[Qgis-user] vector point grid to raster grid -- pixel size does not work

[Priv.-Doz. Dr. Maria Shinoto]

Chris, 

Thank you for your ideas. I am trying now, but there are some questions: 

> For this, rather than use the Raster > Rasterize tool, the approach should be:
> 	• open the processing toolbox Processing > Toolbox
> 	• in the toolbox open Interpolation > TIN interpolation

OK until this point


> 	• in the TIN Interpolation screen:
> 		• select the Vector layer

OK. 

> 		• select the Interpolation attribute

First problem: I stored the vector layer in a Geopackage; so I have an fid from the geopackage database, an ID from the original xyz-File in field_1, and the x, y, z values in field_2, _3 and _4. 

Which attribute should I choose?  I think only field_2 and field_3?

There is a checkbox for the Z-coordinate, whether I with to use it for interpolation. I guess I leave unchecked?

> 		• click the + to add to the vector layer panel

So I added the two fields, they are "Points"

> 		• choose the interpolation method - probably best to use cubic
> 		• click on the ... next to extent and set it to the layer extent

OK

> 		• set the pixel size to 5.0 and 5.0

OK

> 		• click Run

OK

> This way you won't have the odd sizes you mentioned.  This may give you a smoother surface in the end as well.

I started the prozess, but with more than 11 Million points, it seems to take too long, I am stuck at 50%. Will try later again.

Best, 
Maria


> 
> 
> -- 
> Chris Hermansen · clhermansen "at" gmail "dot" com
> 
> C'est ma façon de parler.