[QGIS-Developer] PyQGIS: Convert 25 meters to layer crs?

Raymond Nijssen r.nijssen at terglobo.nl
Sun May 28 11:16:19 PDT 2017

Hi Magnus,

As I understand you are writing a script that should perform a 25m 
buffer on any user layer?

I think you should never buffer unprojected layers. So blocking the 
process and telling the user to transform the data to an appropriate 
projection would be best in my opinion.

If you really want your script to be user friendly, you could find the 
most suitable utm zone for the dataset, project, buffer and reproject.

Good luck,

BTW, at the equator 25m is about 0.000225 degrees, because 360 degrees / 
40.000.000 meters * 25.
But I did not tell you this. ;)

On 28-05-17 14:07, Magnus Homann wrote:
> What's a good way to convert 25 meters (for example) to layer 
> coordinates? I want to create a buffer of 25 meters on my geometries, 
> and handle the case when they layer is in wgs84.
> /Magnus
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