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UID:pretalx-foss4g-2022-NBAABN@talks.staging.osgeo.org
DTSTART;TZID=CET:20220825T100500
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DESCRIPTION:## The Problem\nLet's assume you have an attribute-focused tabl
 e\, but you would still like to see a thumbnail of the associated geometry
 . Or more generally: How to dynamically render polygon geometries in a HTM
 L page without any mapping library. **Enter ST_AsSVG (PostGIS function)!**
 \n\n## Context\nLast year [I showed how we display geo data in our webapps
  using vector tiles (ST_AsMVT)](https://www.youtube.com/watch?v=s_dWBOiuFi
 Y&t=139s). This year I will explain how we apply ST_AsSVG of PostGIS on da
 tabase records to **create beautiful geo-infographics** in pure HTML. The 
 result is a geo-visualization similar to this one: [Comparison maps of Aus
 tralian Cities (Size\, Population)](https://imgur.com/OQClpbc). The tricki
 est part will be the sizing of the SVG objects ([viewport vs. viewBox](htt
 ps://webdesign.tutsplus.com/tutorials/svg-viewport-and-viewbox-for-beginne
 rs--cms-30844)).\n\n## Content\nThe talk will contain some theory on SVG. 
 It will then show basic setups for FastAPI\, SQLModel\, Jinja2 and\, of co
 urse\, PostGIS. All code will be made available via GitHub. \n\n## Aim\nAf
 ter the talk you will master sizing of SVG and be capable of creating your
  own dynamic geo-infographics directly from data stored in your PostGIS da
 tabase.
DTSTAMP:20260404T011959Z
LOCATION:Room 9
SUMMARY:Geo-Infographics created dynamically from PostGIS using ST_AsSVG - 
 Stefan Brand
URL:https://talks.staging.osgeo.org/foss4g-2022/talk/NBAABN/
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