{"id":4174,"date":"2026-09-28T09:59:15","date_gmt":"2026-09-28T00:59:15","guid":{"rendered":"https:\/\/y42u.net\/tec001\/2026\/09\/28\/longest-straight-road-earth-curvature-field\/"},"modified":"2026-09-28T09:59:15","modified_gmt":"2026-09-28T00:59:15","slug":"longest-straight-road-earth-curvature-field","status":"publish","type":"post","link":"https:\/\/y42u.net\/tec001\/2026\/09\/28\/longest-straight-road-earth-curvature-field\/","title":{"rendered":"\u65e5\u672c\u4e00\u9577\u3044\u76f4\u7dda\u9053\u8def\u306f\u672c\u5f53\u306b\u307e\u3063\u3059\u3050\uff1f \u2014 29km\u3067\u5730\u7403\u306e\u4e38\u307f\u304c66m\u30011km\u5148\u306e\u9ad8\u3055\u304c7cm\u305a\u308c\u308b\u7406\u7531"},"content":{"rendered":"<style>img.autopost-single-image{width:30%;max-width:100%;height:auto;display:block;}@media (max-width: 768px){img.autopost-single-image{width:50%;}}<\/style>\n<p><img decoding=\"async\" style=\"width:80%;max-width:100%;height:auto;display:block;margin:0 auto;\" src=\"https:\/\/y42u.net\/tec001\/wp-content\/uploads\/2026\/09\/gde-longest-straight-road-earth-curvature-field.jpeg\" alt=\"\u65e5\u672c\u4e00\u9577\u3044\u76f4\u7dda\u9053\u8def\u306f\u672c\u5f53\u306b\u307e\u3063\u3059\u3050\uff1f \u2014 29km\u3067\u5730\u7403\u306e\u4e38\u307f\u304c66m\u30011km\u5148\u306e\u9ad8\u3055\u304c7cm\u305a\u308c\u308b\u7406\u7531\"><\/p>\n<h1 id=\"29km66m1km7cm\">\u65e5\u672c\u4e00\u9577\u3044\u76f4\u7dda\u9053\u8def\u306f\u672c\u5f53\u306b\u307e\u3063\u3059\u3050\uff1f \u2014 29km\u3067\u5730\u7403\u306e\u4e38\u307f\u304c66m\u30011km\u5148\u306e\u9ad8\u3055\u304c7cm\u305a\u308c\u308b\u7406\u7531<\/h1>\n<p>\u307e\u3063\u3059\u3050\u306b\u898b\u3048\u308b\u9053\u8def\u306f\u3001\u5e7e\u4f55\u5b66\u7684\u306a\u76f4\u7dda\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5317\u6d77\u9053\u306e\u56fd\u905312\u53f7\u306e\u76f4\u7dda\u533a\u9593\uff08\u7d0429km\uff09\u30921\u679a\u306e\u5e73\u3089\u306a\u677f\u3067\u8986\u3046\u3068\u3001\u7aef\u3067\u306f\u5730\u8868\u304c\u677f\u304b\u3089<strong>\u7d0466m<\/strong>\u4e0b\u3078\u96e2\u308c\u307e\u3059\u3002\u9053\u8def\u304c\u6c34\u5e73\u306b\u898b\u3048\u308b\u306e\u306f\u3001\u6c34\u5e73\u305d\u306e\u3082\u306e\u304c\u5730\u7403\u306b\u6cbf\u3063\u3066\u66f2\u304c\u3063\u3066\u3044\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n<h2 id=\"_1\">\u65e5\u672c\u4e00\u9577\u3044\u76f4\u7dda\u9053\u8def\u306f\u3069\u3053\u304b<\/h2>\n<p>\u56fd\u571f\u4ea4\u901a\u7701\u300c\u9053\u306e\u76f8\u8ac7\u5ba4\u300d\u306e\u516c\u8868\u3067\u306f\u3001\u56fd\u9053\u3067\u3044\u3061\u3070\u3093\u9577\u3044\u76f4\u7dda\u306f<strong>\u56fd\u905312\u53f7\u306e\u300c\u7f8e\u5504\u5e02\u5149\u73e0\u5185\u753a292\u300d\u304b\u3089\u300c\u6edd\u5ddd\u5e02\u65b0\u753a6\u4e01\u76ee\u300d\u307e\u3067\u3001\u5ef6\u9577\u7d0429km<\/strong>\u3067\u3059\uff082026\u5e749\u6708\u6642\u70b9\u3067\u78ba\u8a8d\uff09\u3002\u7d39\u4ecb\u8a18\u4e8b\u3067\u306f29.2km\u3068\u66f8\u304b\u308c\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u533a\u9593\u306e\u3068\u308a\u65b9\u3067\u7aef\u6570\u304c\u5909\u308f\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e21\u7aef\u306b\u8fd1\u30442\u3064\u306e\u753a\u306e\u4ee3\u8868\u70b9\u306b\u3064\u3044\u3066\u3001\u4f4d\u7f6e\u3068\u6a19\u9ad8\u3092\u56fd\u571f\u5730\u7406\u9662\u306e\u30c7\u30fc\u30bf\u3067\u7167\u4f1a\u3057\u307e\u3057\u305f\uff082026\u5e749\u6708\u6642\u70b9\uff09\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u5730\u70b9\uff08\u753a\u306e\u4ee3\u8868\u70b9\uff09<\/th>\n<th>\u7def\u5ea6<\/th>\n<th>\u7d4c\u5ea6<\/th>\n<th>\u6a19\u9ad8<\/th>\n<th>\u6a19\u9ad8\u306e\u51fa\u3069\u3053\u308d<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u5317\u6d77\u9053\u7f8e\u5504\u5e02\u5149\u73e0\u5185\u753a<\/td>\n<td>43.279774<\/td>\n<td>141.832062<\/td>\n<td>23.3 m<\/td>\n<td>5m\u30e1\u30c3\u30b7\u30e5\uff08\u30ec\u30fc\u30b6\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u5317\u6d77\u9053\u6edd\u5ddd\u5e02\u65b0\u753a<\/td>\n<td>43.553410<\/td>\n<td>141.913925<\/td>\n<td>28.0 m<\/td>\n<td>5m\u30e1\u30c3\u30b7\u30e5\uff08\u30ec\u30fc\u30b6\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li>\u4ee3\u8868\u70b9\u3069\u3046\u3057\u306e\u8ddd\u96e2\uff08GRS80\u6955\u5186\u4f53\u4e0a\u306e\u6e2c\u5730\u7dda\uff09\u306f <strong>31.12km<\/strong>\u3002\u516c\u8868\u5024\u306e\u7d0429km\u3088\u308a\u9577\u3044\u306e\u306f\u3001\u4ee3\u8868\u70b9\u304c\u753a\u306e\u4ee3\u8868\u3067\u3042\u3063\u3066\u76f4\u7dda\u533a\u9593\u306e\u7aef\u70b9\u305d\u306e\u3082\u306e\u3067\u306f\u306a\u3044\u305f\u3081\u3067\u3059<\/li>\n<li><strong>\u6a19\u9ad8\u5dee\u306f\u308f\u305a\u304b4.7m<\/strong>\u300229km\u30674.7m\u306a\u3089\u52fe\u914d\u306f0.016%\u3067\u3001\u8d70\u3063\u3066\u3044\u3066\u5742\u3068\u306f\u611f\u3058\u306a\u3044\u7bc4\u56f2\u3067\u3059<\/li>\n<\/ul>\n<h2 id=\"3\">\u300c\u307e\u3063\u3059\u3050\u300d\u306b\u306f3\u3064\u3042\u308b<\/h2>\n<p>\u540c\u30582\u70b9\u3092\u7d50\u3076\u306e\u306b\u3001\u6e2c\u91cf\u3067\u306f\u5c11\u306a\u304f\u3068\u30823\u901a\u308a\u306e\u300c\u307e\u3063\u3059\u3050\u300d\u304c\u3042\u308a\u307e\u3059\u3002\u5dee\u306f29km\u3068\u3044\u3046\u9577\u3055\u3067\u521d\u3081\u3066\u76ee\u306b\u898b\u3048\u308b\u5927\u304d\u3055\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u8a00\u3044\u65b9<\/th>\n<th>\u4f55\u306b\u6cbf\u3063\u305f\u7dda\u304b<\/th>\n<th>29km\u3067\u306e\u5dee<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u5f26\uff08\u5e7e\u4f55\u5b66\u7684\u306a\u76f4\u7dda\uff09<\/td>\n<td>2\u70b9\u3092\u6700\u77ed\u3067\u7d50\u3076\u7a7a\u9593\u306e\u76f4\u7dda\u3002\u9014\u4e2d\u306f\u5730\u9762\u3088\u308a\u4e0b\u3092\u901a\u308b<\/td>\n<td>\u4e2d\u592e\u3067\u5730\u8868\u3088\u308a<strong>\u7d0416.5m\u4e0b<\/strong><\/td>\n<\/tr>\n<tr>\n<td>\u6c34\u5e73\uff08\u6c34\u6e96\u9762\uff09<\/td>\n<td>\u925b\u76f4\u7dda\u306b\u76f4\u4ea4\u3059\u308b\u9762\u3002\u30b8\u30aa\u30a4\u30c9\u306b\u5e73\u884c\u3067\u3001\u5730\u7403\u306b\u6cbf\u3063\u3066\u66f2\u304c\u308b<\/td>\n<td>\u9053\u8def\u3084\u6c34\u9762\u306f\u3053\u3061\u3089<\/td>\n<\/tr>\n<tr>\n<td>\u6c34\u5e73\u9762\uff08\u7247\u65b9\u306e\u7aef\u3067\u5f15\u3044\u305f1\u679a\u306e\u5e73\u9762\uff09<\/td>\n<td>\u51fa\u767a\u70b9\u306e\u6c34\u5e73\u9762\u3092\u305d\u306e\u307e\u307e\u5ef6\u9577\u3057\u305f\u5e73\u9762<\/td>\n<td>29km\u5148\u3067\u5730\u8868\u304c<strong>\u7d0466m\u4e0b<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u7403\u3067\u8fd1\u4f3c\u3059\u308b\u3068\uff08\u5730\u7403\u534a\u5f84 R = 6371km\uff09\u3001<\/p>\n<ul>\n<li>\u51fa\u767a\u70b9\u306e\u6c34\u5e73\u9762\u304b\u3089\u306e\u843d\u3061\u8fbc\u307f \u2252 d\u00b2 \/ (2R) \u2192 29km\u3067 <strong>66.0m<\/strong><\/li>\n<li>\u5f26\u306e\u4e2d\u592e\u306e\u3075\u304f\u3089\u307f \u2252 d\u00b2 \/ (8R) \u2192 29km\u3067 <strong>16.5m<\/strong><\/li>\n<\/ul>\n<p>66m\u306f\u3001\u5b9f\u6e2c\u3057\u305f\u6a19\u9ad8\u5dee4.7m\u306e14\u500d\u3067\u3059\u3002\u3064\u307e\u308a\u300c29km\u306e\u76f4\u7dda\u9053\u8def\u300d\u3067\u672c\u5f53\u306b\u4e00\u5b9a\u306a\u306e\u306f<strong>\u5e73\u9762\u3067\u306f\u306a\u304f\u6c34\u6e96\u9762\u304b\u3089\u306e\u9ad8\u3055<\/strong>\u3067\u3042\u3063\u3066\u3001\u5e73\u9762\u306e\u5074\u304c29km\u306766m\u96e2\u308c\u3066\u3044\u304d\u307e\u3059\u3002\u4e0b\u308a\u5742\u306b\u611f\u3058\u306a\u3044\u306e\u306f\u3001\u9053\u8def\u304c\u6c34\u5e73\u306b\u6cbf\u3063\u3066\u3044\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" style=\"width:80%;max-width:100%;height:auto;display:block;margin:0 auto;\" src=\"https:\/\/y42u.net\/tec001\/wp-content\/uploads\/2026\/09\/gde-fig-distance-three-ways.jpeg\" alt=\"\u540c\u30582\u70b9\u3067\u3082\u3001\u7403\u9762\u306b\u6cbf\u3046\u30fb\u5f26\u3067\u7d50\u3076\u30fb\u6a19\u9ad8\u5dee\u3092\u5165\u308c\u308b\u3067\u8ddd\u96e2\u304c\u5909\u308f\u308b\u3053\u3068\u3092\u793a\u3057\u305f\u56f3\"><\/p>\n<h2 id=\"_2\">\u6e2c\u91cf\u3067\u306f\u4f55\u30bb\u30f3\u30c1\u304b\u3089\u52b9\u304f\u304b<\/h2>\n<p>\u8996\u6e96\u7dda\uff08\u671b\u9060\u93e1\u3067\u898b\u901a\u3057\u305f\u7dda\uff09\u3067\u3082\u540c\u3058\u3053\u3068\u304c\u8d77\u304d\u307e\u3059\u3002\u5730\u7403\u306e\u4e38\u307f\u3067\u76ee\u6a19\u304c\u4e0b\u304c\u308b\u5206\u304c<strong>\u7403\u5dee<\/strong>\u3001\u5927\u6c17\u306e\u5c48\u6298\u3067\u8996\u7dda\u304c\u4e0b\u3078\u66f2\u304c\u308a\u76ee\u6a19\u304c\u6301\u3061\u4e0a\u304c\u3063\u3066\u898b\u3048\u308b\u5206\u304c<strong>\u6c17\u5dee<\/strong>\u3001\u5dee\u3057\u5f15\u304d\u306e\u6b8b\u308a\u304c<strong>\u4e21\u5dee<\/strong>\u3067\u3059\u3002\u5c48\u6298\u4fc2\u6570\u3092 k \u2252 0.14 \u3068\u3057\u3066\u8a08\u7b97\u3059\u308b\u3068\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u8996\u6e96\u8ddd\u96e2<\/th>\n<th>\u7403\u5dee d\u00b2\/(2R)<\/th>\n<th>\u6c17\u5dee k\u00b7d\u00b2\/(2R)<\/th>\n<th>\u4e21\u5dee (1\u2212k)\u00b7d\u00b2\/(2R)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>100 m<\/td>\n<td>0.8 mm<\/td>\n<td>0.1 mm<\/td>\n<td><strong>0.7 mm<\/strong><\/td>\n<\/tr>\n<tr>\n<td>500 m<\/td>\n<td>19.6 mm<\/td>\n<td>2.7 mm<\/td>\n<td><strong>16.9 mm<\/strong><\/td>\n<\/tr>\n<tr>\n<td>1,000 m<\/td>\n<td>78.5 mm<\/td>\n<td>11.0 mm<\/td>\n<td><strong>67.5 mm<\/strong><\/td>\n<\/tr>\n<tr>\n<td>2,000 m<\/td>\n<td>313.9 mm<\/td>\n<td>43.9 mm<\/td>\n<td><strong>270.0 mm<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li><strong>100m\u306a\u30890.7mm<\/strong>\u3002\u3075\u3064\u3046\u306e\u6e2c\u70b9\u9593\u9694\u3067\u306f\u7121\u8996\u3067\u304d\u308b\u5927\u304d\u3055\u3067\u3059<\/li>\n<li><strong>1km\u3067\u7d046.8cm<\/strong>\u3002\u5bfe\u5cb8\u30921km\u5148\u307e\u3067\u8996\u6e96\u3057\u3066\u9ad8\u4f4e\u5dee\u3092\u51fa\u3059\u306a\u3089\u3001\u88dc\u6b63\u3057\u306a\u3044\u30686cm\u7d1a\u306e\u8aa4\u5dee\u304c\u305d\u306e\u307e\u307e\u6b8b\u308a\u307e\u3059<\/li>\n<li>\u6c34\u6e96\u6e2c\u91cf\u3067<strong>\u524d\u8996\u3068\u5f8c\u8996\u306e\u8ddd\u96e2\u3092\u305d\u308d\u3048\u308b<\/strong>\u306e\u306f\u3001\u4e21\u5dee\u3092\u5de6\u53f3\u3067\u540c\u91cf\u306b\u3057\u3066\u5dee\u3057\u5f15\u304d\u3067\u6d88\u3059\u305f\u3081\u3067\u3059\u3002\u8ddd\u96e2\u3092\u305d\u308d\u3048\u3066\u304a\u3051\u3070\u3001\u4fc2\u6570k\u306e\u5f53\u3066\u305a\u3063\u307d\u3046\u306b\u983c\u3089\u305a\u306b\u6e08\u307f\u307e\u3059<\/li>\n<\/ul>\n<p>k \u2252 0.14 \u306f\u6a19\u6e96\u7684\u306a\u5024\u3067\u3001\u6c17\u6e29\u30fb\u6c17\u5727\u30fb\u5730\u9762\u304b\u3089\u306e\u9ad8\u3055\u3067\u5909\u308f\u308a\u307e\u3059\u3002\u65e5\u4e2d\u306e\u5730\u8868\u4ed8\u8fd1\u3067\u306f\u5927\u304d\u304f\u632f\u308c\u308b\u306e\u3067\u3001\u9577\u3044\u8996\u6e96\u7dda\u306e\u9ad8\u4f4e\u5dee\u3092\u7247\u65b9\u54111\u56de\u306e\u89b3\u6e2c\u3060\u3051\u3067\u6c7a\u3081\u306a\u3044\u306e\u304c\u5b89\u5168\u3067\u3059\u3002<\/p>\n<h2 id=\"gnss\">GNSS\u306e\u9ad8\u3055\u306f\u3001\u3053\u306e\u8a71\u306e\u3069\u3053\u306b\u5165\u308b\u304b<\/h2>\n<p>RTK-GNSS\u304c\u51fa\u3059\u9ad8\u3055\u306f<strong>\u6955\u5186\u4f53\u9ad8<\/strong>\u2014\u2014\u5e73\u9762\u3067\u3082\u6c34\u6e96\u9762\u3067\u3082\u306a\u304f\u3001\u6955\u5186\u4f53\u304b\u3089\u306e\u9ad8\u3055\u3067\u3059\u3002\u5730\u7403\u306e\u4e38\u307f\u306f\u6700\u521d\u304b\u3089\u5165\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u7403\u5dee\u30fb\u6c17\u5dee\u3092\u8db3\u3059\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305d\u306e\u4ee3\u308f\u308a\u306b\u53d6\u308a\u9055\u3048\u3084\u3059\u3044\u306e\u306f\u6b21\u306e2\u3064\u3067\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u53d6\u308a\u9055\u3048<\/th>\n<th>\u65e5\u672c\u4ed8\u8fd1\u3067\u306e\u5927\u304d\u3055<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u6955\u5186\u4f53\u9ad8\u3068\u6a19\u9ad8\uff08\u30b8\u30aa\u30a4\u30c9\u9ad8\u3092\u5f15\u304d\u5fd8\u308c\u308b\uff09<\/td>\n<td>30\u301c50m\u7d1a<\/td>\n<\/tr>\n<tr>\n<td>\u659c\u8ddd\u96e2\u30fb\u6c34\u5e73\u8ddd\u96e2\u30fb\u6295\u5f71\u9762\u8ddd\u96e2\u306e\u6df7\u7528\uff08\u5e73\u9762\u76f4\u89d2\u5ea7\u6a19\u7cfb\u306e\u8ddd\u96e2\u306b\u306f\u7e2e\u5c3a\u4fc2\u6570\u304c\u304b\u304b\u308b\uff09<\/td>\n<td>\u8ddd\u96e2\u306e\u6570\u5343\u5206\u306e1\u301c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u9577\u3044\u76f4\u7dda\u533a\u9593\u3092\u901a\u3059\u5de5\u4e8b\u3067\u306f\u3001\u6210\u679c\u306b\u300c\u3069\u306e\u9762\u306e\u8ddd\u96e2\u304b\u300d\u300c\u3069\u306e\u57fa\u6e96\u306e\u9ad8\u3055\u304b\u300d\u30921\u884c\u66f8\u3044\u3066\u304a\u304f\u3060\u3051\u3067\u3001\u3042\u3068\u304b\u3089\u691c\u7b97\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2 id=\"_3\">\u307e\u3068\u3081<\/h2>\n<ul>\n<li>\u56fd\u905312\u53f7\u306e\u76f4\u7dda\u533a\u9593\u306f<strong>\u7d0429km<\/strong>\uff08\u56fd\u571f\u4ea4\u901a\u7701\uff09\u3002\u4e21\u7aef\u8fd1\u304f\u306e\u4ee3\u8868\u70b9\u306e\u6a19\u9ad8\u5dee\u306f<strong>4.7m<\/strong>\uff08\u6a19\u9ad8API\u30fb2026\u5e749\u6708\u6642\u70b9\uff09<\/li>\n<li>\u51fa\u767a\u70b9\u306e\u6c34\u5e73\u9762\u309229km\u5ef6\u3070\u3059\u3068\u3001\u5730\u8868\u306f\u305d\u306e\u9762\u304b\u3089<strong>\u7d0466m\u4e0b<\/strong>\u3078\u96e2\u308c\u308b\u3002\u5f26\u3067\u7d50\u3076\u3068\u4e2d\u592e\u304c<strong>\u7d0416.5m<\/strong>\u5730\u4e2d\u3092\u901a\u308b<\/li>\n<li>\u9053\u8def\u304c\u300c\u307e\u3063\u3059\u3050\u30fb\u6c34\u5e73\u300d\u306b\u898b\u3048\u308b\u306e\u306f\u3001\u6c34\u5e73\u9762\u304c\u5730\u7403\u306b\u6cbf\u3063\u3066\u66f2\u304c\u3063\u3066\u3044\u308b\u304b\u3089<\/li>\n<li>\u8996\u6e96\u7dda\u3067\u306f\u7403\u5dee\uff0b\u6c17\u5dee\uff1d<strong>\u4e21\u5dee<\/strong>\u3002100m\u30670.7mm\u3001<strong>1km\u3067\u7d046.8cm<\/strong><\/li>\n<li>\u6c34\u6e96\u6e2c\u91cf\u3067\u524d\u5f8c\u8996\u306e\u8ddd\u96e2\u3092\u305d\u308d\u3048\u308b\u306e\u306f\u3001\u4e21\u5dee\u3092\u6253\u3061\u6d88\u3059\u305f\u3081<\/li>\n<li>GNSS\u306e\u9ad8\u3055\u306f\u6955\u5186\u4f53\u57fa\u6e96\u306a\u306e\u3067\u4e38\u307f\u306f\u5165\u3063\u3066\u3044\u308b\u3002\u4ee3\u308f\u308a\u306b\u6955\u5186\u4f53\u9ad8\u3068\u6a19\u9ad8\u3001\u8ddd\u96e2\u306e\u9762\u306e\u53d6\u308a\u9055\u3048\u306b\u6ce8\u610f\u3059\u308b<\/li>\n<\/ul>\n<blockquote><p>\n66m\u30fb16.5m\u30fb\u4e21\u5dee\u306e\u5404\u5024\u306f R = 6371km \u306e\u7403\u8fd1\u4f3c\u306b\u3088\u308b\u8a08\u7b97\u5024\u3067\u3059\u3002\u6a19\u9ad8\u3068\u8ddd\u96e2\u306f\u516c\u958b\u30c7\u30fc\u30bf\u3078\u306e\u7167\u4f1a\u5024\u30fb\u8a08\u7b97\u5024\u3067\u3042\u308a\u3001\u9053\u8def\u4e2d\u5fc3\u7dda\u306e\u5b9f\u969b\u306e\u7e26\u65ad\u52fe\u914d\u3092\u793a\u3059\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\n<\/p><\/blockquote>\n<h3 id=\"_4\">\u51fa\u5178<\/h3>\n<ul>\n<li>\u56fd\u571f\u4ea4\u901a\u7701\u300c\u9053\u8def\uff1a\u9053\u306e\u76f8\u8ac7\u5ba4\uff1a\u9053\u306b\u95a2\u3059\u308b\u5404\u7a2e\u30c7\u30fc\u30bf\u96c6\u300d\uff08\u56fd\u9053\u3067\u4e00\u756a\u9577\u3044\u76f4\u7dda\u9053\u8def\uff09 https:\/\/www.mlit.go.jp\/road\/soudan\/soudan_10b_03.html<\/li>\n<li>\u56fd\u571f\u5730\u7406\u9662\u300c\u6a19\u9ad8API\u300d https:\/\/maps.gsi.go.jp\/development\/elevation_s.html<\/li>\n<li>\u56fd\u571f\u5730\u7406\u9662\u300c\u57fa\u76e4\u5730\u56f3\u60c5\u5831\u3000\u6570\u5024\u6a19\u9ad8\u30e2\u30c7\u30eb\u300d https:\/\/www.gsi.go.jp\/kiban\/<\/li>\n<li>\u56fd\u571f\u5730\u7406\u9662\u300c\u5730\u7406\u9662\u5730\u56f3\u300d\uff08\u5730\u540d\u30fb\u4f4f\u6240\u306e\u4f4d\u7f6e\u691c\u7d22\uff09 https:\/\/maps.gsi.go.jp\/<\/li>\n<li>\u56fd\u571f\u5730\u7406\u9662\u300c\u4f5c\u696d\u898f\u7a0b\u306e\u6e96\u5247\u306b\u3064\u3044\u3066\u300d https:\/\/www.gsi.go.jp\/gijyutukanri\/gijyutukanri41018.html<\/li>\n<\/ul>\n<hr \/>\n<h2 id=\"_5\">\u6b21\u306b\u78ba\u8a8d\u3059\u308b<\/h2>\n<ul>\n<li><a href=\"https:\/\/y42u.net\/tec001\/2026\/09\/27\/deepest-lake-bottom-below-sea-level-field\/\">\u65e5\u672c\u4e00\u6df1\u3044\u6e56\u306e\u5e95\u306f\u3001\u6d77\u9762\u3088\u308a\u4f55\u30e1\u30fc\u30c8\u30eb\u4e0b\uff1f<\/a> \u2014 \u9ad8\u3055\u3092\u6570\u3048\u59cb\u3081\u308b\u9762\u3092\u53d6\u308a\u9055\u3048\u308b\u3068\u3001\u540c\u3058\u5834\u6240\u306e\u6570\u5b57\u304c\u6570\u767em\u5909\u308f\u308b\u4f8b\u3067\u3059<\/li>\n<li><a href=\"https:\/\/y42u.net\/tec001\/2026\/09\/15\/farthest-point-from-sea-japan-saku-field\/\">\u65e5\u672c\u3067\u3044\u3061\u3070\u3093\u6d77\u304b\u3089\u9060\u3044\u5834\u6240\u306f\u3069\u3053\uff1f<\/a> \u2014 \u300c\u65e5\u672c\u4e00\u300d\u3092\u8ddd\u96e2\u3067\u6c7a\u3081\u308b\u3068\u304d\u3001\u3069\u306e\u9762\u306e\u8ddd\u96e2\u3067\u6e2c\u308b\u304b\u3067\u9806\u4f4d\u304c\u52d5\u304f\u8a71\u3067\u3059<\/li>\n<li><a href=\"https:\/\/y42u.net\/tec001\/2026\/07\/07\/gnss-leveling-survey-standard-field\/\">\u300cGNSS\u6c34\u6e96\u6e2c\u91cf\u300d\u304c\u516c\u5171\u6e2c\u91cf\u306b\u6b63\u5f0f\u5c0e\u5165<\/a> \u2014 \u9ad8\u4f4e\u5dee\u3092\u51fa\u3059\u624b\u6bb5\u3068\u3057\u3066\u3001\u6c34\u6e96\u6e2c\u91cf\u3068GNSS\u3092\u3069\u3046\u4f7f\u3044\u5206\u3051\u308b\u304b\u304c\u5206\u304b\u308a\u307e\u3059<\/li>\n<li><a href=\"https:\/\/gmp.y42u.net\/2026\/08\/29\/horizon-distance-earth-curvature-learning\/\">\u6c34\u5e73\u7dda\u307e\u3067\u306e\u8ddd\u96e2\u306f\u4f55\u30ad\u30ed\uff1f\uff08GeoPrism JP\uff09<\/a> \u2014 \u672c\u8a18\u4e8b\u3068\u540c\u3058 d\u00b2\/2R \u3092\u3001\u898b\u901a\u3057\u8ddd\u96e2\u306e\u5074\u304b\u3089\u56f3\u3067\u78ba\u304b\u3081\u3089\u308c\u307e\u3059<\/li>\n<li>\u66f8\u7c4d\u3067\u307e\u3068\u3081\u3066\u5b66\u3076: <a href=\"https:\/\/www.amazon.co.jp\/dp\/B0HF4SJC1L\">\u300e\u65e5\u672c\u306e\u6e2c\u5730\u7cfbQ&amp;A\u300f\u7b2c2\u7ae0\u300c\u5730\u7403\u306e\u304b\u305f\u3061\u3068\u300c\u30e1\u30fc\u30c8\u30eb\u300d\u300d<\/a>\uff08Kindle Unlimited\u5bfe\u5fdc\uff09<\/li>\n<\/ul>\n<hr \/>\n<blockquote><p>\n<strong>\u958b\u767a\u8005\u3088\u308a<\/strong>: \u30a2\u30d7\u30ea\u30fbKindle\u672c\u30fb\u516c\u958b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4e00\u89a7\u306f <a href=\"https:\/\/github.com\/amru195704\">GitHub: amru195704<\/a> \u306b\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002\n<\/p><\/blockquote>\n<hr \/>\n<blockquote><p>\n<strong>\u304a\u9858\u3044<\/strong><br \/>\n\u672c\u8a18\u4e8b\u306e\u60c5\u5831\u306f\u53c2\u8003\u76ee\u7684\u3067\u63b2\u8f09\u3057\u3066\u304a\u308a\u3001\u6b63\u78ba\u6027\u30fb\u5b8c\u5168\u6027\u3092\u4fdd\u8a3c\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u8aa4\u8a18\u30fb\u4e0d\u6b63\u78ba\u306a\u60c5\u5831\u304c\u3054\u3056\u3044\u307e\u3057\u305f\u3089\u3001\u30b3\u30e1\u30f3\u30c8\u6b04\u3088\u308a\u3054\u6307\u6458\u3044\u305f\u3060\u3051\u308c\u3070\u3001\u78ba\u8a8d\u306e\u3046\u3048\u4fee\u6b63\u3044\u305f\u3057\u307e\u3059\u3002\n<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>\u65e5\u672c\u4e00\u9577\u3044\u76f4\u7dda\u9053\u8def\u306f\u672c\u5f53\u306b\u307e\u3063\u3059\u3050\uff1f \u2014 29km\u3067\u5730\u7403\u306e\u4e38\u307f\u304c66m\u30011km\u5148\u306e\u9ad8\u3055\u304c7cm\u305a\u308c\u308b\u7406\u7531 \u307e\u3063\u3059\u3050\u306b\u898b\u3048\u308b\u9053\u8def\u306f\u3001\u5e7e\u4f55\u5b66\u7684\u306a\u76f4\u7dda\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5317\u6d77\u9053\u306e\u56fd\u905312\u53f7\u306e\u76f4\u7dda\u533a\u9593\uff08\u7d0429km\uff09\u30921\u679a\u306e\u5e73\u3089\u306a\u677f\u3067 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4172,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"sns_share_botton_hide":"","vkExUnit_sns_title":"","_vk_print_noindex":"","sitemap_hide":"","_veu_custom_css":"","veu_display_promotion_alert":"","vkexunit_cta_each_option":"","_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[17,614,33,609,611,607,613,411,612,610],"class_list":["post-4174","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-geodiveexa","tag-614","tag-33","tag-609","tag-611","tag-api","tag-613","tag-411","tag-612","tag-610"],"veu_head_title_object":{"title":"","add_site_title":""},"jetpack_publicize_connections":[],"jetpack-related-posts":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/y42u.net\/tec001\/wp-content\/uploads\/2026\/09\/gde-longest-straight-road-earth-curvature-field.jpeg","_links":{"self":[{"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/posts\/4174","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/comments?post=4174"}],"version-history":[{"count":0,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/posts\/4174\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/media\/4172"}],"wp:attachment":[{"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/media?parent=4174"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/categories?post=4174"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/y42u.net\/tec001\/wp-json\/wp\/v2\/tags?post=4174"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}