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Resistivity/IP starting models |
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The background
resistivity and background IP
values are usually all that are required for an inversion. Occaisionally the
inversion needs a better place to start, and for forward modeling targets must
be placed. For these reasons the
resistivity anomaly and
IP anomaly frame is presented.
Anomalies are entered as rectilinear regions using the dimension
extents in the Insert Anomaly area. The extent of the
foreground region is presented for reference. A resistivity and IP
value is entered for each anomaly, however these anomalies are maintained
separately and do not have to match. Anomalies are deleted independantly from
the resistivity and IP areas by pushing the IP and resistivity buttons. To
delete an anomaly, select it using the mouse, then push delete anomly. Anomaly
shapes other than rectilinear must be built using a series of rectilinear
anomalies. To make this easier, each subsequent anomaly overwrites the previous
anomaly in areas of overlap. When adding anomalies to a topographicaly distorted grid it is
usually best to add the
anomalies to the flat grid first. This is done using the checkbox.
Otherwise jagged edges might appear as the software choses a higher elevation
element to fill with the anomaly. Anomalies must completely fill an element,
and elements are not distorted to the accomodate the anomalies, so the ultimate
anomaly present in the mesh may not be exactly the anomaly entered. Please view
the mesh prior to modeling to ensure the expected result. ![]() |
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|© 2006 Geostudi Astier srl and Multi-Phase Technologies LLC| |