[Qgis-user] Null values in PostGIS

[samuelmesa at gmail.com]

Bug reported in:

http://hub.qgis.org/issues/9998

Samuel Mesa.


2014-04-02 23:48 GMT-05:00 samuelmesa at gmail.com <samuelmesa at gmail.com>:

> Thanks for your answer Alex.
>
> regards,
>
> Samuel Mesa
>
>
> 2014-04-02 22:31 GMT-05:00 Alex Mandel <tech_dev at wildintellect.com>:
>
> On 04/02/2014 08:19 PM, samuelmesa at gmail.com wrote:
>> > Hello. I have a layer of meteorological stations with temporal
>> information
>> > in PostGIS. Some of the stations have variables with null values. In
>> QGIS v2.3
>> > (Ubuntu 13.10), null values are displayed correctly in the attribute
>> table.
>> > However, when displaying the label is treated as a value of 0,
>> similarly when
>> > I perform an operation interpolation (IDW algorithm from the raster
>> menu),
>> > where this result should ignore null values stations.
>> >
>> > My question is, is this a bug in QGIS?.
>> >
>> > Attached a screenshot trying to explain the results of interpolation and
>> > labeled, possibly wrong with null values.
>> >
>> > https://drive.google.com/file/d/0B9J3L0xnIeLZLWRtSkJLeXp1RzA
>> >
>> > regards,
>> >
>> > Samuel Mesa,
>> >
>>
>> Might be a bug, I would suggest creating a Postgis View that filters out
>> the nulls and work with that.
>>
>> Thanks,
>> Alex
>>
>>
>
>
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