{"id":1985,"date":"2015-12-10T16:23:39","date_gmt":"2015-12-10T15:23:39","guid":{"rendered":"https:\/\/www.opengis.ch\/?p=1985"},"modified":"2020-04-29T18:57:33","modified_gmt":"2020-04-29T16:57:33","slug":"geometry-generator-symbology","status":"publish","type":"post","link":"https:\/\/www.opengis.ch\/it\/2015\/12\/10\/geometry-generator-symbology\/","title":{"rendered":"Geometry generator symbology"},"content":{"rendered":"

December traditionally is an amazing time since the weather is usually quite forgiving to long working hours.
\nTherefore the first parts of our recent crowdfunding project for 2.5D render<\/a>ing\u00a0have been merged into QGIS master and will be shipped with QGIS 2.14.
\nIt’s something of the sort of development that we really, really, really like here at OPENGIS.ch: an implementation that adds enormous flexibility and enables the user to use QGIS\u00a0in ways that we never thought of.
\nSay hello to geometry generators.<\/strong>
\nGeometry generators allow to use expression syntax to generate a geometry on the fly during the rendering process. The resulting geometry does not have to match with the original geometry type and you can add several differently modified symbol layers on top of each other.<\/p>\n

Examples<\/h3>\n

 
\n\n

How to use it<\/h3>\n

It couldn’t be easier\u00a0to\u00a0use. Open the symbology dialog. Choose geometry generator<\/em> as symbol layer type. Choose what kind of symbol you would like to generate, write your expression and style it in whatever way you like.
\n\"Configuration<\/a>
\n <\/p>\n

It’s your turn<\/h3>\n

Show the world what you can do with it.<\/p>\n

Thanks<\/h3>\n
    \n
  • ADUGA<\/li>\n
  • Regional Council of Picardy<\/li>\n
  • Ville de Nyon<\/li>\n
  • Wetu GIT cc<\/li>\n
  • All other\u00a0crowdfunders<\/li>\n<\/ul>\n

    Special thanks to\u00a0Nicolas Rochard and\u00a0 for the help to bring this project into shape. And to\u00a0Nyall Dawson for\u00a0his invaluable\u00a0inputs throughout the planning and reviewing process.
    \n <\/p>\n","protected":false},"excerpt":{"rendered":"

    \n
    Say hello to geometry generators, a new way to use expression syntax to generate a geometry on the fly during the rendering process.\n<\/div>\n
    \n\n<\/div>\n<\/div>\n","protected":false},"author":3,"featured_media":1987,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[5,15],"tags":[125],"class_list":["post-1985","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-featured","category-qgis","tag-qgis-org"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":1867,"url":"https:\/\/www.opengis.ch\/it\/2015\/11\/02\/qgis-crowdfunding-2-5d-rendering\/","url_meta":{"origin":1985,"position":0},"title":"QGIS Crowdfunding: 2.5D Rendering","author":"Matthias Kuhn","date":"2 Novembre 2015","format":false,"excerpt":"","rel":"","context":"In "3D"","block_context":{"text":"3D","link":"https:\/\/www.opengis.ch\/it\/category\/3d\/"},"img":{"alt_text":"2.5D rendering","src":"https:\/\/i0.wp.com\/www.opengis.ch\/wp-content\/uploads\/2015\/10\/title.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.opengis.ch\/wp-content\/uploads\/2015\/10\/title.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.opengis.ch\/wp-content\/uploads\/2015\/10\/title.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.opengis.ch\/wp-content\/uploads\/2015\/10\/title.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":2245,"url":"https:\/\/www.opengis.ch\/it\/2017\/05\/10\/best-practices-for-writing-python-qgis-expression-functions\/","url_meta":{"origin":1985,"position":1},"title":"Best practices for writing Python QGIS Expression Functions","author":"Matthias Kuhn","date":"10 Maggio 2017","format":false,"excerpt":"Recently there have been some questions and discussions about python based expression functions and how parameters like usesGeometry\u00a0 need\u00a0to be used. 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