<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Where does TopoJSON fit in this picture?<br><br><div><br></div><div><br></div>--<div><div style="font-family: Helvetica; font-size: medium; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-text-size-adjust: auto; ">Puneet Kishor</div><div style="font-family: Helvetica; font-size: medium; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-text-size-adjust: auto; ">Policy Coordinator for Science and Data</div><div style="font-family: Helvetica; font-size: medium; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-text-size-adjust: auto; ">Creative Commons</div></div></div><div><br>On Aug 20, 2013, at 9:01 PM, Jody Garnett <<a href="mailto:jody.garnett@gmail.com">jody.garnett@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">Sounds interesting, any alternative to BinaryXML would be welcome.<div><br></div><div style="">The header of Binary XML was very complicated, extending into information such as endian order. I got the impression it was set up around with a server bias. The result was a specification which was difficult to implement as a client, and has seen only one implementation in open source products I am aware of (in the gvSig community).</div>
<div style=""><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Aug 20, 2013 at 6:27 AM, Nicklas Avén <span dir="ltr"><<a href="mailto:nicklas.aven@jordogskog.no" target="_blank">nicklas.aven@jordogskog.no</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hallo<br>
<br>
I do not know if this list is the right place so that will be my first<br>
question.<br>
<br>
I have a naive idea about a compressed binary format for geometries.<br>
<br>
I have done some work to sketch what it is about.<br>
<br>
The name so far is TWKB (Tiny WKB)<br>
<br>
Can this list be the right place to discuss this format. It is just an<br>
embryo, and my hope is that it can be something designed by and hard<br>
connected to the FOSS4G-community.<br>
<br>
<br>
What is done is:<br>
<br>
A draft of a spec:<br>
<a href="https://github.com/nicklasaven/TWKB/blob/master/twkb.md" target="_blank">https://github.com/nicklasaven/TWKB/blob/master/twkb.md</a><br>
<br>
including ideas from Evan Rouault and Oliver Tonnhofer<br>
<br>
<br>
Demos:<br>
Streaming TWKB from PostGIS to Leaflet via websocket.<br>
<a href="http://178.79.156.122/twkb_node/" target="_blank">http://178.79.156.122/twkb_node/</a><br>
<br>
Streaming TWKB-aggregates (tiles created on the fly) from PostGIS to<br>
Leaflet<br>
<a href="http://178.79.156.122/twkb_agg" target="_blank">http://178.79.156.122/twkb_agg</a><br>
<br>
A page to compare twkb in timing and size with geoJSON directly from<br>
PostGIS.<br>
<a href="http://178.79.156.122/twkb_test" target="_blank">http://178.79.156.122/twkb_test</a><br>
<br>
<br>
Examples of implementation.<br>
The PostGIS part is in the trunk:<br>
<a href="http://svn.osgeo.org/postgis/trunk/" target="_blank">http://svn.osgeo.org/postgis/trunk/</a><br>
<br>
The client parts is exemplified here:<br>
<a href="https://github.com/nicklasaven/twkb_web" target="_blank">https://github.com/nicklasaven/twkb_web</a><br>
<br>
<br>
So, first, can this list host discussions about TWKB (or whatever name<br>
it gets)?<br>
If not where should it go?<br>
<br>
Second, any feedback is very welcome<br>
<br>
<br>
<br>
Best Regards<br>
<br>
Nicklas Avén<br>
<br>
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</blockquote></div><br></div>
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