[Qgis-user] gridding with a polygon

[Nigel Berjak - S3 Technologies]

Hi Byron

As far as I can tell, you could create a negative sized buffer from the 
extent of the primary geologic dataset (use square and mitre results, 
not rounded, for buffering), then clip the primary dataset using the 
negative buffer to remove the unwanted zero contours.

Cheers.

---
Regards,

Nigel Berjak
S3 Technologies
Geographic Information Systems & Large Format Printing specialists
T: +27 33 3423681
F: +27 86 6721242
E: nigel at S3.co.za
Website: http://www.S3.co.za

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On 2024-05-02 19:07, Byron Veilleux via QGIS-User wrote:

> i have a large geologic dataset that i want to grid and contour.
> There is an irregular zero edge that bounds these data on one side and
> a straight bounding area edge on the other sides.  If i create an 
> irregular polygon that encloses these data, is there a way to grid and 
> contour such that these data are truncated against the polygon and do 
> not extend beyond? --
> 
> Byron Veilleux, MSc. P.Geo
> Conjugate Geologic Services Limited
> Calgary, Alberta Canada
> byron at conjugategeo.com
> Cell:4037108414
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