{"id":304,"date":"2016-02-19T17:59:45","date_gmt":"2016-02-19T16:59:45","guid":{"rendered":"http:\/\/ku-gis.dk\/blog\/?p=304"},"modified":"2016-02-22T19:46:36","modified_gmt":"2016-02-22T18:46:36","slug":"graesklipning-beregning-af-laengder","status":"publish","type":"post","link":"http:\/\/ku-gis.dk\/blog\/graesklipning-beregning-af-laengder\/","title":{"rendered":"Gr\u00e6sklipning &#8211; beregning af l\u00e6ngder"},"content":{"rendered":"<p>I et af fagene p\u00e5 <a href=\"http:\/\/ign.ku.dk\/have-parkingenioer\/\">Have- og parkingeni\u00f8r uddannelsen<\/a> p\u00e5 Skovskolen, arbedjes der med gr\u00e6s. Herunder ogs\u00e5 hvilke maskiner der anvendes til klipning af gr\u00e6s.<\/p>\n<p>I GIS udregner vi hvor mange baner gr\u00e6sklipperen skal k\u00f8re for at sl\u00e5 hele gr\u00e6spl\u00e6nen. Det kan selvf\u00f8lgelig kun blive estimater, da der skal tages hensyn til terr\u00e6net, forhindringer og meget mere.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-305\" src=\"http:\/\/ku-gis.dk\/blog\/wp-content\/uploads\/2016\/02\/grass.jpg\" alt=\"grass\" width=\"630\" height=\"588\" srcset=\"http:\/\/ku-gis.dk\/blog\/wp-content\/uploads\/2016\/02\/grass.jpg 630w, http:\/\/ku-gis.dk\/blog\/wp-content\/uploads\/2016\/02\/grass-300x280.jpg 300w, http:\/\/ku-gis.dk\/blog\/wp-content\/uploads\/2016\/02\/grass-321x300.jpg 321w\" sizes=\"(max-width: 630px) 100vw, 630px\" \/><\/p>\n<p>I denne lille \u00f8velse arbejder vi med en klipper der har en klippebredde p\u00e5 1,55 m. Hvor mange meter skal der k\u00f8res. Der tages desuden hensyn til hvor mange gange der skal foretages en vending med maskinen.<\/p>\n<p><strong>Arbejdsgang<\/strong><\/p>\n<ul>\n<li>Opret et tempor\u00e6rt polygon lag<\/li>\n<li>Tegn en polygon omkring gr\u00e6spl\u00e6nen<\/li>\n<li>Opret en buffer p\u00e5 klippebredden (-1,5 meter p\u00e5 polygonen)<br \/>\nProcessing: <em>Fixed distance buffer<\/em><\/li>\n<li>Konverter buffer til en linje Processing: <em>Convert polygon to Line<\/em><\/li>\n<li>M\u00e5l vinklen p\u00e5 retningen med Plugin <em>Advanced digitizing<\/em><\/li>\n<li>Opret et vector grid <em>Vector&gt;Vector Grid<\/em><\/li>\n<li>Klip grid med buffer Processing: <em>Clip vectors by Polygon<\/em><\/li>\n<li>Luk &#8216;kliplinie&#8217; og buffer<\/li>\n<li>S\u00e6t style med Marker og v\u00e6lg en pil som s\u00e6ttes i center<\/li>\n<li>Opdater r\u00e6kkenummer <em>I Fieldcalculator &#8211; Update Row_Number<\/em><\/li>\n<li>Marker hver anden linje for ID i Select by Expression<em> ID % 2=0<\/em><\/li>\n<li>Vend retningen p\u00e5 linjen\u00a0 Plugin: Digitizing tools <em>Flip selected linies<\/em><\/li>\n<li>Beregn i Plugin Group Stat: <em>Count &#8216;id&#8217;<\/em> og <em>Sum Length<\/em><\/li>\n<\/ul>\n<p><a href=\"http:\/\/screencast.com\/t\/sRYihvZhMtpf\">Video med eksempel <img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-large wp-image-306\" src=\"http:\/\/ku-gis.dk\/blog\/wp-content\/uploads\/2016\/02\/grasvideo-1024x592.jpg\" alt=\"grasvideo\" width=\"584\" height=\"338\" srcset=\"http:\/\/ku-gis.dk\/blog\/wp-content\/uploads\/2016\/02\/grasvideo-1024x592.jpg 1024w, http:\/\/ku-gis.dk\/blog\/wp-content\/uploads\/2016\/02\/grasvideo-300x174.jpg 300w, http:\/\/ku-gis.dk\/blog\/wp-content\/uploads\/2016\/02\/grasvideo-768x444.jpg 768w, http:\/\/ku-gis.dk\/blog\/wp-content\/uploads\/2016\/02\/grasvideo-500x289.jpg 500w, http:\/\/ku-gis.dk\/blog\/wp-content\/uploads\/2016\/02\/grasvideo.jpg 1231w\" sizes=\"(max-width: 584px) 100vw, 584px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I et af fagene p\u00e5 Have- og parkingeni\u00f8r uddannelsen p\u00e5 Skovskolen, arbedjes der med gr\u00e6s. Herunder ogs\u00e5 hvilke maskiner der anvendes til klipning af gr\u00e6s. I GIS udregner vi hvor mange baner gr\u00e6sklipperen skal k\u00f8re for at sl\u00e5 hele gr\u00e6spl\u00e6nen. &hellip; <a href=\"http:\/\/ku-gis.dk\/blog\/graesklipning-beregning-af-laengder\/\">L\u00e6s resten <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"_links":{"self":[{"href":"http:\/\/ku-gis.dk\/blog\/wp-json\/wp\/v2\/posts\/304"}],"collection":[{"href":"http:\/\/ku-gis.dk\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ku-gis.dk\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ku-gis.dk\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/ku-gis.dk\/blog\/wp-json\/wp\/v2\/comments?post=304"}],"version-history":[{"count":3,"href":"http:\/\/ku-gis.dk\/blog\/wp-json\/wp\/v2\/posts\/304\/revisions"}],"predecessor-version":[{"id":314,"href":"http:\/\/ku-gis.dk\/blog\/wp-json\/wp\/v2\/posts\/304\/revisions\/314"}],"wp:attachment":[{"href":"http:\/\/ku-gis.dk\/blog\/wp-json\/wp\/v2\/media?parent=304"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ku-gis.dk\/blog\/wp-json\/wp\/v2\/categories?post=304"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ku-gis.dk\/blog\/wp-json\/wp\/v2\/tags?post=304"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}