{
 "id": "event/meridian-degree-sinjar-827",
 "class": "event",
 "slug": "meridian-degree-sinjar-827",
 "label": {
  "ar": "قياس درجة الطول بسنجار",
  "en": "The meridian measurement at Sinjār"
 },
 "summary": {
  "ar": "شارك الخوارزمي في مشروع المأمون لقياس محيط الأرض بقياس طول درجة واحدة من خط الطول في سهل سنجار بالعراق، والأرض كروية معلومة من قديم {cite:britannica-al-khwarizmi}.",
  "en": "Al-Khwārizmī joined al-Maʾmūn's project to fix the Earth's circumference by measuring the length of one degree of meridian across the plain of Sinjār in Iraq {cite:britannica-al-khwarizmi}.",
  "ur": "خوارزمی المأمون کی اس مہم میں شریک ہوا جس میں عراق کے سنجار کے میدان میں طول البلد کی ایک ڈگری ناپ کر زمین کا محیط معلوم کیا گیا {cite:britannica-al-khwarizmi}."
 },
 "stub": false,
 "wings": [
  "time"
 ],
 "regions": [
  "persia-central-asia"
 ],
 "periods": [
  "period/abbasid-early"
 ],
 "tags": [],
 "aliases": [],
 "themes": [],
 "span": {
  "earliest": 827.0004859784938,
  "latest": 827.9998220360128
 },
 "display": {
  "start": {
   "edtf": "0827~",
   "precision": "year",
   "status": "historical",
   "derived": true,
   "note": "al-Maʾmūn-era project; year approximate"
  },
  "end": {
   "edtf": "0827~",
   "precision": "year",
   "status": "historical",
   "derived": true,
   "note": "al-Maʾmūn-era project; year approximate"
  }
 },
 "data": {
  "kind": "discovery",
  "date": {
   "start": {
    "edtf": "0827~",
    "precision": "year",
    "status": "historical",
    "derived": true,
    "note": "al-Maʾmūn-era project; year approximate"
   },
   "end": {
    "edtf": "0827~",
    "precision": "year",
    "status": "historical",
    "derived": true,
    "note": "al-Maʾmūn-era project; year approximate"
   }
  },
  "sources": [
   "source/britannica-al-khwarizmi"
  ],
  "provenance": {
   "layer": "own-research",
   "source": "written for the Timeline Explorer al-Khwarizmi story from the cited source",
   "generated_by": "Devin (SWE-2 Medium)",
   "run": "explorer-al-khwarizmi"
  },
  "status": {
   "review": "draft",
   "completeness": 2,
   "generated_by": "Devin (SWE-2 Medium)"
  }
 },
 "prose": {},
 "degree": 4,
 "contemporaries": [],
 "updated": "2026-10-28",
 "connections": [
  {
   "to": "person/al-khwarizmi",
   "type": "had_participant",
   "inverse": true,
   "role": "العالم المشارك",
   "sources": [
    "source/britannica-al-khwarizmi"
   ]
  },
  {
   "to": "place/sinjar",
   "type": "occurred_at",
   "inverse": false,
   "sources": [
    "source/britannica-al-khwarizmi"
   ]
  }
 ],
 "related": [
  "event/kitab-al-jabr-composed-820",
  "event/sayf-al-din-sinjar-573",
  "event/sinjar-flood-511",
  "event/surat-al-ard-composed-833",
  "place/baghdad",
  "person/al-khwarizmi",
  "place/sinjar"
 ],
 "license": {
  "prose": "CC BY-SA 4.0",
  "data": "CC0 1.0"
 }
}