[Ottawa_users] Ottawa_users Digest, Vol 109, Issue 2 - Voronoi
Javed Syed
motivism at yahoo.com
Tue Apr 12 14:42:56 PDT 2016
Thank you Fabien, looking fwd to Voronoi talk - Javed
--------------------------------------------
On Sun, 4/10/16, ottawa_users-request at lists.osgeo.org <ottawa_users-request at lists.osgeo.org> wrote:
Subject: Ottawa_users Digest, Vol 109, Issue 2
To: ottawa_users at lists.osgeo.org
Received: Sunday, April 10, 2016, 3:00 PM
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Today's Topics:
1. Presentation on Apr 21 (Fabien
Ancelin)
2. Re: Presentation on Apr 21 (Jérôme
St-Louis)
----------------------------------------------------------------------
Message: 1
Date: Sat, 9 Apr 2016 17:19:39 -0400
From: Fabien Ancelin <fabien.ancelin at gmail.com>
To: "Ottawa (Canada) Local Chapter List"
<ottawa_users at lists.osgeo.org>
Subject: [Ottawa_users] Presentation on Apr 21
Message-ID:
<CAPD=wVVNbmnddGvuthpjmQBLf_Vx688qYPxZZkL+Kv9RMi9u4w at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hi folks,
For April 21st, I will give a quick talk on Voronoi Cell
generation using
line and point input using line and point inputs.
Most GIS software allow user to generate Voronoi cells from
points. It
becomes a challenge to generate Voronoi cells with line and
points, making
certain problem difficult to solve. In order to support
some work I have
done for Esri Canada, I have created / contributed and used
two APIs in
Python and .NET that can be used to solve those problems.
Those API are
mainly enhanced wrappers around the C++ Boost Voronoi API (
http://www.boost.org/doc/libs/1_54_0/libs/polygon/doc/voronoi_main.htm).
On April 21st, I want introduce you to the kind of problems
those wrapper
can solve from a GIS perspective, and I hope to trigger a
reaction from you
there. I will present how to prepare your GIS data to be
usable by the
those API, and how to use the output of the boost library to
find the
answers to your GIS problems. Finally, I will give you a
quick introduction
on how to use those wrappers in C# and python and gave you a
demonstration.
Those two API I will present are Open Source, and available
on github:
- SharpBoostVoronoi, developped by me is
the C# wrapper:
https://github.com/fabanc/SharpBoostVoronoi
- PyVoronoi is developed by Voxel8.
Originally designed to returns
Voronoi segments only for 3D printing, I
have contributed to that library
so that it returns Voronoi cells object
and support point and line input.
The latter change is actually a fresh
update I just pushed to the master
branch. It's approval is still pending but
the code is available online as
well. Hopefully the code get merged soon
enough. The url of the master
project is https://github.com/Voxel8/pyvoronoi
The presentation will be between 15 and 30 minutes based on
people's
interest. Let Jerome and Javed know who will be planning to
attend early.
This way, we can book the big room if that's required.
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Message: 2
Date: Sat, 9 Apr 2016 17:27:40 -0400
From: Jérôme St-Louis <jerstlouis at gmail.com>
To: ottawa_users at lists.osgeo.org
Subject: Re: [Ottawa_users] Presentation on Apr 21
Message-ID: <570973CC.1060205 at gmail.com>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
I'm really looking forward to it Fabien!
Plan for 30 minutes :)
On 2016-04-09 5:19 PM, Fabien Ancelin wrote:
> Hi folks,
>
>
> For April 21st, I will give a quick talk on Voronoi
Cell generation
> using line and point input using line and point
inputs.
>
> Most GIS software allow user to generate Voronoi cells
from points. It
> becomes a challenge to generate Voronoi cells with line
and points,
> making certain problem difficult to solve. In
order to support some
> work I have done for Esri Canada, I have created /
contributed and
> used two APIs in Python and .NET that can be used
to solve those
> problems. Those API are mainly enhanced wrappers around
the C++ Boost
> Voronoi API
> (http://www.boost.org/doc/libs/1_54_0/libs/polygon/doc/voronoi_main.htm).
>
> On April 21st, I want introduce you to the kind of
problems those
> wrapper can solve from a GIS perspective, and I hope to
trigger a
> reaction from you there. I will present how to prepare
your GIS data
> to be usable by the those API, and how to use the
output of the boost
> library to find the answers to your GIS problems.
Finally, I will give
> you a quick introduction on how to use those wrappers
in C# and python
> and gave you a demonstration.
>
> Those two API I will present are Open Source, and
available on github:
>
> * SharpBoostVoronoi, developped by me
is the C# wrapper:
> https://github.com/fabanc/SharpBoostVoronoi
> * PyVoronoi is developed by Voxel8.
Originally designed to returns
> Voronoi segments only for 3D
printing, I have contributed to that
> library so that it returns
Voronoi cells object and support point
> and line input. The latter
change is actually a fresh update I
> just pushed to the master
branch. It's approval is still pending
> but the code is available
online as well. Hopefully the code get
> merged soon enough. The url of
the master project is
> https://github.com/Voxel8/pyvoronoi
>
> The presentation will be between 15 and 30 minutes
based on people's
> interest. Let Jerome and Javed know who will be
planning to attend
> early. This way, we can book the big room if that's
required.
>
>
> _______________________________________________
> Ottawa_users mailing list
> Ottawa_users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/ottawa_users
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