Canvas EFB framework: Difference between revisions

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Also see [http://forum.flightgear.org/viewtopic.php?f=3&t=22784 A project to create a source of free geo-referenced instrument charts]


{{cquote
  |<nowiki>we may not even need to run external EFB software, because our integrated scripting system in combination with the Canvas 2D rendering system may provide all the hooks required to render such geo-referenced imagery directly inside FlightGear with very little work needed - we even have http bindings to load images on the fly.</nowiki>
  |{{cite web |url=http://forum.flightgear.org/viewtopic.php?p=206535#p206535
    |title=<nowiki>Re: A project to create a source of free geo-referenced inst</nowiki>
    |author=<nowiki>Hooray</nowiki>
    |date=<nowiki>Sun Apr 20</nowiki>
  }}
}}
{{cquote
  |<nowiki> we should have most building blocks required for this in place, maybe some things are not yet exposed to scripting space currently (but still available in C++) - but being able to run this directly inside FG would be kinda useful obviously, especially because of recent work in this area, especially the tiled map support, HTTP bindings, SGPath exposure (disk access). And being able to directly geo-align raster images has been previously discussed, too</nowiki>
  |{{cite web |url=http://forum.flightgear.org/viewtopic.php?p=206581#p206581
    |title=<nowiki>Re: A project to create a source of free geo-referenced inst</nowiki>
    |author=<nowiki>Hooray</nowiki>
    |date=<nowiki>Mon Apr 21</nowiki>
  }}
}}
{{cquote
  |<nowiki>Right now the script basically just a creates .PNG and a .VRT for a given plate, suitable for loading directly into something like QGIS
If you run the script for the entire set of plates (eg. "multithread.sh .") using the -s option you'll get a statistics file which has all of the lon/lat extents for each plate in it (which is how I made the spreadsheet I linked here)
</nowiki>
  |{{cite web |url=http://forum.flightgear.org/viewtopic.php?p=206589#p206589
    |title=<nowiki>Re: A project to create a source of free geo-referenced inst</nowiki>
    |author=<nowiki>jlmcgraw</nowiki>
    |date=<nowiki>Mon Apr 21</nowiki>
  }}
}}
{{cquote
  |<nowiki>extending our 2D rendering API (Canvas) to provide a mechanism to geo-align such images would be kinda useful for a variety of purposes, we already have a "map" element that can automatically geo-reference lat/lon pairs without any manual work involved - and we also have support for a raster image element.</nowiki>
  |{{cite web |url=http://forum.flightgear.org/viewtopic.php?p=206592#p206592
    |title=<nowiki>Re: A project to create a source of free geo-referenced inst</nowiki>
    |author=<nowiki>Hooray</nowiki>
    |date=<nowiki>Mon Apr 21</nowiki>
  }}
}}


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