{"id":1061,"date":"2024-09-27T18:55:25","date_gmt":"2024-09-27T09:55:25","guid":{"rendered":"https:\/\/rakudaseitai.com\/?p=1061"},"modified":"2024-11-25T20:06:26","modified_gmt":"2024-11-25T11:06:26","slug":"dem_slope","status":"publish","type":"post","link":"https:\/\/rakudaseitai.com\/?p=1061","title":{"rendered":"DEM\u30c7\u30fc\u30bf\u304b\u3089\u8c37\u7b4b\u3092\u62bd\u51fa\u3057\u3001\u305d\u306e\u52fe\u914d\u3092\u6c42\u3081\u308b\u624b\u9806"},"content":{"rendered":"<p class=\"hh hh1\"><strong>\u30bd\u30d5\u30c8\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/strong><\/p>\n<p>QGIS\uff08\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u306f<a href=\"https:\/\/qgis.org\/\">\u3053\u3061\u3089<\/a>\uff08https:\/\/qgis.org\/\uff09\uff09\u3001SAGA GIS\uff08\u30c0\u30a6\u30a6\u30f3\u30ed\u30fc\u30c9\u306f<a href=\"https:\/\/sourceforge.net\/projects\/saga-gis\/files\/SAGA%20-%209\/\">\u3053\u3061\u3089<\/a>\uff08https:\/\/sourceforge.net\/projects\/saga-gis\/files\/SAGA%20-%209\/\uff09\uff09\u306e2\u3064\u306e\u30bd\u30d5\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p class=\"hh hh1\"><strong>\u30c7\u30fc\u30bf\u306e\u7528\u610f<\/strong><\/p>\n<p>\u57fa\u76e4\u5730\u56f3\u60c5\u5831\u306e<a href=\"https:\/\/fgd.gsi.go.jp\/download\/menu.php\">\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u30b5\u30a4\u30c8<\/a>\uff08https:\/\/fgd.gsi.go.jp\/download\/menu.php\uff09\u3088\u308a\u3001DEM\u30c7\u30fc\u30bf\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002<\/p>\n<p>DEM\u30c7\u30fc\u30bf\u306e\u5909\u63db\u306b\u3064\u3044\u3066\u306f\u3001<a href=\"https:\/\/rakudaseitai.com\/demtoraster\/\">\u3053\u3061\u3089\u306e\u8a18\u4e8b<\/a>\uff08https:\/\/rakudaseitai.com\/demtoraster\/\uff09\u3092\u53c2\u8003\u306b\u3001\u30e9\u30b9\u30bf\u307e\u3067\u5909\u63db\u3057\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p class=\"hh hh1\"><strong>SAGA GIS\u306b\u3088\u308b\u8c37\u7b4b\u306e\u62bd\u51fa<\/strong><\/p>\n<p>SAGA GIS\u3092\u4f7f\u7528\u3057\u3066\u3001\u8c37\u7b4b\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u306f\u3001dem\u30c7\u30fc\u30bf\u306etiff\u30d5\u30a1\u30a4\u30eb\u3092\u30c9\u30e9\u30c3\u30b0\u30a2\u30f3\u30c9\u30c9\u30ed\u30c3\u30d7\u3057\u3066\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1062\" src=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image002-3.png\" alt=\"\" width=\"708\" height=\"397\" srcset=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image002-3.png 708w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image002-3-300x168.png 300w\" sizes=\"auto, (max-width: 708px) 100vw, 708px\"><\/p>\n<p>&nbsp;<\/p>\n<p>Geoprocessing\u2192Terrain Analysis\u2192Channels\u2192Channel Network and Drainage Basins\u3000\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1063\" src=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image003-3.png\" alt=\"\" width=\"805\" height=\"604\" srcset=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image003-3.png 805w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image003-3-300x225.png 300w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image003-3-768x576.png 768w\" sizes=\"auto, (max-width: 805px) 100vw, 805px\"><\/p>\n<p>&nbsp;<\/p>\n<p>Grid System\u3068Elevation\u306bdem\u3092\u9078\u629e\u3057\u3066\u3001Okay\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n<p>Threshold\u306f\u3001\u5c0f\u3055\u3044\u6570\u5024\u3067\u3042\u308c\u3070\u3042\u308b\u307b\u3069\u3001\u7d30\u304b\u3044\u8c37\u7b4b\u3092\u62fe\u3046\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u4eca\u56de\u306f5\u3068\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1064\" src=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image005-4.png\" alt=\"\" width=\"1331\" height=\"713\" srcset=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image005-4.png 1331w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image005-4-300x161.png 300w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image005-4-1024x549.png 1024w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image005-4-768x411.png 768w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image005-4-940x504.png 940w\" sizes=\"auto, (max-width: 1331px) 100vw, 1331px\"><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>OK\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068Line\uff08Channels\uff09\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1065\" src=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image007-2.png\" alt=\"\" width=\"1519\" height=\"791\" srcset=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image007-2.png 1519w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image007-2-300x156.png 300w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image007-2-1024x533.png 1024w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image007-2-768x400.png 768w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image007-2-940x489.png 940w\" sizes=\"auto, (max-width: 1519px) 100vw, 1519px\"><\/p>\n<p>&nbsp;<\/p>\n<p>Channels\u306e\u4e0a\u3067\u53f3\u30af\u30ea\u30c3\u30af\u2192Save as\u3092\u9078\u629e\u3057\u3066\u3001shp\u30d5\u30a1\u30a4\u30eb\u3067\u4fdd\u5b58\u3057\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p class=\"hh hh1\"><strong>QGIS\u306b\u3088\u308b\u8c37\u7b4b\u306e\u52fe\u914d\u7b97\u51fa<\/strong><\/p>\n<p>QGIS\u306bdem\u30c7\u30fc\u30bf\u3068\u30e9\u30a4\u30f3\u306e\u30c7\u30fc\u30bf\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1066\" src=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image010-1.png\" alt=\"\" width=\"709\" height=\"466\" srcset=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image010-1.png 709w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image010-1-300x197.png 300w\" sizes=\"auto, (max-width: 709px) 100vw, 709px\"><\/p>\n<p>&nbsp;<\/p>\n<p>\u52fe\u914d\u3092\u51fa\u3057\u305f\u3044\u30e9\u30a4\u30f3\u3092\u9078\u629e\u3057\u3066\u3001shp\u30d5\u30a1\u30a4\u30eb\u3067\u62bd\u51fa\u3057\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1067\" src=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image011-4.png\" alt=\"\" width=\"1089\" height=\"330\" srcset=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image011-4.png 1089w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image011-4-300x91.png 300w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image011-4-1024x310.png 1024w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image011-4-768x233.png 768w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image011-4-940x285.png 940w\" sizes=\"auto, (max-width: 1089px) 100vw, 1089px\"><\/p>\n<p>&nbsp;<\/p>\n<p>Line\u30921m\u3054\u3068\u3067\u5206\u5272\u3057\u3066\u3001\u30dd\u30a4\u30f3\u30c8\u30c7\u30fc\u30bf\u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/p>\n<p>\u30d7\u30e9\u30b0\u30a4\u30f3\u3067\u3001QChainage\u3092\u65b0\u305f\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002<\/p>\n<p>\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u5f8c\u306f\u4e0a\u306e\u30d9\u30af\u30bf\u30bf\u30d6\u3088\u308a\u9078\u3079\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>QChainage\u3092\u30af\u30ea\u30c3\u30af\u3057\u3001\u5206\u5272\u3057\u305f\u3044\u9577\u3055\u3092\u9078\u629e\u3057\u3001OK\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1068\" src=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image013-1.png\" alt=\"\" width=\"363\" height=\"294\" srcset=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image013-1.png 363w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image013-1-300x243.png 300w\" sizes=\"auto, (max-width: 363px) 100vw, 363px\"><\/p>\n<p>&nbsp;<\/p>\n<p>1m\u3054\u3068\u306b\u30dd\u30a4\u30f3\u30c8\u30c7\u30fc\u30bf\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1069\" src=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image014-5.png\" alt=\"\" width=\"1084\" height=\"391\" srcset=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image014-5.png 1084w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image014-5-300x108.png 300w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image014-5-1024x369.png 1024w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image014-5-768x277.png 768w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image014-5-940x339.png 940w\" sizes=\"auto, (max-width: 1084px) 100vw, 1084px\"><\/p>\n<p>&nbsp;<\/p>\n<p>X\u3001Y\u3001Z\u5ea7\u6a19\u3092\u30dd\u30a4\u30f3\u30c8\u30c7\u30fc\u30bf\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u3001X\u3001Y\u3092\u8ffd\u52a0\u3059\u308b\u305f\u3081\u306b\u3001\u30d7\u30ed\u30bb\u30b7\u30f3\u30b0\u30c4\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u2192\u30d9\u30af\u30bf\u30b8\u30aa\u30e1\u30c8\u30ea\u2192\u30b8\u30aa\u30e1\u30c8\u30ea\u5c5e\u6027\u3092\u8ffd\u52a0\u3000\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/p>\n<p>\u9078\u629e\u5f8c\u3001\u5fc5\u8981\u9805\u76ee\u3092\u5165\u529b\u3057\u3066\u5b9f\u884c\u3059\u308b\u3068\u3001\u5c5e\u6027\u30c6\u30fc\u30d6\u30eb\u306bX\u3001Y\u5ea7\u6a19\u304c\u8ffd\u52a0\u3055\u308c\u305f\u30dd\u30a4\u30f3\u30c8\u30c7\u30fc\u30bf\u306e\u30ec\u30a4\u30e4\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1070\" src=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image016-5.png\" alt=\"\" width=\"436\" height=\"231\" srcset=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image016-5.png 436w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image016-5-300x159.png 300w\" sizes=\"auto, (max-width: 436px) 100vw, 436px\"><\/p>\n<p>&nbsp;<\/p>\n<p>\u30dd\u30a4\u30f3\u30c8\u30c7\u30fc\u30bf\u306eZ\u306e\u5024\u306b\u52fe\u914d\u3092\u5165\u308c\u308b\u305f\u3081\u306b\u3001dem\u30c7\u30fc\u30bf\u304b\u3089\u52fe\u914d\u3092\u7b97\u51fa\u3057\u307e\u3059\u3002<\/p>\n<p>\u30d7\u30ed\u30bb\u30b7\u30f3\u30b0\u30c4\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u2192\u30e9\u30b9\u30bf\u5730\u5f62\u89e3\u6790\u2192\u50be\u659c\uff08slope\uff09\u3092\u9078\u629e\u3057\u307e\u3059<\/p>\n<p>DEM\u30ec\u30a4\u30e4\u306b\u8ffd\u52a0\u3057\u305fdem\u30c7\u30fc\u30bf\u3092\u9078\u629e\u3057\u3001\u5b9f\u884c\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1071\" src=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image017-3.png\" alt=\"\" width=\"669\" height=\"537\" srcset=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image017-3.png 669w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image017-3-300x241.png 300w\" sizes=\"auto, (max-width: 669px) 100vw, 669px\"><\/p>\n<p>&nbsp;<\/p>\n<p>\u50be\u659c\u306e\u30e9\u30b9\u30bf\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1072\" src=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image020-4.png\" alt=\"\" width=\"709\" height=\"384\" srcset=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image020-4.png 709w, https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image020-4-300x162.png 300w\" sizes=\"auto, (max-width: 709px) 100vw, 709px\"><\/p>\n<p>&nbsp;<\/p>\n<p>\u30dd\u30a4\u30f3\u30c8\u30c7\u30fc\u30bf\u306bZ\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002\u30d7\u30ed\u30bb\u30b7\u30f3\u30b0\u30c4\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u2192\u30e9\u30b9\u30bf\u89e3\u6790\u2192\u30d9\u30af\u30bf\u30ec\u30a4\u30e4\u306b\u30e9\u30b9\u30bf\u5024\u3092\u4ed8\u52a0\u3000\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/p>\n<p>\u5165\u529b\u30ec\u30a4\u30e4\u306bX\u3001Y\u3092\u8ffd\u52a0\u3057\u305f\u30dd\u30a4\u30f3\u30c8\u30c7\u30fc\u30bf\u3092\u3001\u30e9\u30b9\u30bf\u30c7\u30fc\u30bf\u306bslope\u306e\u30c7\u30fc\u30bf\u3092\u9078\u629e\u3057\u3066\u3001\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1073\" src=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image022-2.png\" alt=\"\" width=\"709\" height=\"569\" srcset=\"https:\/\/rakudaseitai.com\/wp-content\/uploads\/2024\/09\/image022-2.png 709w, 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