[Qgis-user] connect the dots

[G. Allegri]

Hi Declan,
I had the same need some time ago, but than I decided to follow
different ways in my analysis so I didn't went on on with this. You're
talking about migration paths, so I suppose you have temporal
attributes on your points, or some other kind of sequential index that
makes points logically connected. Right? In such case it wouldn't be
difficult with little scripting: just sort them on the index, and then
loop over their coordinates to build the polyline. It would a nice,
simple, exercise I think... or...am I making things too simple?

bye,
giovanni

2009/11/10 Declan Troy <declan.troy at gmail.com>:
> Hey Richard,
>
> Thanks for the response. Indeed fTools was the first place I looked as it
> seemed the type of functionality that might be there. Perhaps some day, or
> maybe in the rumored Ecological toolbox?
>
> Seemed like the type of operation that many users might have cause to use so
> I was hoping there was an easy way I was just overlooking but perhaps I
> misjudged. Once I get around to learning to write python plugins this should
> be a nice project to start on. Until then I can do this outside of QGIS, I'm
> just periodically attempting to see how far I can get in the hopes of
> shifting over. Each version keeps getting better.
>
> Declan
>
>
> On Nov 9, 2009, at 6:19 AM, Richard Duivenvoorde wrote:
>
>>
>>> Is there a mean in QGIS to convert a series of points to a polyline?
>>> I would like to create some tracklines from series of telemetry
>>> points to summarize movement/migration paths. I hope I've overlooked
>>> something but the commands I see tend to be dissolution rather than
>>> aggregation of features.
>>
>> Hi Declan,
>>
>> don't know a tool like that (but I'm not authorative for that...), but the
>> first thing I think of is the fTools-functionality of Carson Farmer (in
>> Vector menu of Qgis). It already does things like that. Maybe it's worth a
>> feature request to him?
>>
>> Another option would be to write a python plugin for it? Or add it to the
>> plugin-wishes list if you do not want to do it yourself:
>> http://www.qgis.org/wiki/Vector_Support_Wishes
>>
>> Regards,
>>
>> Richard Duivenvoorde
>>
>
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