsLiterals=true
       # - outputIndex=true
       - oneof=unions
+      - Mgeometry/stub.proto=@comapeo/geometry
diff --git a/package-lock.json b/package-lock.json
index 8180c2f..771aa9a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,14 +1,15 @@
 {
-  "name": "@mapeo/schema",
+  "name": "@comapeo/schema",
   "version": "1.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
-      "name": "@mapeo/schema",
+      "name": "@comapeo/schema",
       "version": "1.0.0",
       "license": "MIT",
       "dependencies": {
+        "@comapeo/geometry": "^1.0.1",
         "compact-encoding": "^2.12.0",
         "protobufjs": "^7.2.5",
         "type-fest": "^4.26.0"
@@ -24,7 +25,7 @@
         "eslint": "^8.46.0",
         "glob": "^10.3.3",
         "hypercore": "^10.4.1",
-        "json-schema-to-typescript": "^13.0.2",
+        "json-schema-to-typescript": "^15.0.2",
         "mkdirp": "^3.0.1",
         "npm-run-all": "^4.1.5",
         "prettier": "^3.0.0",
@@ -46,6 +47,24 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/@apidevtools/json-schema-ref-parser": {
+      "version": "11.7.0",
+      "resolved": "https://registry.npmjs.org/@apidevtools/json-schema-ref-parser/-/json-schema-ref-parser-11.7.0.tgz",
+      "integrity": "sha512-pRrmXMCwnmrkS3MLgAIW5dXRzeTv6GLjkjb4HmxNnvAKXN1Nfzp4KmGADBQvlVUcqi+a5D+hfGDLLnd5NnYxog==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jsdevtools/ono": "^7.1.3",
+        "@types/json-schema": "^7.0.15",
+        "js-yaml": "^4.1.0"
+      },
+      "engines": {
+        "node": ">= 16"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/philsturgeon"
+      }
+    },
     "node_modules/@babel/code-frame": {
       "version": "7.22.5",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.22.5.tgz",
@@ -152,24 +171,6 @@
         "node": ">=4"
       }
     },
-    "node_modules/@bcherny/json-schema-ref-parser": {
-      "version": "10.0.5-fork",
-      "resolved": "https://registry.npmjs.org/@bcherny/json-schema-ref-parser/-/json-schema-ref-parser-10.0.5-fork.tgz",
-      "integrity": "sha512-E/jKbPoca1tfUPj3iSbitDZTGnq6FUFjkH6L8U2oDwSuwK1WhnnVtCG7oFOTg/DDnyoXbQYUiUiGOibHqaGVnw==",
-      "dev": true,
-      "dependencies": {
-        "@jsdevtools/ono": "^7.1.3",
-        "@types/json-schema": "^7.0.6",
-        "call-me-maybe": "^1.0.1",
-        "js-yaml": "^4.1.0"
-      },
-      "engines": {
-        "node": ">= 16"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/philsturgeon"
-      }
-    },
     "node_modules/@bcoe/v8-coverage": {
       "version": "0.2.3",
       "resolved": "https://registry.npmjs.org/@bcoe/v8-coverage/-/v8-coverage-0.2.3.tgz",
@@ -295,6 +296,15 @@
         "node": ">=12"
       }
     },
+    "node_modules/@comapeo/geometry": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@comapeo/geometry/-/geometry-1.0.1.tgz",
+      "integrity": "sha512-ZH9akj8k/awYUm8GVGyGSs99xNGJotWoo3czCS3Ds3/RgewiSxHbe1JU6PnJ/M2sT6GqbTatAGgNky9g5pK6Vg==",
+      "license": "MIT",
+      "dependencies": {
+        "protobufjs": "^7.4.0"
+      }
+    },
     "node_modules/@eslint-community/eslint-utils": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.4.0.tgz",
@@ -563,7 +573,8 @@
       "version": "7.1.3",
       "resolved": "https://registry.npmjs.org/@jsdevtools/ono/-/ono-7.1.3.tgz",
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-      "dev": true
+      "dev": true,
+      "license": "MIT"
     },
     "node_modules/@json-schema-spec/json-pointer": {
       "version": "0.1.2",
@@ -718,16 +729,6 @@
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       "dev": true
     },
-    "node_modules/@types/glob": {
-      "version": "7.2.0",
-      "resolved": "https://registry.npmjs.org/@types/glob/-/glob-7.2.0.tgz",
-      "integrity": "sha512-ZUxbzKl0IfJILTS6t7ip5fQQM/J3TJYubDm3nMbgubNNYS62eXeUpoLUC8/7fJNiFYHTrGPQn7hspDUzIHX3UA==",
-      "dev": true,
-      "dependencies": {
-        "@types/minimatch": "*",
-        "@types/node": "*"
-      }
-    },
     "node_modules/@types/hast": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/@types/hast/-/hast-3.0.4.tgz",
@@ -745,22 +746,18 @@
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     },
     "node_modules/@types/json-schema": {
-      "version": "7.0.12",
-      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.12.tgz",
-      "integrity": "sha512-Hr5Jfhc9eYOQNPYO5WLDq/n4jqijdHNlDXjuAQkkt+mWdQR+XJToOHrsD4cPaMXpn6KO7y2+wM8AZEs8VpBLVA==",
-      "dev": true
+      "version": "7.0.15",
+      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.15.tgz",
+      "integrity": "sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA==",
+      "dev": true,
+      "license": "MIT"
     },
     "node_modules/@types/lodash": {
-      "version": "4.14.196",
-      "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.14.196.tgz",
-      "integrity": "sha512-22y3o88f4a94mKljsZcanlNWPzO0uBsBdzLAngf2tp533LzZcQzb6+eZPJ+vCTt+bqF2XnvT9gejTLsAcJAJyQ==",
-      "dev": true
-    },
-    "node_modules/@types/minimatch": {
-      "version": "5.1.2",
-      "resolved": "https://registry.npmjs.org/@types/minimatch/-/minimatch-5.1.2.tgz",
-      "integrity": "sha512-K0VQKziLUWkVKiRVrx4a40iPaxTUefQmjtkQofBkYRcoaaL/8rhwDWww9qWbrgicNOgnpIsMxyNIUM4+n6dUIA==",
-      "dev": true
+      "version": "4.17.7",
+      "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.17.7.tgz",
+      "integrity": "sha512-8wTvZawATi/lsmNu10/j2hk1KEP0IvjubqPE3cu1Xz7xfXXt5oCq3SNUz4fMIP4XGF9Ky+Ue2tBA3hcS7LSBlA==",
+      "dev": true,
+      "license": "MIT"
     },
     "node_modules/@types/minimist": {
       "version": "1.2.2",
@@ -779,12 +776,6 @@
       "integrity": "sha512-Gj7cI7z+98M282Tqmp2K5EIsoouUEzbBJhQQzDE3jSIRk6r9gsz0oUokqIUR4u1R3dMHo0pDHM7sNOHyhulypw==",
       "dev": true
     },
-    "node_modules/@types/prettier": {
-      "version": "2.7.3",
-      "resolved": "https://registry.npmjs.org/@types/prettier/-/prettier-2.7.3.tgz",
-      "integrity": "sha512-+68kP9yzs4LMp7VNh8gdzMSPZFL44MLGqiHWvttYJe+6qnuVr4Ek9wSBQoveqY/r+LwjCcU29kNVkidwim+kYA==",
-      "dev": true
-    },
     "node_modules/@types/unist": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/@types/unist/-/unist-3.0.3.tgz",
@@ -870,12 +861,6 @@
         "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
     },
-    "node_modules/any-promise": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
-      "integrity": "sha512-7UvmKalWRt1wgjL1RrGxoSJW/0QZFIegpeGvZG9kjp8vrRu55XTHbwnqq2GpXm9uLbcuhxm3IqX9OB4MZR1b2A==",
-      "dev": true
-    },
     "node_modules/argparse": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
@@ -1046,12 +1031,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/call-me-maybe": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/call-me-maybe/-/call-me-maybe-1.0.2.tgz",
-      "integrity": "sha512-HpX65o1Hnr9HH25ojC1YGs7HCQLq0GCOibSaWER0eNpgJ/Z1MZv2mTc7+xh6WOPxbRVcmgbv4hGU+uSQ/2xFZQ==",
-      "dev": true
-    },
     "node_modules/callsites": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.1.0.tgz",
@@ -1167,22 +1146,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/cli-color": {
-      "version": "2.0.3",
-      "resolved": "https://registry.npmjs.org/cli-color/-/cli-color-2.0.3.tgz",
-      "integrity": "sha512-OkoZnxyC4ERN3zLzZaY9Emb7f/MhBOIpePv0Ycok0fJYT+Ouo00UBEIwsVsr0yoow++n5YWlSUgST9GKhNHiRQ==",
-      "dev": true,
-      "dependencies": {
-        "d": "^1.0.1",
-        "es5-ext": "^0.10.61",
-        "es6-iterator": "^2.0.3",
-        "memoizee": "^0.4.15",
-        "timers-ext": "^0.1.7"
-      },
-      "engines": {
-        "node": ">=0.10"
-      }
-    },
     "node_modules/cliui": {
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/cliui/-/cliui-8.0.1.tgz",
@@ -1316,16 +1279,6 @@
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-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/d/-/d-1.0.1.tgz",
-      "integrity": "sha512-m62ShEObQ39CfralilEQRjH6oAMtNCV1xJyEx5LpRYUVN+EviphDgUc/F3hnYbADmkiNs67Y+3ylmlG7Lnu+FA==",
-      "dev": true,
-      "dependencies": {
-        "es5-ext": "^0.10.50",
-        "type": "^1.0.1"
-      }
-    },
     "node_modules/debug": {
       "version": "4.3.4",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.4.tgz",
@@ -1551,54 +1504,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/es5-ext": {
-      "version": "0.10.62",
-      "resolved": "https://registry.npmjs.org/es5-ext/-/es5-ext-0.10.62.tgz",
-      "integrity": "sha512-BHLqn0klhEpnOKSrzn/Xsz2UIW8j+cGmo9JLzr8BiUapV8hPL9+FliFqjwr9ngW7jWdnxv6eO+/LqyhJVqgrjA==",
-      "dev": true,
-      "hasInstallScript": true,
-      "dependencies": {
-        "es6-iterator": "^2.0.3",
-        "es6-symbol": "^3.1.3",
-        "next-tick": "^1.1.0"
-      },
-      "engines": {
-        "node": ">=0.10"
-      }
-    },
-    "node_modules/es6-iterator": {
-      "version": "2.0.3",
-      "resolved": "https://registry.npmjs.org/es6-iterator/-/es6-iterator-2.0.3.tgz",
-      "integrity": "sha512-zw4SRzoUkd+cl+ZoE15A9o1oQd920Bb0iOJMQkQhl3jNc03YqVjAhG7scf9C5KWRU/R13Orf588uCC6525o02g==",
-      "dev": true,
-      "dependencies": {
-        "d": "1",
-        "es5-ext": "^0.10.35",
-        "es6-symbol": "^3.1.1"
-      }
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-    "node_modules/es6-symbol": {
-      "version": "3.1.3",
-      "resolved": "https://registry.npmjs.org/es6-symbol/-/es6-symbol-3.1.3.tgz",
-      "integrity": "sha512-NJ6Yn3FuDinBaBRWl/q5X/s4koRHBrgKAu+yGI6JCBeiu3qrcbJhwT2GeR/EXVfylRk8dpQVJoLEFhK+Mu31NA==",
-      "dev": true,
-      "dependencies": {
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-        "ext": "^1.1.2"
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-    "node_modules/es6-weak-map": {
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-      "resolved": "https://registry.npmjs.org/es6-weak-map/-/es6-weak-map-2.0.3.tgz",
-      "integrity": "sha512-p5um32HOTO1kP+w7PRnB+5lQ43Z6muuMuIMffvDN8ZB4GcnjLBV6zGStpbASIMk4DCAvEaamhe2zhyCb/QXXsA==",
-      "dev": true,
-      "dependencies": {
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-        "es5-ext": "^0.10.46",
-        "es6-iterator": "^2.0.3",
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@@ -1783,16 +1688,6 @@
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-    "node_modules/event-emitter": {
-      "version": "0.3.5",
-      "resolved": "https://registry.npmjs.org/event-emitter/-/event-emitter-0.3.5.tgz",
-      "integrity": "sha512-D9rRn9y7kLPnJ+hMq7S/nhvoKwwvVJahBi2BPmx3bvbsEdK3W9ii8cBSGjP+72/LnM4n6fo3+dkCX5FeTQruXA==",
-      "dev": true,
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@@ -1802,21 +1697,6 @@
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-      "resolved": "https://registry.npmjs.org/ext/-/ext-1.7.0.tgz",
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-      "dev": true,
-      "dependencies": {
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-      }
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-    "node_modules/ext/node_modules/type": {
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-      "dev": true
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@@ -2081,18 +1961,6 @@
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-      "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-8.0.0.tgz",
-      "integrity": "sha512-sY22aA6xchAzprjyqmSEQv4UbAAzRN0L2dQB0NlN5acTTK9Don6nhoc3eAbUnpZiCANAMfd/+40kVdKfFygohg==",
-      "dev": true,
-      "engines": {
-        "node": ">=10"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
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       "resolved": "https://registry.npmjs.org/get-symbol-description/-/get-symbol-description-1.0.0.tgz",
@@ -2621,12 +2489,6 @@
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-      "resolved": "https://registry.npmjs.org/is-promise/-/is-promise-2.2.2.tgz",
-      "integrity": "sha512-+lP4/6lKUBfQjZ2pdxThZvLUAafmZb8OAxFb8XXtiQmS35INgr85hdOGoEs124ez1FCnZJt6jau/T+alh58QFQ==",
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@@ -2797,97 +2659,27 @@
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-        "glob": "^7.1.6",
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+      "version": "15.0.2",
+      "resolved": "https://registry.npmjs.org/json-schema-to-typescript/-/json-schema-to-typescript-15.0.2.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@apidevtools/json-schema-ref-parser": "^11.5.5",
+        "@types/json-schema": "^7.0.15",
+        "@types/lodash": "^4.17.7",
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-        "mz": "^2.7.0",
-        "prettier": "^2.6.2"
+        "minimist": "^1.2.8",
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       "bin": {
         "json2ts": "dist/src/cli.js"
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-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
-      "integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==",
-      "dev": true,
-      "bin": {
-        "mkdirp": "bin/cmd.js"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
-    "node_modules/json-schema-to-typescript/node_modules/prettier": {
-      "version": "2.8.8",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.8.8.tgz",
-      "integrity": "sha512-tdN8qQGvNjw4CHbY+XXk0JgCXn9QiF21a55rBe5LJAU+kDyC4WQn4+awm2Xfk2lQMk5fKup9XgzTZtGkjBdP9Q==",
-      "dev": true,
-      "bin": {
-        "prettier": "bin-prettier.js"
-      },
-      "engines": {
-        "node": ">=10.13.0"
-      },
-      "funding": {
-        "url": "https://github.com/prettier/prettier?sponsor=1"
+        "node": ">=16.0.0"
       }
     },
     "node_modules/json-schema-traverse": {
@@ -2991,15 +2783,6 @@
       "dev": true,
       "license": "ISC"
     },
-    "node_modules/lru-queue": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/lru-queue/-/lru-queue-0.1.0.tgz",
-      "integrity": "sha512-BpdYkt9EvGl8OfWHDQPISVpcl5xZthb+XPsbELj5AQXxIC8IriDZIQYjBJPEm5rS420sjZ0TLEzRcq5KdBhYrQ==",
-      "dev": true,
-      "dependencies": {
-        "es5-ext": "~0.10.2"
-      }
-    },
     "node_modules/lunr": {
       "version": "2.3.9",
       "resolved": "https://registry.npmjs.org/lunr/-/lunr-2.3.9.tgz",
@@ -3058,22 +2841,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/memoizee": {
-      "version": "0.4.15",
-      "resolved": "https://registry.npmjs.org/memoizee/-/memoizee-0.4.15.tgz",
-      "integrity": "sha512-UBWmJpLZd5STPm7PMUlOw/TSy972M+z8gcyQ5veOnSDRREz/0bmpyTfKt3/51DhEBqCZQn1udM/5flcSPYhkdQ==",
-      "dev": true,
-      "dependencies": {
-        "d": "^1.0.1",
-        "es5-ext": "^0.10.53",
-        "es6-weak-map": "^2.0.3",
-        "event-emitter": "^0.3.5",
-        "is-promise": "^2.2.2",
-        "lru-queue": "^0.1.0",
-        "next-tick": "^1.1.0",
-        "timers-ext": "^0.1.7"
-      }
-    },
     "node_modules/memorystream": {
       "version": "0.3.1",
       "resolved": "https://registry.npmjs.org/memorystream/-/memorystream-0.3.1.tgz",
@@ -3237,10 +3004,11 @@
       }
     },
     "node_modules/minimist": {
-      "version": "1.2.7",
-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.7.tgz",
-      "integrity": "sha512-bzfL1YUZsP41gmu/qjrEk0Q6i2ix/cVeAhbCbqH9u3zYutS1cLg00qhrD0M2MVdCcx4Sc0UpP2eBWo9rotpq6g==",
+      "version": "1.2.8",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.8.tgz",
+      "integrity": "sha512-2yyAR8qBkN3YuheJanUpWC5U3bb5osDywNB8RzDVlDwDHbocAJveqqj1u8+SVD7jkWT4yvsHCpWqqWqAxb0zCA==",
       "dev": true,
+      "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/ljharb"
       }
@@ -3299,17 +3067,6 @@
       "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
       "dev": true
     },
-    "node_modules/mz": {
-      "version": "2.7.0",
-      "resolved": "https://registry.npmjs.org/mz/-/mz-2.7.0.tgz",
-      "integrity": "sha512-z81GNO7nnYMEhrGh9LeymoE4+Yr0Wn5McHIZMK5cfQCl+NDX08sCZgUc9/6MHni9IWuFLm1Z3HTCXu2z9fN62Q==",
-      "dev": true,
-      "dependencies": {
-        "any-promise": "^1.0.0",
-        "object-assign": "^4.0.1",
-        "thenify-all": "^1.0.0"
-      }
-    },
     "node_modules/nanoassert": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/nanoassert/-/nanoassert-2.0.0.tgz",
@@ -3335,12 +3092,6 @@
       "integrity": "sha512-9iN1ka/9zmX1ZvLV9ewJYEk9h7RyRRtqdK0woXcqohu8EWIerfPUjYJPg0ULy0UqP7cslmdGc8xKDJcojlKiaw==",
       "dev": true
     },
-    "node_modules/next-tick": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/next-tick/-/next-tick-1.1.0.tgz",
-      "integrity": "sha512-CXdUiJembsNjuToQvxayPZF9Vqht7hewsvy2sOWafLvi2awflj9mOC6bHIg50orX8IJvWKY9wYQ/zB2kogPslQ==",
-      "dev": true
-    },
     "node_modules/nice-try": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/nice-try/-/nice-try-1.0.5.tgz",
@@ -3586,15 +3337,6 @@
         "which": "bin/which"
       }
     },
-    "node_modules/object-assign": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
-      "integrity": "sha512-rJgTQnkUnH1sFw8yT6VSU3zD3sWmu6sZhIseY8VX+GRu3P6F7Fu+JNDoXfklElbLJSnc3FUQHVe4cU5hj+BcUg==",
-      "dev": true,
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
     "node_modules/object-inspect": {
       "version": "1.12.2",
       "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.12.2.tgz",
@@ -3893,10 +3635,11 @@
       }
     },
     "node_modules/prettier": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.0.0.tgz",
-      "integrity": "sha512-zBf5eHpwHOGPC47h0zrPyNn+eAEIdEzfywMoYn2XPi0P44Zp0tSq64rq0xAREh4auw2cJZHo9QUob+NqCQky4g==",
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.3.3.tgz",
+      "integrity": "sha512-i2tDNA0O5IrMO757lfrdQZCc2jPNDVntV0m/+4whiDfWaTKfMNgR7Qz0NAeGz/nRqF4m5/6CLzbP4/liHt12Ew==",
       "dev": true,
+      "license": "MIT",
       "bin": {
         "prettier": "bin/prettier.cjs"
       },
@@ -3908,10 +3651,11 @@
       }
     },
     "node_modules/protobufjs": {
-      "version": "7.2.5",
-      "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-7.2.5.tgz",
-      "integrity": "sha512-gGXRSXvxQ7UiPgfw8gevrfRWcTlSbOFg+p/N+JVJEK5VhueL2miT6qTymqAmjr1Q5WbOCyJbyrk6JfWKwlFn6A==",
+      "version": "7.4.0",
+      "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-7.4.0.tgz",
+      "integrity": "sha512-mRUWCc3KUU4w1jU8sGxICXH/gNS94DvI1gxqDvBzhj1JpcsimQkYiOJfwsPUykUI5ZaspFbSgmBLER8IrQ3tqw==",
       "hasInstallScript": true,
+      "license": "BSD-3-Clause",
       "dependencies": {
         "@protobufjs/aspromise": "^1.1.2",
         "@protobufjs/base64": "^1.1.2",
@@ -4903,43 +4647,12 @@
       "integrity": "sha512-N+8UisAXDGk8PFXP4HAzVR9nbfmVJ3zYLAWiTIoqC5v5isinhr+r5uaO8+7r3BMfuNIufIsA7RdpVgacC2cSpw==",
       "dev": true
     },
-    "node_modules/thenify": {
-      "version": "3.3.1",
-      "resolved": "https://registry.npmjs.org/thenify/-/thenify-3.3.1.tgz",
-      "integrity": "sha512-RVZSIV5IG10Hk3enotrhvz0T9em6cyHBLkH/YAZuKqd8hRkKhSfCGIcP2KUY0EPxndzANBmNllzWPwak+bheSw==",
-      "dev": true,
-      "dependencies": {
-        "any-promise": "^1.0.0"
-      }
-    },
-    "node_modules/thenify-all": {
-      "version": "1.6.0",
-      "resolved": "https://registry.npmjs.org/thenify-all/-/thenify-all-1.6.0.tgz",
-      "integrity": "sha512-RNxQH/qI8/t3thXJDwcstUO4zeqo64+Uy/+sNVRBx4Xn2OX+OZ9oP+iJnNFqplFra2ZUVeKCSa2oVWi3T4uVmA==",
-      "dev": true,
-      "dependencies": {
-        "thenify": ">= 3.1.0 < 4"
-      },
-      "engines": {
-        "node": ">=0.8"
-      }
-    },
     "node_modules/timeout-refresh": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/timeout-refresh/-/timeout-refresh-2.0.1.tgz",
       "integrity": "sha512-SVqEcMZBsZF9mA78rjzCrYrUs37LMJk3ShZ851ygZYW1cMeIjs9mL57KO6Iv5mmjSQnOe/29/VAfGXo+oRCiVw==",
       "dev": true
     },
-    "node_modules/timers-ext": {
-      "version": "0.1.7",
-      "resolved": "https://registry.npmjs.org/timers-ext/-/timers-ext-0.1.7.tgz",
-      "integrity": "sha512-b85NUNzTSdodShTIbky6ZF02e8STtVVfD+fu4aXXShEELpozH+bCpJLYMPZbsABN2wDH7fJpqIoXxJpzbf0NqQ==",
-      "dev": true,
-      "dependencies": {
-        "es5-ext": "~0.10.46",
-        "next-tick": "1"
-      }
-    },
     "node_modules/to-regex-range": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
@@ -5005,12 +4718,6 @@
         "protobufjs": "^7.2.4"
       }
     },
-    "node_modules/type": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/type/-/type-1.2.0.tgz",
-      "integrity": "sha512-+5nt5AAniqsCnu2cEQQdpzCAh33kVx8n0VoFidKpB1dVVLAN/F+bgVOqOJqOnEnrhp222clB5p3vUlD+1QAnfg==",
-      "dev": true
-    },
     "node_modules/type-check": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
diff --git a/package.json b/package.json
index 960b456..ef6722e 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "eslint": "^8.46.0",
     "glob": "^10.3.3",
     "hypercore": "^10.4.1",
-    "json-schema-to-typescript": "^13.0.2",
+    "json-schema-to-typescript": "^15.0.2",
     "mkdirp": "^3.0.1",
     "npm-run-all": "^4.1.5",
     "prettier": "^3.0.0",
@@ -57,6 +57,7 @@
     "typescript": "^5.5.4"
   },
   "dependencies": {
+    "@comapeo/geometry": "^1.0.1",
     "compact-encoding": "^2.12.0",
     "protobufjs": "^7.2.5",
     "type-fest": "^4.26.0"
diff --git a/proto/geometry/stub.proto b/proto/geometry/stub.proto
new file mode 100644
index 0000000..23800ba
--- /dev/null
+++ b/proto/geometry/stub.proto
@@ -0,0 +1,7 @@
+syntax = "proto3";
+package mapeo;
+
+// stub to keep buf happy. ts-proto replaces this with
+// the decoder/encoder from @comapeo/geometry
+
+message Geometry {}
diff --git a/proto/remoteDetectionAlert/v1.proto b/proto/remoteDetectionAlert/v1.proto
new file mode 100644
index 0000000..ee2e440
--- /dev/null
+++ b/proto/remoteDetectionAlert/v1.proto
@@ -0,0 +1,22 @@
+syntax = "proto3";
+package mapeo;
+
+import "common/v1.proto";
+import "geometry/stub.proto";
+import "google/protobuf/timestamp.proto";
+import "options.proto";
+import "tags/v1.proto";
+
+message RemoteDetectionAlert_1 {
+  // **DO NOT CHANGE dataTypeId** generated with `openssl rand -hex 6`
+  option (dataTypeId) = "33a966ee6c90";
+  option (schemaName) = "remoteDetectionAlert";
+
+  Common_1 common = 1;
+
+  google.protobuf.Timestamp detectionDateStart = 2 [(required) = true];
+  google.protobuf.Timestamp detectionDateEnd = 3 [(required) = true];
+  string sourceId = 4;
+  Geometry geometry = 5;
+  map<string, TagValue_1> metadata = 6;
+}
diff --git a/schema/remoteDetectionAlert/v1.json b/schema/remoteDetectionAlert/v1.json
new file mode 100644
index 0000000..0f487da
--- /dev/null
+++ b/schema/remoteDetectionAlert/v1.json
@@ -0,0 +1,80 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$id": "http://mapeo.world/schemas/remoteDetectionAlert/v1.json",
+  "title": "RemoteDetectionAlert",
+  "description": "A remote detection alert is a type of element in the map that relates to an alert (regarding an urgent event that happened on the territory)",
+  "type": "object",
+  "properties": {
+    "schemaName": {
+      "description": "Must be `remoteDetectionAlert`",
+      "type": "string",
+      "const": "remoteDetectionAlert"
+    },
+    "detectionDateStart": {
+      "type": "string",
+      "format": "date-time",
+      "description": "Timestamp of when the detected alert started"
+    },
+    "detectionDateEnd": {
+      "type": "string",
+      "format": "date-time",
+      "description": "Timestamp of when the detected alert ended"
+    },
+    "sourceId": {
+      "type": "string",
+      "description": "unique string identifiying this alert, different from the `docId`"
+    },
+    "metadata": {
+      "type": "object",
+      "description": "Additional metadata related to this alert. It is a map from a string to any element (including lists)",
+      "properties": {},
+      "additionalProperties": {
+        "anyOf": [
+          {
+            "type": "boolean"
+          },
+          {
+            "type": "number"
+          },
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          },
+          {
+            "type": "array",
+            "items": {
+              "anyOf": [
+                {
+                  "type": "boolean"
+                },
+                {
+                  "type": "number"
+                },
+                {
+                  "type": "string"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            }
+          }
+        ]
+      }
+    },
+    "geometry": {
+      "$ref": "http://comapeo.app/schemas/shared/geometry.json"
+    }
+  },
+  "required": [
+    "schemaName",
+    "detectionDateStart",
+    "detectionDateEnd",
+    "sourceId",
+    "metadata",
+    "geometry"
+  ],
+  "additionalProperties": false
+}
diff --git a/scripts/lib/generate-jsonschema-exports.js b/scripts/lib/generate-jsonschema-exports.js
index 2fa8fd0..96255d4 100644
--- a/scripts/lib/generate-jsonschema-exports.js
+++ b/scripts/lib/generate-jsonschema-exports.js
@@ -1,5 +1,8 @@
 // @ts-check
 import { default as _ } from '@json-schema-tools/dereferencer'
+import { createRequire } from 'module'
+const require = createRequire(import.meta.url)
+const GeometryJSONSchema = require('@comapeo/geometry/json/geometry.json')
 
 // Dereferencer's exports are all wrong for ESM imports
 /** @type {any} */
@@ -28,7 +31,12 @@ export async function generateJSONSchemaExports(jsonSchemas) {
     const dereferencer = new JsonSchemaDereferencer(
       // Need to create a deep clone to avoid issue described in https://github.com/digidem/mapeo-schema/issues/109
       JSON.parse(JSON.stringify(jsonSchema)),
-      { mutate: false }
+      {
+        mutate: false,
+        refCache: {
+          [GeometryJSONSchema.$id]: GeometryJSONSchema,
+        },
+      }
     )
     dereferencedDocSchemas[schemaName] = await dereferencer.resolve()
   }
diff --git a/scripts/lib/generate-jsonschema-ts.js b/scripts/lib/generate-jsonschema-ts.js
index 1c1e3e1..ed6fcb6 100644
--- a/scripts/lib/generate-jsonschema-ts.js
+++ b/scripts/lib/generate-jsonschema-ts.js
@@ -1,6 +1,12 @@
 // @ts-check
 import { compile } from 'json-schema-to-typescript'
 import { capitalize } from './utils.js'
+import { createRequire } from 'module'
+
+const require = createRequire(import.meta.url)
+const GeometryJSONSchema = require('@comapeo/geometry/json/geometry.json')
+
+/** @import { ResolverOptions, JSONSchema } from '@apidevtools/json-schema-ref-parser' */
 
 /**
  * Returns generated typescript definitions for JSONSchemas
@@ -16,6 +22,12 @@ export async function generateJSONSchemaTS(config, jsonSchemas) {
     const ts = await compile(jsonSchema, capitalize(schemaName), {
       additionalProperties: false,
       unknownAny: false,
+      $refOptions: {
+        resolve: {
+          http: false,
+          geometry: geometryResolver,
+        },
+      },
     })
     typescriptDefs[schemaName] = ts
   }
@@ -84,3 +96,14 @@ function getValueName(schemaName) {
     ? 'MapeoCommon'
     : capitalize(schemaName) + 'Value'
 }
+
+/** @type {ResolverOptions<JSONSchema>} */
+const geometryResolver = {
+  order: 1,
+  canRead(file) {
+    return file.url === GeometryJSONSchema.$id
+  },
+  read() {
+    return GeometryJSONSchema
+  },
+}
diff --git a/scripts/lib/generate-validations.js b/scripts/lib/generate-validations.js
index d504632..b3181ba 100644
--- a/scripts/lib/generate-validations.js
+++ b/scripts/lib/generate-validations.js
@@ -1,6 +1,10 @@
 // @ts-check
 import Ajv from 'ajv'
 import standaloneCode from 'ajv/dist/standalone/index.js'
+import { createRequire } from 'module'
+
+const require = createRequire(import.meta.url)
+const GeometryJSONSchema = require('@comapeo/geometry/json/geometry.json')
 
 const ucs2lengthCode = 'require("ajv/dist/runtime/ucs2length").default'
 
@@ -25,7 +29,7 @@ export function generateValidations(config, jsonSchemas) {
     code: { source: true, esm: true },
     formats: { 'date-time': true },
   })
-  ajv.addKeyword('meta:enum')
+  ajv.addKeyword('meta:enum').addSchema(GeometryJSONSchema)
 
   // generate validation code
   return [
diff --git a/scripts/lib/parse-config.js b/scripts/lib/parse-config.js
index a909cf7..2a7da67 100644
--- a/scripts/lib/parse-config.js
+++ b/scripts/lib/parse-config.js
@@ -6,7 +6,7 @@ import schema from 'protocol-buffers-schema'
 import { capitalize, PROJECT_ROOT } from './utils.js'
 
 // These messages are embedded in others and do not define Mapeo data types
-const EMBEDDED_MESSAGES = ['tags', 'common', 'versionId']
+const EMBEDDED_MESSAGES = ['tags', 'common', 'versionId', 'geometry']
 
 // We avoid creating data type IDs that match these, since blobs (e.g. icons)
 // can be stored in Mapeo hypercores, and we want to avoid trying to parse a
diff --git a/src/decode.ts b/src/decode.ts
index c35043d..dcd607a 100644
--- a/src/decode.ts
+++ b/src/decode.ts
@@ -20,6 +20,7 @@ import {
   convertIcon,
   convertTranslation,
   convertTrack,
+  convertRemoteDetectionAlert,
 } from './lib/decode-conversions.js'
 import cenc from 'compact-encoding'
 import { DATA_TYPE_ID_BYTES, SCHEMA_VERSION_BYTES } from './constants.js'
@@ -80,6 +81,8 @@ export function decode(
       return convertTranslation(message, versionObj)
     case 'track':
       return convertTrack(message, versionObj)
+    case 'remoteDetectionAlert':
+      return convertRemoteDetectionAlert(message, versionObj)
     default:
       throw new ExhaustivenessError(message)
   }
diff --git a/src/encode.ts b/src/encode.ts
index 21d31ba..45ae336 100644
--- a/src/encode.ts
+++ b/src/encode.ts
@@ -18,6 +18,7 @@ import {
   convertIcon,
   convertTranslation,
   convertTrack,
+  convertRemoteDetectionAlert,
 } from './lib/encode-conversions.js'
 import { ExhaustivenessError } from './lib/utils.js'
 
@@ -86,6 +87,12 @@ export function encode(mapeoDoc: MapeoDocEncode): Buffer {
       protobuf = Encode[mapeoDoc.schemaName](message).finish()
       break
     }
+    case 'remoteDetectionAlert': {
+      const message = convertRemoteDetectionAlert(mapeoDoc)
+      protobuf = Encode[mapeoDoc.schemaName](message).finish()
+      break
+    }
+
     default:
       throw new ExhaustivenessError(mapeoDoc)
   }
diff --git a/src/lib/decode-conversions.ts b/src/lib/decode-conversions.ts
index 601d496..4737c59 100644
--- a/src/lib/decode-conversions.ts
+++ b/src/lib/decode-conversions.ts
@@ -343,6 +343,30 @@ export const convertTrack: ConvertFunction<'track'> = (message, versionObj) => {
   }
 }
 
+export const convertRemoteDetectionAlert: ConvertFunction<
+  'remoteDetectionAlert'
+> = (message, versionObj) => {
+  const { common, schemaVersion, ...rest } = message
+  const jsonSchemaCommon = convertCommon(common, versionObj)
+  if (!rest.detectionDateStart) {
+    throw new Error('missing required detectionDateStart')
+  }
+  if (!rest.detectionDateEnd) {
+    throw new Error('missing required detectionDateEnd')
+  }
+  if (!rest.geometry) {
+    throw new Error('missing required geometry')
+  }
+  return {
+    ...jsonSchemaCommon,
+    ...rest,
+    detectionDateStart: rest.detectionDateStart,
+    detectionDateEnd: rest.detectionDateEnd,
+    metadata: convertTags(rest.metadata),
+    geometry: rest.geometry,
+  }
+}
+
 function convertIconVariant(
   variant: Icon_1_IconVariant
 ): Icon['variants'][number] {
diff --git a/src/lib/encode-conversions.ts b/src/lib/encode-conversions.ts
index def3e42..afbc4bb 100644
--- a/src/lib/encode-conversions.ts
+++ b/src/lib/encode-conversions.ts
@@ -229,6 +229,17 @@ export const convertTrack: ConvertFunction<'track'> = (mapeoDoc) => {
   return track
 }
 
+export const convertRemoteDetectionAlert: ConvertFunction<
+  'remoteDetectionAlert'
+> = (mapeoDoc) => {
+  // TODO: should we add a check for sourceId? (so that it complies with the id format we expect?)
+  return {
+    common: convertCommon(mapeoDoc),
+    ...mapeoDoc,
+    metadata: convertTags(mapeoDoc.metadata),
+  }
+}
+
 function convertCommon(
   common: SetOptional<MapeoCommon, 'versionId' | 'originalVersionId'>
 ): ProtoTypesWithSchemaInfo['common'] {
diff --git a/src/types.ts b/src/types.ts
index 90b649c..4b0fc2c 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -20,6 +20,7 @@ type SupportedSchemaNames =
   | 'coreOwnership'
   | 'translation'
   | 'track'
+  | 'remoteDetectionAlert'
 
 export type SchemaName = Extract<keyof typeof dataTypeIds, SupportedSchemaNames>
 export type SchemaNameAll = keyof typeof dataTypeIds
diff --git a/test/fixtures/bad-docs.js b/test/fixtures/bad-docs.js
index f569371..7f1b4a7 100644
--- a/test/fixtures/bad-docs.js
+++ b/test/fixtures/bad-docs.js
@@ -139,4 +139,18 @@ export const badDocs = [
       color: '#ff00g1',
     },
   },
+  {
+    text: 'remoteDetectionAlert with missing elements',
+    doc: {
+      docId: cachedValues.docId,
+      versionId: cachedValues.versionId,
+      originalVersionId: cachedValues.versionId,
+      schemaName: 'remoteDetectionAlert',
+      createdAt: cachedValues.createdAt,
+      updatedAt: cachedValues.updatedAt,
+      links: [],
+      deleted: false,
+      sourceId: '',
+    },
+  },
 ]
diff --git a/test/fixtures/good-docs-completed.js b/test/fixtures/good-docs-completed.js
index 0aa08ce..f9d8c99 100644
--- a/test/fixtures/good-docs-completed.js
+++ b/test/fixtures/good-docs-completed.js
@@ -332,4 +332,25 @@ export const goodDocsCompleted = [
     },
     expected: {},
   },
+  {
+    doc: {
+      docId: cachedValues.docId,
+      versionId: cachedValues.versionId,
+      originalVersionId: cachedValues.originalVersionId,
+      schemaName: 'remoteDetectionAlert',
+      createdAt: cachedValues.createdAt,
+      updatedAt: cachedValues.updatedAt,
+      links: [],
+      deleted: false,
+      sourceId: cachedValues.docId,
+      detectionDateStart: cachedValues.createdAt,
+      detectionDateEnd: cachedValues.updatedAt,
+      geometry: {
+        type: 'Point',
+        coordinates: [100, 101],
+      },
+      metadata: {},
+    },
+    expected: {},
+  },
 ]
diff --git a/test/fixtures/good-docs-minimal.js b/test/fixtures/good-docs-minimal.js
index cc1de59..a8870f2 100644
--- a/test/fixtures/good-docs-minimal.js
+++ b/test/fixtures/good-docs-minimal.js
@@ -205,4 +205,54 @@ export const goodDocsMinimal = [
     },
     expected: {},
   },
+  {
+    doc: {
+      docId: cachedValues.docId,
+      versionId: cachedValues.versionId,
+      originalVersionId: cachedValues.originalVersionId,
+      schemaName: 'remoteDetectionAlert',
+      createdAt: cachedValues.createdAt,
+      updatedAt: cachedValues.updatedAt,
+      links: [],
+      deleted: false,
+      sourceId: '',
+      detectionDateStart: cachedValues.createdAt,
+      detectionDateEnd: cachedValues.updatedAt,
+      geometry: {
+        type: 'Point',
+        coordinates: [100, 101],
+      },
+      metadata: {},
+    },
+    expected: {},
+  },
+  {
+    doc: {
+      docId: cachedValues.docId,
+      versionId: cachedValues.versionId,
+      originalVersionId: cachedValues.originalVersionId,
+      schemaName: 'remoteDetectionAlert',
+      createdAt: cachedValues.createdAt,
+      updatedAt: cachedValues.updatedAt,
+      links: [],
+      deleted: false,
+      sourceId: '',
+      detectionDateStart: cachedValues.createdAt,
+      detectionDateEnd: cachedValues.updatedAt,
+      geometry: {
+        type: 'Polygon',
+        coordinates: [
+          [
+            [100.0, 0.0],
+            [101.0, 0.0],
+            [101.0, 1.0],
+            [100.0, 1.0],
+            [100.0, 0.0],
+          ],
+        ],
+      },
+      metadata: {},
+    },
+    expected: {},
+  },
 ]