[Qgis-user] wkt multipoint via delimited text requires internal parens

[Andreas Plesch]

Hi, I could narrow down the error to negative coordinates:

This works on the console:
>>> QgsGeometry.fromWkt('MULTIPOINTZ(2 2 4,3 3 4)').exportToWkt()
u'MultiPointZ ((2 2 4),(3 3 4))'

But this does not:

>>> QgsGeometry.fromWkt('MULTIPOINTZ(-2 2 4,3 3 4)').exportToWkt()
Traceback (most recent call last):
  File "<input>", line 1, in <module>
AttributeError: 'NoneType' object has no attribute 'exportToWkt'

So negative coordinates do not work without parentheses, surprisingly.
Perhaps some oversight in parsing.

But negative coordinates work with parentheses:

>>> QgsGeometry.fromWkt('MULTIPOINTZ((-2 2 4),(3 3 4))').exportToWkt()
u'MultiPointZ ((-2 2 4),(3 3 4))'

If there are no objections, I will file a report on the bug tracker.

-Andreas


On Tue, Jul 11, 2017 at 7:09 PM, Andreas Plesch <andreasplesch at netscape.net>
wrote:

> Hi
>
> Using 2.18.3, I found that Add Delimited Text Layer required a WKT of the
> form:
>
> MULTIPOINT Z ((-119.00 34.82 1487),(-119.01 34.81 1450))
>
> rather than just
>
> MULTIPOINT Z (-119.00 34.82 1487,-119.01 34.81 1450)
>
> without the internal parentheses which is also allowed, and perhaps more
> common.
>
> I searched through the bug tracker for 'MULTIPOINT' but could not find a
> relevant issue.
>
> Did anybody come across this ?
>
> On a related note, I did this in order to convert a LINESTRINGZ to POINTZ
> since the Extract Nodes tool did not preserve Z. CSV Exporting, text
> editing and reimporting as MULTIPOINTZ seemed the easiest option. Is there
> another option ?
>
> Thanks, Andreas
>
> --
> Andreas Plesch
> 39 Barbara Rd.
> Waltham, MA 02453
>
>
>
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