• Re: Polygon file


    Hey Faby,

    what are you trying to do? It sounds like using a shape file would be a lot easier than a polygon file. Do you use a GIS that can export data to shape files? Shape files store both the geometric information (shape of the polygon) and the assigned attributes (in a linked dbf file).

    If you are trying to join or assign data to conductivities, shape files will likely make your life a lot easier.

    Oh ... I just re-read your original posting. PEST ... mh .. I would have to check if PEST can use shape files at all.

    Chris
  • Re: coordinate

    No reason except that I typed before I thought.  If the goal is to just get node coordinates, either will work. Exporting nodal data at nodes has the added benefit of obtaining node data as well as node coordinates. When exporting material properties, I export as elements and also save the element coordinate information.
  • Re: coordinate


    Hey Dwaine,

    quick question: Why do you suggest exporting elemental data at nodes, rather than exporting nodal data such has elevations or heads? Any particular reasoning for that?

    MapWindows looks interesting. I just had a look at Leszek Pawlowicz's introductory videos at
    [url=http://freegeographytools.com/2007/introduction-to-mapwindow-gis-i-shapefile-viewing]http://freegeographytools.com/2007/introduction-to-mapwindow-gis-i-shapefile-viewing[/url]
    Pretty cool!

    Cheers, Chris
  • Re: coordinate

    There is a mesh inspector within the mesh geometry editor, but it does not give coodinates  :(  (a new feature to consider?)

    If accuracy is not an issue, I usually just zoom way in onto a node and read the coordinates while using the magnifier tool. Otherwise, I usually export the node information by using Flow Materials ... Special ... Save Nodeal Materials as Points. This gets me a list of nude numbers and their coordinates which I can then import into Excel.

    For GIS software, we use MapWindow (www.MapWindow.org). It's free.

    Dwaine
  • Re: flux calculation


    Good luck with getting [i][b]exact [/b] [/i] flux values out of a FE model .... I'd say that's close to impossible. Try to use the estimates that the Fluid Flux Analyzer gives you. That's likely as good as it gets - unfortunately  :(

    Cheers, Chris
  • Re: coordinate

    The easiest is to export the elevations of slice one (or any nodal data for what it matters) as a shape file and import it to your GIS software. That will give you the exact coordinates (make sure you work in global coordinates!!). I don't think the GUI provides a coordinate inspector :-(

    As for excellent and inexpensive GIS software I recommend to take a look at Manifold. It starts at just $245!!! You can find more information at [url=http://www.manifold.net/info/products.shtml]http://www.manifold.net/info/products.shtml[/url]

    Cheers, Chris



  • Re: calibration of model

    Hey Chrisoula,

    as Eladd already pointed out, in version 5.2 it's a little more complicated.

    The traditional way is to define observation points for your model slices (see "Info - Help - Glossary - R - Reference Distributions - Reference Data - Observation single points" for details). FeFlow will write the simulated heads for those observation points to the DAR file. The DAR file is a simple text file and you can find those exported heads at the end of the file. Copy-and-Pasting them to Excel is one option to compare them to your observed values.

    All this can be automated using IFM modules, but that requires programming skills. All you need then is an input file with your observation point locations. The IFM module would read that file and write the data plus simulated heads to an output file.

    At the FeFlow User Conference in Berlin last year, I gave a presentation about this and attach the paper that came with it for your information.

    Good luck, Chris
  • 'WEIGHT' at PEST

    i wonder what the 'weight' means at
    PEST --> observations  --> observations editor.
    does it some kind of uncertainty?
    i.e. i need to enter weight=1 if i'm 100% sure and weight=.95 if i'm only 95% sure?
    for example if i assume head is 25-+1 that means 100%-(1/25)=96% certainty???

    i appriciate any answer!
    good day,
    Elad
  • Re: calibration of model

    This option is only at ver 5.3.
    on previous version this is more complicated and involved export to excell

    Elad
  • Re: calibration of model


    Hey Chrisoula,

    there is a demo video available on WASY's web page:

    How to use scatter plots for steady-state calibration?
    [url=http://www.wasy.de/english/produkte/feflow/howto/video_calib.htm]http://www.wasy.de/english/produkte/feflow/howto/video_calib.htm[/url]

    Check it out  ;)

    Also, read "Observation single points" under "Info - Help - Glossary - R - Reference Distributions - Reference Data - Observation single points". It explains how to specify observation points in your model, and references the DAR file format where the output is stored.

    Good luck, Chris