Good stuff for spatial analysis in MapInfo Pro. You might also want to
consider SoilRx as well. Does nifty 3-D, variograms, surface generation, units
conversion, and more... There is a tutorial, system download, and demo data at
the site.
FYI
http://www.redhensystems.com/soilrx
MidNight Mapper
aka Neil
7/16/99
"W. Kent Treichel" wrote:
> I recently completed a Geo Statistics class, so I am certainly no expert,
> but the problem sounds familiar. We used a variety of software, most of it
> free. You can use Variowin to compute the variogram which provides
> distance and direction of correlation between values. Next you can put the
> data into GEO Eas, a free DOS app, that will figure the Kriging Standard
> Deviation for each grid. That data can then be put into Surfer, free
> downloads available, which can map the interpolated values, as well as the
> associated probability. It would be in your best interest to verify this
> methodology with a third party.
>
> S.J.Reid wrote:
>
> > I'm looking for any scripts/extensions/software/techniques
> > which can be used on/with Mapinfo/VM to aid in the creating of
> > statistically robust thresholds for density/interpolated grids.
> > What I'm researching more precisely is crime data, and how to apply
> > thresholds for the defining of a crime hotspot.
> > The original data is point data, which I create grids from, using
> > the different techniques available in Mapinfo/VM. The question comes
> > then to how applicable the different values are to setting a
> > statistically threshold, and how to do this.
> > Good rules of thumb would be welcome, but also autocorrelation
> > statistics, or LISA statistics, such as Gi and Gi*, or Morans's i.
> > Help would be most appreciated, as I am seeking to research how
> > well Mapinfo/VM and ArcView Spatial Analyst are suited to perform
> > this task, the results being advice to police cartographers on
> > possible steps to follow.
> >
> > Svein Reid, Msc GIS, University of Edinburgh.
> > ----------------------------------------------------------------------
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>
> --
> W. Kent Treichel
> Wilder Research Center
> 1295 Bandana Blvd N. Suite 210
> St. Paul, MN 55108
> (651) 647-4636
> ______________________________
>
> We sleep safely in our beds because
> rough men stand ready in the night
> to visit violence on those
> who would do us harm.
>
> George Orwell
>
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