Tom Maddock wrote:
Hello,
We are newcomers to QGIS and are trying to evaluate its suitability for
application to some ecological programs we have developed. I am not
sure we are in the proper forum for our questions, which are many, but
here is a start.
We have developed an ArcGIS 9.2 custom application in VB 2005, .NET
framework 2.0 to derive parameters for the riparian evapotranspiration
package in MODFLOW and visualize MODFLOW groundwater results. We are
considering using QGIS to perform the geo-processing component of our
program instead of using the ESRI product. It should be noted that
MODFLOW is a FORTRAN-90 product (yes, some people still use FORTRAN),
and is used to solve the groundwater flow equations.
We would like to know if QGIS provides some of the out of the box
geo-processing components such as overlay analysis and zonal statistics
similar to ArcGIS.
Here is the list of geo-processing tasks that we perform in our program:
* Attributing vegetation polygon shapefile interactively by
selecting polygons and enter % cover values on a form
./acda/Acda en de Munnik - Trilogie Deel I Zwerf'on/Mp3/Acda en de Munnik - 10
- Dag Esmee.mp3
* Creating finite difference grid as a polygon shapefile in order to
support irregular grid sizes
* Intersecting vegetation polygon shapefile with the finite
difference grid shapefile and updating areas of the polygons
* Obtaining average surface elevation per riparian polygon derived
from (DEM) and write it to vegetation polygon shapefile
* Access each record in the attribute table and write values in a
text file with specific format.
Couple of questions:
* Is there a support for relational database management such as join
and relates?
* What are the supporting programming languages and can we re-use
some of the components that are already written in VB .NET in the
project?
Thomas Maddock III
Professor and Head
Department of Hydrology & Water Resources
University of Arizona
1133 E. James E. Rogers Way, Rm. 122
Tucson, Arizona 85721
(520)621-7120
Hi Tom,
I think you should try to ask this in the qgis-users list. I will
forward this message to it ..
Short answers of some things I know:
- postgresql/postgis is a relational database which can be used with
qgis which I think can do what you want.
- though qgis is written in c++/qt, there is a very nice python-plugin
interface which can be used to write extensions
- most dataformats are both readable and writable
- qgis can be used as frontend of GRASS a (from what I've heard) a
pretty powerfull opensource gis
Hope this helps a little, and maybe other people on the users list can
help you any further.
Regards,
Richard Duivenvoorde
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