Topic:
How to exclude null values in gridding operation of borehole data

Description:
        

Solution:
Currently BasemapPlus does not recognize a null value. 
In a later release of GeoFrame,BasemapPlus will have the ability to edit
contours and input data points.

WORKAROUND: There are two workarounds.  You will have to decide which to use
            based on the complexity of your data.
  
            1)  The first workaround is to use a graphical method to exclude all
                wells with zero data values posted.  You need to create
                boundaries of your modeling input data. You can get to this 
                feature by selecting:
                Define-->Boundaries-->Modeling Input Data Boundary
                You will have to draw a polygon around the wells that you want
                included in the gridding operation and exclude the ones with
                zero values.  This method will allow you to keep all well
                locations on the basemap.

            2)  In the second workaround, you will need to redefine your
                borehole sets to only include wells with non-zero data.  This
                will leave out some well positions that you may want but again
                will accomplish what you want.  You can save these borehole sets
                to reuse when you want to regrid the same data.




Last Modified on: 23-OCT-98