{"author_name":"sakaik","type":"rich","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/s/sakaik/20260222/20260222120218.png","description":"MySQL\u306bSpatial(GIS)\u95a2\u6570\u3092\u8ffd\u52a0\u3057\u3066\u3044\u307e\u3059\uff08\u30d7\u30e9\u30b0\u30a4\u30f3\u3068\u3057\u3066\uff09\u3002\u3072\u3068\u3064\u3072\u3068\u3064\u306e\u95a2\u6570\u3092\u52d5\u4f5c\u78ba\u8a8d\u3057\u3064\u3064\u7d39\u4ecb\u3059\u308b\u30b7\u30ea\u30fc\u30ba\u3002\u3072\u3068\u3064\u524d\u306b\u7d9a\u3044\u3066\u3001\u89d2\u5ea6\u95a2\u4fc2\u3067\u3059\u3002 STX_Angle(p1, p2, p3) 3\u3064\u306ePOINT\u3092\u4e0e\u3048\u3066\u305d\u308c\u304c\u70ba\u3059\u89d2\uff08p1-p2-p3)\u306e\u89d2\u5ea6\u3092\u6c42\u3081\u307e\u3059\u3002\u623b\u308a\u5024\u306f\u30e9\u30b8\u30a2\u30f3\u3002PostGIS\u306b\u5023\u3044\u3001\u672c\u95a2\u6570\u306f\u4e0e\u3048\u3089\u308c\u305f\u5ea7\u6a19\u3092\u5e73\u9762\u3068\u3057\u3066\u6271\u3044\u307e\u3059\u3002\u307e\u305f\u3001PostGIS\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u300c4\u3064\u306ePOINT\u3092\u4e0e\u3048\u308b\u6a5f\u80fd\u300d\u300c2\u3064\u306eLINESTRING\u3092\u4e0e\u3048\u308b\u6a5f\u80fd\u300d\u306f\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u305b\u3093\uff08\u8981\u671b\u304c\u3042\u3063\u305f\u3089\u8003\u3048\u307e\u3059\uff09\u3002 \u89d2\u5ea6\u306fp1\u304b\u3089p2\u3092\u7d4c\u7531\u3057\u3066p3\u306b\u5411\u304b\u3046 p2\u306b\u304a\u3051\u308b\u89d2\u5ea6\u3092\u3001\u300c\u53cd\u6642\u8a08\u56de\u308a\u2026","blog_url":"https://sakaik.hateblo.jp/","version":"1.0","width":"100%","title":" MySQL GIS\u62e1\u5f35\u95a2\u6570\uff1a STX_Angle()","categories":["mysql","gis","spatial","newfunc"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsakaik.hateblo.jp%2Fentry%2F20260222%2FSTX_Angle_func\" title=\" MySQL GIS\u62e1\u5f35\u95a2\u6570\uff1a STX_Angle() - sakaik\u306e\u65e5\u3005\u96d1\u611f\uff5e(T)\u7de8\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/sakaik/","url":"https://sakaik.hateblo.jp/entry/20260222/STX_Angle_func","published":"2026-02-22 12:16:45","blog_title":"sakaik\u306e\u65e5\u3005\u96d1\u611f\uff5e(T)\u7de8","height":"190"}