Re: [Qgis-user] QGIS airlines: connecting airports with lines ?

[C Hamilton]

The "XY to Line" tool in the "Shape Tools" plugin can draw the lines. Just
prepare your data so that there are starting and ending latitudes and
longitudes and "XY to Line" will do the rest. It draws the shortest path
between the two points which gives the curved appearance.

Good luck,

Calvin

On Mon, Mar 27, 2017 at 1:25 AM, Alex Mandel 
wrote:

> It's not super hard.
> 1. Download the data
> 2. Import it to GIS (probably comes in text file, so some conversion
> will be needed.)
> 3. Densify the lines, or create lines between the pairs of airports.
> Point 2 Lines plugin should help. You need to make sure to add nodes
> along the way (Densify), otherwise the lines won't curve nicely. There's
> a little trial and error to get them dense enough without making to many
> nodes.
>
> I used this data set for a cartography class 5+ years ago, it's a fun
> one. You can see a couple of examples here
> http://geography.ucdavis.edu/gallery/classes/geo-290-f10-cartography
>
> Enjoy,
> Alex
>
> On 03/25/2017 05:06 PM, Falk Huettmann wrote:
> > Hi there,
> >
> > I have a question, if I may:
> >
> > at the following website
> >
> > http://openflights.org/data.html
> >
> > there are these maps of airlines, connecting airports.
> >
> > http://openflights.org/demo/openflights-routedb-2048.png
> >
> > The actual map and code can apparently be bought,
> > but instead I am looking for a self-made solution (I do not like how
> people
> > cash in on a GIS bottleneck).
> >
> > Would you perhaps know how that map can be done, e.g.
> > in QGIS or related in an OpenGIS framework or code?
> >
> > Thanks so much; kind regards
> >  Falk
> >
> >
> >
> > ___
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> >
>
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Re: [Qgis-user] QGIS airlines: connecting airports with lines ?

[Alex Mandel]

It's not super hard.
1. Download the data
2. Import it to GIS (probably comes in text file, so some conversion
will be needed.)
3. Densify the lines, or create lines between the pairs of airports.
Point 2 Lines plugin should help. You need to make sure to add nodes
along the way (Densify), otherwise the lines won't curve nicely. There's
a little trial and error to get them dense enough without making to many
nodes.

I used this data set for a cartography class 5+ years ago, it's a fun
one. You can see a couple of examples here
http://geography.ucdavis.edu/gallery/classes/geo-290-f10-cartography

Enjoy,
Alex

On 03/25/2017 05:06 PM, Falk Huettmann wrote:
> Hi there,
> 
> I have a question, if I may:
> 
> at the following website
> 
> http://openflights.org/data.html
> 
> there are these maps of airlines, connecting airports.
> 
> http://openflights.org/demo/openflights-routedb-2048.png
> 
> The actual map and code can apparently be bought,
> but instead I am looking for a self-made solution (I do not like how people
> cash in on a GIS bottleneck).
> 
> Would you perhaps know how that map can be done, e.g.
> in QGIS or related in an OpenGIS framework or code?
> 
> Thanks so much; kind regards
>  Falk
> 
> 
> 
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Re: [Qgis-user] QGIS airlines: connecting airports with lines ?

[Michael Treglia]

Also, there were a couple of blog posts from Anita Graser recently that
look relevant (disclaimer: I have not yet given them a good read...). See
the recent posts here: https://anitagraser.com/2017/02/03/gradient-arrows/
and https://anitagraser.com/2016/12/30/new-style-flow-map-arrows/

Cheers
Mike



Please pardon any typos, this message was sent from a mobile device.

On Mar 26, 2017 7:02 PM, "Michael.Dodd" <michael.d...@open.ac.uk> wrote:

> The code to do this kind of thing has been in qgis for long time e.g. I
> published this map http://zookeys.pensoft.net/
> articles.php?id=4633_type=element_type=2&
> element_id=14_name= back in 2015 and had drawn it in qgis long
> time before it was published.  The difference is that the lines are
> straight not curved but in my case I wanted straight lines.
> --
> *From:* Qgis-user <qgis-user-boun...@lists.osgeo.org> on behalf of Falk
> Huettmann <fhuettm...@alaska.edu>
> *Sent:* 26 March 2017 00:06:18
> *To:* qgis-user
> *Subject:* [Qgis-user] QGIS airlines: connecting airports with lines ?
>
>
> Hi there,
>
> I have a question, if I may:
>
> at the following website
>
> http://openflights.org/data.html
>
> there are these maps of airlines, connecting airports.
>
> http://openflights.org/demo/openflights-routedb-2048.png
>
> The actual map and code can apparently be bought,
> but instead I am looking for a self-made solution (I do not like how
> people cash in on a GIS bottleneck).
>
> Would you perhaps know how that map can be done, e.g.
> in QGIS or related in an OpenGIS framework or code?
>
> Thanks so much; kind regards
>  Falk
>
>
> ___
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>
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Re: [Qgis-user] QGIS airlines: connecting airports with lines ?

[Michael . Dodd]

The code to do this kind of thing has been in qgis for long time e.g. I 
published this map 
http://zookeys.pensoft.net/articles.php?id=4633_type=element_type=2_id=14_name=
 back in 2015 and had drawn it in qgis long time before it was published.  The 
difference is that the lines are straight not curved but in my case I wanted 
straight lines.


From: Qgis-user <qgis-user-boun...@lists.osgeo.org> on behalf of Falk Huettmann 
<fhuettm...@alaska.edu>
Sent: 26 March 2017 00:06:18
To: qgis-user
Subject: [Qgis-user] QGIS airlines: connecting airports with lines ?


Hi there,

I have a question, if I may:

at the following website

http://openflights.org/data.html

there are these maps of airlines, connecting airports.

http://openflights.org/demo/openflights-routedb-2048.png

The actual map and code can apparently be bought,
but instead I am looking for a self-made solution (I do not like how people 
cash in on a GIS bottleneck).

Would you perhaps know how that map can be done, e.g.
in QGIS or related in an OpenGIS framework or code?

Thanks so much; kind regards
 Falk

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[Qgis-user] QGIS airlines: connecting airports with lines ?

[Falk Huettmann]

Hi there,

I have a question, if I may:

at the following website

http://openflights.org/data.html

there are these maps of airlines, connecting airports.

http://openflights.org/demo/openflights-routedb-2048.png

The actual map and code can apparently be bought,
but instead I am looking for a self-made solution (I do not like how people
cash in on a GIS bottleneck).

Would you perhaps know how that map can be done, e.g.
in QGIS or related in an OpenGIS framework or code?

Thanks so much; kind regards
 Falk
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