[Qgis-user] [QGIS-Developer] Geodesic Line Simplification

[Áron Gergely]

Hi Calvin and list,

Have you looked at the GRASS GIS v.generalize tool? 
https://grass.osgeo.org/grass64/manuals/v.generalize.html

The Douglas-Peucker algorithm is implemented there and I have used that 
with (topologic)success recently on many touching polygons. Should work 
for polylines too!

Best regards,
Aron

On 01/10/2019 08:19, Tim Sutton wrote:
> Hi
>
>> On 26 Sep 2019, at 17:13, C Hamilton <adenaculture at gmail.com 
>> <mailto:adenaculture at gmail.com>> wrote:
>>
>> Are there any geodesic QGIS algorithms that simplify lines? 
>> "Simplify" just uses the projection units of measure. If there isn't 
>> I thought I would add this to the Shape Tools plugin. I could easily 
>> implement the Douglas-Peucker algorithm using geodesic math.
>>
>> For GPS tracks I also see a need to throw out all points that are 
>> less than a certain distance or less than a certain time interval. I 
>> don't see any simplification algorithms that make use of time. Am I 
>> just missing them?
>
> No I don’t think we have any time based simplifiers - would be a great 
> addition!
>
> Regards
>
> Tim
>
>
>
>>
>> Thanks,
>>
>> Calvin
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> *Tim Sutton*
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