Hi Giovanni,
thanks for your hints !
Most of the mentioned methods I know more or less.
Important for the evaluation of an interpolation's reliability is a review
of the variogram and some statistical values. This should be also possible
in QGIS, as far as I could see until now - if not directly, then via R or a
GRASS plugin.
This would be more than I have now in a proprietary groundwater database
management system with integrated interpolation functionality. That's why I
am looking for an alternative processing option.
I am about to develop a subject for a master thesis in geoinformatics. First
of all I want to check what is present in the field in order to decide what
I can manage and contribute to proceed in this application field.
tanto gracie e saluti,
Christine
-----Ursprüngliche Nachricht-----
Von: "G. Allegri" <gioha...@gmail.com>
Gesendet: 26.05.2011 00:21:46
An: "Christine Schmidt" <c.schm...@geotguide.de>
Betreff: Re: Re: [Qgis-user] Processing of Groundwater Databases with QGIS
Spatial interpolation can be realized in many ways. There are lot
different methods, which fit different needs.
- Inverse Distance Weighting (IDW)
- B-Splines
- Kriging
- Statistical simulations
- etc.
As you know, none of them is correct without a knowledge of the
groundwater structure and stratygraphy. Anyway, in general, for this
kind of elaborations, IDW and kriging are mostly used.
AFAIK, QGis can do IDW [1], while the other methods will need external
softwares like GRASS and R. In this case the related QGis plugins can
be used.
If you can give us more details on the kind of interpolation you nedd,
we could give more advices.
Giovanni
[1]
http://www.gistutor.com/quantum-gis/20-intermediate-quantum-gis-tutorials/51-inverse-distance-weighting-idw-interpolation-using-qgis.html
2011/5/25 Christine Schmidt <c.schm...@geotguide.de>:
Hi Bob,
thanks for the feed back.
Do you capture groundwater level data in boreholes and in monitoring
wells
with this plugin to store it in a database? Sounds interesting although I
wasn't searching exactly for that.
Want to process data of existing groundwater databases with QGIS.
Processing
means precisely the interpolation of groundwater level data and
laboratory
analysis data for groundwater monitoring wells.
I am checking what is already present in this field and what could
perhaps
be contributed for an efficient workflow.
Regards,
Christine
________________________________
Von: "Bob and Deb" <bobd...@gmail.com>
Gesendet: 25.05.2011 18:31:57
An: "Christine Schmidt" <c.schm...@geotguide.de>
Betreff: Re: [Qgis-user] Processsing of Groundwater Databases with QGIS
Hi Christine,
I've been working on a borehole data entry plugin. We are using it to
record historical high groundwater for use in liquefaction zone mapping.
Are you looking for this kind of use cases?
Regards,
Bob
On May 25, 2011 9:03 AM, "Christine Schmidt" <c.schm...@geotguide.de>
wrote:
Dear QGIS community,
would like to post my first question in this mailing list as follows:
a.. Does anybody know something about a project or use case of
processing
groundwater databases with QGIS, exspecially in order to make
interpolations
of point data (well data) ?
Got to know something similar in the context of GRASS
(Carrera-Hernandez,
2007). But what about QGIS in this application field ?
Thanks a lot for any feedback,
warm regards,
Christine
_______________________________________________
Qgis-user mailing list
Qgis-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/qgis-user
___________________________________________________________
Schon gehört? WEB.DE hat einen genialen Phishing-Filter in die
Toolbar eingebaut! http://produkte.web.de/go/toolbar
_______________________________________________
Qgis-user mailing list
Qgis-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/qgis-user
