{"id":13153,"date":"2022-11-29T17:39:25","date_gmt":"2022-11-29T08:39:25","guid":{"rendered":"http:\/\/www.gisdeveloper.co.kr\/?p=13153"},"modified":"2022-11-30T12:16:48","modified_gmt":"2022-11-30T03:16:48","slug":"pyqgis%eb%a5%bc-%ec%9d%b4%ec%9a%a9%ed%95%9c-%eb%b2%a1%ed%84%b0-%eb%8d%b0%ec%9d%b4%ed%84%b0-%ec%b2%98%eb%a6%ac-9-%ea%b3%84%ec%82%b0-%ed%95%84%eb%93%9c-%ec%b6%94%ea%b0%80%ed%95%98%ea%b8%b0","status":"publish","type":"post","link":"http:\/\/www.gisdeveloper.co.kr\/?p=13153","title":{"rendered":"pyQGIS\ub97c \uc774\uc6a9\ud55c \ubca1\ud130 \ub370\uc774\ud130 \ucc98\ub9ac 9 : \uacc4\uc0b0 \ud544\ub4dc \ucd94\uac00\ud558\uae30"},"content":{"rendered":"<p><iframe loading=\"lazy\" width=\"745\" height=\"419\" src=\"https:\/\/www.youtube.com\/embed\/RHPhKes8ujk\" title=\"pyQGIS\ub97c \uc774\uc6a9\ud55c \ubca1\ud130 \ub370\uc774\ud130 \ucc98\ub9ac: 9) \uacc4\uc0b0\ud544\ub4dc\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<p>\uacc4\uc0b0 \ud544\ub4dc\ub294 \uc5b4\ub5a4 \uac12 \ub4f1\uc744 \uc774\uc6a9\ud574 \uacc4\uc0b0\ub41c \uacb0\uacfc\uac12\uc744 \uc800\uc7a5\ud558\ub294 \ud544\ub4dc\uc778\ub370, \ud2b9\ud788 \uae30\uc874\uc758 \ub2e4\ub978 \ud544\ub4dc\uac12\ub4e4\uc744 \uc774\uc6a9\ud558\uc5ec \uc0c8\ub85c\uc6b4 \uac12\uc744 \ub9cc\ub4e4\uc5b4 \uc0c8\ub85c\uc6b4 \ud544\ub4dc\uc5d0 \uc800\uc7a5\ud574 \ub458 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uc608\uc81c\uc5d0\uc11c\ub294 2\uac1c\uc758 \uacc4\uc0b0 \ud544\ub4dc\ub97c \uc0c8\ub86d\uac8c \ucd94\uac00\ud560 \uac83\uc774\uba70 \uccab\ubc88\uc9f8\ub294 \uc9c0\uc624\uba54\ud2b8\ub9ac\uc758 \uae38\uc774\uac12, \ub450\ubc88\uc9f8\ub294 \uae30\uc874\uc758 \uc5b4\ub5a4 \ud544\ub4dc\uac12\uc744 \uccab\ubc88\uc9f8 \uacc4\uc0b0\ud544\ub4dc\ub85c \ub098\ub208 \ud544\ub4dc\uc785\ub2c8\ub2e4. \uc774 2\uac1c\uc758 \uacc4\uc0b0\ud544\ub4dc\ub97c \uc815\uc758\ud558\ub294 \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">\r\nQgsProject.instance().removeAllMapLayers()\r\nlayer = QgsVectorLayer(\"D:\/__Data__\/\uc138\uc885\ud2b9\ubcc4\uc790\uce58\uc2dc_36000\/TL_SPRD_MANAGE.shp\", \"TL_SPRD_MANAGE\")\r\nQgsProject.instance().addMapLayers([layer])\r\n\r\npv = layer.dataProvider()\r\npv.addAttributes(\r\n    [\r\n        QgsField(\"len\", QVariant.Double),\r\n        QgsField(\"calc\", QVariant.Double)\r\n    ]\r\n)\r\n\r\nlayer.updateFields()\r\n<\/pre>\n<p>\uc704\uc758 \ucf54\ub4dc\uc5d0\uc11c len \ud544\ub4dc\uac00 \uc9c0\uc624\uba54\ud2b8\ub9ac\uc758 \uae38\uc774 \uac12\uc744 \uc800\uc7a5\ud574 \ub458 \ud544\ub4dc\uc774\uace0 calc\ub294 ROAD_LT\ub77c\ub294 \ud544\ub4dc\uac12\uc5d0 len \ud544\ub4dc\uac12\uc744 \ub098\ub208 \uacb0\uacfc\ub97c \uc800\uc7a5\ud560 \ud544\ub4dc\uc785\ub2c8\ub2e4. \uc774\ucc98\ub7fc \uacc4\uc0b0\uc5d0 \ub300\ud55c \ud45c\ud604\uc2dd\uc744 \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">\r\nexpression1 = QgsExpression(\"$length\")\r\nexpression2 = QgsExpression('\"ROAD_LT\"\/\"len\"')\r\n<\/pre>\n<p>\uadf8\ub9ac\uace0 \uacc4\uc0b0 \ud544\ub4dc\uc5d0 \ud45c\ud604\uc2dd \uc801\uc6a9\uc744 \uc704\ud55c \ubb38\ub9e5\uc744 \uc815\uc758\ud558\ub294 \uac1d\uccb4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">\r\ncontext = QgsExpressionContext()\r\ncontext.appendScopes(QgsExpressionContextUtils.globalProjectLayerScopes(layer))\r\n<\/pre>\n<p>\uc774\uc81c \ub808\uc774\uc5b4\ub97c \uad6c\uc131\ud558\ub294 \ubaa8\ub4e0 \ud53c\uccd0\uc5d0 \ub300\ud574 \uc21c\ucc28\uc801\uc73c\ub85c \uacc4\uc0b0 \ud544\ub4dc\uc758 \uac12\uc744 \uc800\uc7a5\ud558\ub294 \ucf54\ub4dc\ub97c \uc791\uc131\ud569\ub2c8\ub2e4. \uba3c\uc800 len \ud544\ub4dc\uc5d0 \ub300\ud55c \ucc98\ub9ac\uc785\ub2c8\ub2e4.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">\r\nwith edit(layer):\r\n    for f in layer.getFeatures():\r\n        context.setFeature(f)\r\n        f[\"len\"] = expression1.evaluate(context)\r\n        layer.updateFeature(f)\r\n<\/pre>\n<p>\ub2e4\uc74c\uc740 calc \ud544\ub4dc\uc5d0 \ub300\ud55c \ucc98\ub9ac\uc785\ub2c8\ub2e4.<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">\r\nwith edit(layer):\r\n    for f in layer.getFeatures():\r\n        context.setFeature(f)\r\n        f[\"calc\"] = expression2.evaluate(context)\r\n        layer.updateFeature(f)       \r\n<\/pre>\n<p>\uc2e4\ud589\ud558\uace0 \ub808\uc774\uc5b4\uc758 \uc18d\uc131 \uc815\ubcf4\ub97c \ud655\uc778\ud574 \ubcf4\uba74 \ub2e4\uc74c\ucc98\ub7fc 2\uac1c\uc758 \uacc4\uc0b0 \ud544\ub4dc\uac00 \uc800\uc7a5\ub418\uc5b4 \uc788\ub294 \uac83\uc744 \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. (\ud53c\uccd0 \uac1c\uc218\uc5d0 \ub530\ub77c \uc2e4\ud589 \uc2dc\uac04\uc774 \uc81c\ubc95 \uac78\ub9bd\ub2c8\ub2e4)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.gisdeveloper.co.kr\/wp-content\/uploads\/2022\/11\/pgQGIS_calc.jpg\" alt=\"\" width=\"463\" height=\"602\" class=\"alignnone size-full wp-image-13156\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uacc4\uc0b0 \ud544\ub4dc\ub294 \uc5b4\ub5a4 \uac12 \ub4f1\uc744 \uc774\uc6a9\ud574 \uacc4\uc0b0\ub41c \uacb0\uacfc\uac12\uc744 \uc800\uc7a5\ud558\ub294 \ud544\ub4dc\uc778\ub370, \ud2b9\ud788 \uae30\uc874\uc758 \ub2e4\ub978 \ud544\ub4dc\uac12\ub4e4\uc744 \uc774\uc6a9\ud558\uc5ec \uc0c8\ub85c\uc6b4 \uac12\uc744 \ub9cc\ub4e4\uc5b4 \uc0c8\ub85c\uc6b4 \ud544\ub4dc\uc5d0 \uc800\uc7a5\ud574 \ub458 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uc608\uc81c\uc5d0\uc11c\ub294 2\uac1c\uc758 \uacc4\uc0b0 \ud544\ub4dc\ub97c \uc0c8\ub86d\uac8c \ucd94\uac00\ud560 \uac83\uc774\uba70 \uccab\ubc88\uc9f8\ub294 \uc9c0\uc624\uba54\ud2b8\ub9ac\uc758 \uae38\uc774\uac12, \ub450\ubc88\uc9f8\ub294 \uae30\uc874\uc758 \uc5b4\ub5a4 \ud544\ub4dc\uac12\uc744 \uccab\ubc88\uc9f8 \uacc4\uc0b0\ud544\ub4dc\ub85c \ub098\ub208 \ud544\ub4dc\uc785\ub2c8\ub2e4. \uc774 2\uac1c\uc758 \uacc4\uc0b0\ud544\ub4dc\ub97c \uc815\uc758\ud558\ub294 \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4. QgsProject.instance().removeAllMapLayers() layer = QgsVectorLayer(&#8220;D:\/__Data__\/\uc138\uc885\ud2b9\ubcc4\uc790\uce58\uc2dc_36000\/TL_SPRD_MANAGE.shp&#8221;, &#8220;TL_SPRD_MANAGE&#8221;) &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/www.gisdeveloper.co.kr\/?p=13153\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;pyQGIS\ub97c \uc774\uc6a9\ud55c \ubca1\ud130 \ub370\uc774\ud130 \ucc98\ub9ac 9 : \uacc4\uc0b0 \ud544\ub4dc \ucd94\uac00\ud558\uae30&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[146],"tags":[],"class_list":["post-13153","post","type-post","status-publish","format-standard","hentry","category-pyqgis"],"_links":{"self":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/13153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13153"}],"version-history":[{"count":4,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/13153\/revisions"}],"predecessor-version":[{"id":13204,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/13153\/revisions\/13204"}],"wp:attachment":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13153"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}