Chapter<\/strong>\u00a01:<\/strong>\u00a0An<\/strong>\u00a0introduction to the<\/strong>\u00a0\u00a0graphic modeller<\/strong><\/p>\r\n\r\n\r\n\r\n When\u00a0you\u00a0perform\u00a0a\u00a0spatial\u00a0analysis,\u00a0usually\u00a0a\u00a0series\u00a0of operations\u00a0are included.\u00a0The\u00a0result\u00a0of one operation is used\u00a0as an\u00a0entry for the following operation.\u00a0The\u00a0final\u00a0result\u00a0concludes\u00a0all\u00a0this\u00a0series\u00a0of operations.\u00a0In\u00a0using\u00a0the\u00a0graphic modeller,\u00a0you\u00a0can\u00a0combine\u00a0these\u00a0different\u00a0steps\u00a0in\u00a0a\u00a0single\u00a0process.\u00a0The interface\u00a0of the\u00a0graphic modeller\u00a0allows\u00a0you to visually\u00a0define\u00a0the\u00a0data\u00a0as\u00a0input, the output\u00a0data and the\u00a0processing\u00a0algorithms.\u00a0 The personalized tool\u00a0looks\u00a0like\u00a0other\u00a0tools\u00a0in\u00a0the\u00a0processing toolbox.\u00a0You\u00a0run\u00a0it\u00a0by\u00a0double-clicking,\u00a0a\u00a0setting\u00a0window\u00a0opens\u00a0, and after\u00a0the identification\u00a0of the\u00a0input data\u00a0layers and\u00a0the wished names\u00a0\u00a0for the results,\u00a0\u00a0the entire analysis\u00a0will\u00a0take place\u00a0in\u00a0one\u00a0step\u00a0.<\/p>\r\n\r\n\r\n\r\n A major advantage\u00a0of\u00a0this\u00a0approach\u00a0is\u00a0that\u00a0the executed analytical\u00a0work\u00a0can\u00a0be\u00a0modified\u00a0and\u00a0run\u00a0again.\u00a0This\u00a0allows seeing or understanding\u00a0how\u00a0changes in\u00a0thresholds\u00a0or\u00a0values\u00a0in\u00a0the input\u00a0data affect\u00a0the results\u00a0of an\u00a0analysis.\u00a0<\/p>\r\n\r\n\r\n\r\n Another\u00a0advantage\u00a0is\u00a0that the\u00a0model\u00a0could\u00a0be\u00a0reused\u00a0in\u00a0others\u00a0territories,\u00a0simply\u00a0changing\u00a0the\u00a0input data.<\/p>\r\n\r\n\r\n\r\n How to open<\/strong>\u00a0the<\/strong>\u00a0graphic<\/strong> modeller<\/strong>\u00a0 The\u00a0graphic modeller can\u00a0be\u00a0opened through\u00a0the\u00a0QGIS\u00a0interface\u00a0using\u00a0one\u00a0of the\u00a0two\u00a0following\u00a0options:\u00a0 \u00a0\u2022\u00a0By activating\u00a0the\u00a0panel\u00a0\u00a0\u00a0Box<\/em><\/strong>processing<\/em><\/strong>tools<\/em><\/strong>\u00a0and\u00a0in\u00a0Models<\/em><\/strong>-><\/em><\/strong>Tools<\/em><\/strong>\u00a0\u00a0\u00a0click\u00a0\u00a0Create<\/em><\/strong>a new<\/em><\/strong>template<\/em><\/strong><\/p>\r\n\r\n\r\n\r\n The\u00a0process\u00a0modeller\u00a0window\u00a0opens\u00a0.\u00a0On the\u00a0left\u00a0side\u00a0of the\u00a0window,\u00a0there\u00a0are\u00a0two\u00a0tabs:\u00a0\u00a0\u00a0input<\/em><\/strong>\u00a0\u00a0\u00a0and\u00a0\u00a0\u00a0algorithms<\/em><\/strong>.\u00a0They\u00a0are used\u00a0to\u00a0add\u00a0these\u00a0two\u00a0types\u00a0of elements\u00a0in\u00a0the window\u00a0graph\u00a0of the\u00a0modeller\u00a0that\u00a0occupies\u00a0the\u00a0rest\u00a0of the\u00a0window.<\/p>\r\n\r\n\r\n\r\n How to set up<\/strong>\u00a0the<\/strong>\u00a0modeller<\/strong>\u00a0and give a name to<\/strong>\u00a0our<\/strong>\u00a0model<\/strong> Before starting a\u00a0model,\u00a0it\u00a0is advisable\u00a0to set up the modeller.\u00a0The\u00a0models\u00a0are\u00a0saved\u00a0as\u00a0files\u00a0in JSON format with\u00a0the extension\u00a0\u00a0\u00a0.model<\/em>\u00a0\u00a0\u00a0.\u00a0When\u00a0you\u00a0save\u00a0a\u00a0template,\u00a0QGIS gives you the option to\u00a0save\u00a0the\u00a0file\u00a0in\u00a0the\u00a0\u00a0\u00a0template<\/strong>folder<\/strong>.\u00a0You\u00a0can\u00a0define\u00a0the location\u00a0of the\u00a0models\u00a0folder\u00a0by\u00a0accessing\u00a0the menu\u00a0\u00a0\u00a0Treatment<\/em><\/strong>|<\/em><\/strong>options<\/em><\/strong>\u00a0\u00a0\u00a0in\u00a0QGIS.\u00a0In\u00a0the section\u00a0Models\u00a0<\/em>\u00a0<\/strong>\u00a0of the\u00a0setting options window,\u00a0you\u00a0can\u00a0specify\u00a0the location\u00a0of the\u00a0templates\u00a0folder.\u00a0Double-\u00a0click\u00a0on the\u00a0default\u00a0folder\u00a0path\u00a0and the button\u00a0\u00a0\u00a0Browse<\/em><\/strong>\u00a0<\/em>\u00a0([…]) is displayed,\u00a0and allows you to\u00a0select\u00a0another\u00a0location:<\/p>\r\n\r\n\r\n\r\n To\u00a0illustrate\u00a0the basics of\u00a0the\u00a0modeller\u00a0graph use\u00a0we\u00a0will\u00a0employ a\u00a0simple\u00a0example\u00a0that\u00a0identifies\u00a0the\u00a0oyster\u00a0plots\u00a0located\u00a0around\u00a0the\u00a0oysters establishments.\u00a0There will be three entries and\u00a0two\u00a0algorithms.\u00a0Firstly,\u00a0we\u00a0will\u00a0give\u00a0\u00a0\u00a0a name to\u00a0our\u00a0model\u00a0as well as to the\u00a0group.\u00a0For\u00a0this\u00a0example,\u00a0as\u00a0shown\u00a0in\u00a0following screenshot\u00a0\u00a0we\u00a0have\u00a0opened\u00a0the\u00a0modeler\u00a0graphicand\u00a0named\u00a0the\u00a0model\u00a0\u00a0\u00a0 riparian<\/em><\/strong>plots<\/em><\/strong>\u00a0and the\u00a0group\u00a0of\u00a0models\u00a0\u00a0\u00a0Oyster<\/em><\/strong>cadastre<\/em><\/strong>\u00a0.\u00a0 Then,\u00a0we\u00a0click\u00a0the\u00a0Save\u00a0button\u00a0.\u00a0\u00a0\u00a0The\u00a0dialog\u00a0box\u00a0\u00a0<\/em><\/strong>Save<\/em><\/strong>Template<\/em><\/strong>\u00a0<\/em>\u00a0opens, by\u00a0default,\u00a0in\u00a0the folder\u00a0\u00a0\u00a0models<\/em>.\u00a0Here\u00a0you\u00a0must\u00a0choose\u00a0a name for the\u00a0file\u00a0\u00a0\u00a0.model.\u00a0We\u00a0will call it\u00a0\u00a0\u00a0riparianplots.model<\/em><\/strong>.\u00a0 <\/em><\/strong><\/p>\r\n\r\n\r\n\r\n \u00a0The\u00a0model\u00a0and the\u00a0group\u00a0name\u00a0have to\u00a0be\u00a0defined\u00a0before\u00a0the\u00a0model\u00a0is\u00a0recorded\u00a0.\u00a0If the\u00a0models\u00a0are\u00a0registered\u00a0in\u00a0the\u00a0default\u00a0templates\u00a0folder\u00a0(..users\u00a0\/ .qgis2 \/ processing \/\u00a0models),<\/em>\u00a0they will\u00a0appear\u00a0as\u00a0layout\u00a0tools\u00a0in\u00a0the\u00a0panel\u00a0of\u00a0the\u00a0processing\u00a0toolbox\u00a0(it\u00a0\u00a0\u00a0will appear\u00a0in this\u00a0group\u00a0in\u00a0the\u00a0processing\u00a0toolbox).<\/p>\r\n\r\n\r\n\r\n <\/p>\r\n\r\n\r\n\r\n The\u00a0model\u00a0appears\u00a0with the name that\u00a0was\u00a0entered in\u00a0the\u00a0graphic\u00a0modeller, as opposed to the\u00a0one\u00a0that\u00a0was\u00a0recorded\u00a0in the\u00a0disc.<\/p>\r\n\r\n\r\n\r\n The\u00a0models\u00a0can\u00a0be\u00a0registered\u00a0outside\u00a0the\u00a0default\u00a0template\u00a0folder,\u00a0but\u00a0in\u00a0this\u00a0case will\u00a0not\u00a0appear\u00a0in\u00a0the\u00a0panel\u00a0of\u00a0the setting\u00a0toolkit.<\/p>\r\n","protected":false},"excerpt":{"rendered":" In\u00a0this\u00a0tutorial, we\u00a0will\u00a0address\u00a0the automation\u00a0processing\u00a0chains\u00a0with\u00a0QGIS\u00a0processing\u00a0modeller.\u00a0We\u00a0will\u00a0see\u00a0how to\u00a0set,\u00a0edit, document and\u00a0run\u00a0a\u00a0template.\u00a0You will\u00a0learn\u00a0how to\u00a0add\u00a0data\u00a0input\u00a0and\u00a0processing\u00a0algorithms\u00a0in\u00a0a\u00a0model.\u00a0We\u00a0will, also,\u00a0discuss how to\u00a0run\u00a0the models\u00a0iteratively\u00a0as well\u00a0as\u00a0how\u00a0to\u00a0fit\u00a0them\u00a0together\u00a0in\u00a0others,\u00a0and how to\u00a0perform the models\u00a0in\u00a0batch mode. Firstly,\u00a0we will\u00a0introduce\u00a0the\u00a0modeller\u00a0and\u00a0explore\u00a0the various types\u00a0of inputs\u00a0and\u00a0algorithms\u00a0available\u00a0for\u00a0the models.\u00a0Then, we\u00a0will discuss, using\u00a0examples\u00a0step\u00a0by\u00a0step, how to\u00a0develop\u00a0a\u00a0model that\u00a0can\u00a0be\u00a0added\u00a0to the\u00a0processing toolbox.\u00a0<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"sfsi_plus_gutenberg_text_before_share":"","sfsi_plus_gutenberg_show_text_before_share":"","sfsi_plus_gutenberg_icon_type":"","sfsi_plus_gutenberg_icon_alignemt":"","sfsi_plus_gutenburg_max_per_row":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1296],"tags":[],"class_list":["post-6527","post","type-post","status-publish","format-standard","hentry","category-posts-en"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t
The\u00a0entire\u00a0analysis\u00a0is, therefore,\u00a0ready\u00a0to\u00a0be\u00a0used, as a personalized tool,\u00a0in\u00a0the\u00a0processing toolbox.<\/p>\r\n\r\n\r\n\r\n
If\u00a0you\u00a0perform\u00a0an\u00a0analysis for the\u00a0selection\u00a0of sites,\u00a0you\u00a0use\u00a0many\u00a0criteria\u00a0through classifications\u00a0according\u00a0to\u00a0specific thresholds\u00a0for\u00a0each\u00a0criterion\u00a0(distance,\u00a0cost, etc.).\u00a0If\u00a0you\u00a0ask at\u00a0the end\u00a0of\u00a0the\u00a0analysis,\u00a0which\u00a0would be\u00a0the\u00a0result\u00a0if\u00a0changing\u00a0one of the\u00a0thresholds,\u00a0if\u00a0you\u00a0have\u00a0performed the analysis\u00a0manually\u00a0step\u00a0by\u00a0step,\u00a0you\u00a0will\u00a0have\u00a0to\u00a0redo\u00a0all\u00a0the\u00a0steps.\u00a0If, on the\u00a0other hand,\u00a0you\u00a0have\u00a0performed the\u00a0analysis\u00a0using\u00a0a\u00a0model,\u00a0you will only have to modify the\u00a0value\u00a0of the\u00a0threshold\u00a0concerned\u00a0and to\u00a0re-execute\u00a0the\u00a0model\u00a0.<\/p>\r\n\r\n\r\n\r\n
\u2022\u00a0By\u00a0clicking\u00a0on\u00a0\u00a0\u00a0\u00a0Graphic<\/em><\/strong>Modeller<\/em><\/strong>\u00a0from the menu\u00a0\u00a0\u00a0Treatment<\/em><\/strong><\/p>\r\n\r\n\r\n\r\n![\"\"](\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2018\/10\/gra1.png?resize=530%2C195&ssl=1\")
<\/figure>\r\n\r\n\r\n\r\n![\"\"](\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2018\/10\/gra2.png?resize=361%2C321&ssl=1\")
<\/figure>\r\n\r\n\r\n\r\n![\"\"](\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2018\/10\/gra3.png?resize=630%2C396&ssl=1\")
<\/figure>\r\n\r\n\r\n\r\n![\"\"](\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2018\/10\/gra4.png?resize=630%2C468&ssl=1\")
<\/figure>\r\n\r\n\r\n\r\n
This\u00a0is\u00a0the\u00a0group\u00a0and the name with\u00a0which\u00a0the\u00a0model\u00a0will appear\u00a0in\u00a0the setting toolbox.<\/p>\r\n\r\n\r\n\r\n![\"\"](\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2018\/10\/gra5.png?resize=630%2C224&ssl=1\")
<\/figure>\r\n\r\n\r\n\r\n![\"\"](\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2018\/10\/gra6.png?resize=630%2C445&ssl=1\")
<\/figure>\r\n\r\n\r\n\r\n![\"\"](\"https:\/\/i0.wp.com\/www.sigterritoires.fr\/wp-content\/uploads\/2018\/10\/gra7.png?resize=266%2C254&ssl=1\")
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