[Qgis-user] Stream to feature problem

[Håvard Tveite]

Sorry, this message got messed up - trying again...

Hi Ming,

There is a place where your raster "line" is two pixels wide,
and this is also where the "errors" occurs.

I guess that the raster "line" needs to be properly thinned
(to a one pixel wide skeleton) before running this algorithm.

Håvard

On 28.02.2020 09:09, Håvard Tveite wrote:
> Hi Ming,
> 
> The errors occur where raster "line" is two pixels wide, and
> that is also where you find the "errors".
> (to a one pixel wide skeleton) before running this algorithm.
> 
> Håvard
> 
> On 28.02.2020 01:13, ming han wrote:
>> Hi all
>>       Is qgis has a function like "stream link" in Arcgis which can
>> convert the stream raster to feature.
>>       I tried with raster to vector function in grass and qgis. it has
>> following errors.
>>
>> Cheers
>> Ming
>>
>> image.png
>