[Qgis-user] Spatial Query with buffer?

James Keener jim at jimkeener.com
Wed May 6 09:26:38 PDT 2015


Ah! Good point! I forgot that spatialite can handle complex queries.

For reference, Jorish, spatialite is a sqlite database with geospatial support. Sqlite is a (really super cool) library that supports single file databases that can be queried via SQL.

Jim

On May 6, 2015 11:50:43 AM EDT, David Fawcett <david.fawcett at gmail.com> wrote:
>If you don't have an easy way to set up PostGIS, you could use QGIS to
>save
>your data in a SpatiaLite database, and then write a spatial query
>against
>that.
>
>On Wed, May 6, 2015 at 10:42 AM, DelazJ <delazj at gmail.com> wrote:
>
>> Hi,
>> May be you can use the graphical modeler of Processing to design your
>> process. Processing offers both spatial selection and buffer tools.
>>
>> 2015-05-06 17:08 GMT+02:00 Joris Hintjens <jorishin at gmail.com>:
>>
>>> All my data is in shape.
>>> Have a look at postgis is on my urgent to do list. Never worked with
>>> postgis until now
>>>
>>>
>>>
>>> 2015-05-06 16:37 GMT+02:00 James Keener <jim at jimkeener.com>:
>>>
>>>> What's your data source? If it's PostGIS a query could do that in a
>>>> mostly straightforward way.
>>>>
>>>> Jim
>>>>
>>>> On May 6, 2015 10:32:38 AM EDT, Joris Hintjens <jorishin at gmail.com>
>>>> wrote:
>>>>
>>>>> Hello,
>>>>> I want to do a spatial query.
>>>>> Which Polygones intersect with a series of points,... That is easy
>with
>>>>> the spatial query plugin.
>>>>> BUT: Which polygones intersect with a buffer of X around my
>points...
>>>>> How can I do that without creating a new layer where I buffer my
>points?
>>>>> My points are not static, they change often, so creating a buffer
>layer
>>>>> would require also an update of the buffer layer. Too complicated
>(and
>>>>> source of errors!) to my taste...
>>>>>
>>>>> All suggestions welcome.
>>>>>
>>>>> Joris
>>>>>
>>>>> ------------------------------
>>>>>
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>>>>> Qgis-user at lists.osgeo.org
>>>>> http://lists.osgeo.org/mailman/listinfo/qgis-user
>>>>>
>>>>>
>>>> --
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>brevity.
>>>>
>>>
>>>
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