📄 gslib help ik3d.htm
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- saved from url=(0041)http://www.gslib.com/gslib_help/ik3d.html -->
<HTML><HEAD><TITLE>GSLIB Help: IK3D</TITLE>
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<META content="MSHTML 6.00.2900.2627" name=GENERATOR></HEAD>
<BODY bgColor=#ffffff><IMG height=8 alt=---
src="GSLIB Help IK3D.files/line.blue.gif" width=652>
<P>
<CENTER>
<H2>GSLIB Help Page: IK3D</H2></CENTER>
<DL>
<DT><IMG height=14 alt=o src="GSLIB Help IK3D.files/ball.red.gif" width=14>
<STRONG>Description:</STRONG>
<UL>
<LI>The program <TT>ik3d</TT> considers ordinary or simple indicator kriging
of either categorical and cdf-type indicators, it performs all order
relation corrections, and, optionally, allows the direct input of already
transformed indicator data, including possibly soft data and constraint
intervals. </LI></UL>
<DT><IMG height=14 alt=o src="GSLIB Help IK3D.files/ball.red.gif" width=14>
<STRONG>Parameters:</STRONG>
<UL>
<LI><B>vartype:</B> the variable type (1=continuous, 0=categorical)
<LI><B>ncat:</B> the number of thresholds or categories
<LI><B>cat:</B> the thresholds or categories (there should be <B>ncat</B>
values on this line of input)
<LI><B>pdf:</B> the global cdf or pdf values (there should be <B>ncat</B>
values on this line of input)
<LI><B>datafl:</B> the input continuous data in a simplified Geo-EAS
formatted file.
<LI><B>icolx, icoly, icolz,</B> and <B>icolvr:</B> the columns for the <I>x,
y,</I> and <I>z</I> coordinates, and the continuous variable to be
estimated.
<LI><B>directik:</B> already transformed indicator values are read from this
file. Missing values are identified as less than <B>tmin</B> which would
correspond to a constraint interval. Otherwise, the cdf data should steadily
increase from 0 to 1 and soft categorical probabilities must be between 0 to
1 and sum to 1.0.
<LI><B>icolx, icoly, icolz,</B> and <B>icoli:</B> the columns for the <I>x,
y,</I> and <I>z</I> coordinates, and the indicator variables.
<LI><B>tmin</B> and <B>tmax:</B> all values strictly less than <B>tmin</B>
and greater than or equal to <B>tmax</B> are ignored.
<LI><B>idbg:</B> an integer debugging level between 0 and 3. The higher the
debugging level the more output.
<LI><B>dbgfl:</B> the debugging output is written to this file.
<LI><B>outfl:</B> the output grid is written to this file. The output file
will contain the order relation corrected conditional distributions for all
nodes in the grid. The conditional probabilities or ccdf values will be
written to the same line or ``record''; there are <B>ncat</B> variables in
the output file. Unestimated nodes are identified by all ccdf values equal
to -9.9999.
<LI><B>nx, xmn, xsiz:</B> definition of the grid system (<I>x</I> axis).
<LI><B>ny, ymn, ysiz:</B> definition of the grid system (<I>y</I> axis).
<LI><B>nz, zmn, zsiz:</B> definition of the grid system (<I>z</I> axis).
<LI><B>ndmin</B> and <B>ndmax:</B> the minimum and maximum number of data
points to use for kriging a block.
<LI><B>radius_hmax</B> <B>radius_hmin</B> and <B>radius_vert</B> the search
radii in the maximum horizontal direction, minimum horizontal direction, and
vertical direction (see angles below).
<LI><B>sang1, sang2</B> and <B>sang3:</B> the angle parameters that describe
the orientation of the search ellipsoid. See the discussion on anisotropy
specification associated with Figure II.4.
<LI><B>noct:</B> the maximum number of samples per octant (octant search is
not used if <B>noct=0</B>
<LI><B>mik</B> and <B>mikcut:</B> If <B>mik=0</B>, then a full IK is
performed. If <B>mik=1</B>, then a median IK approximation is performed
where the kriging weights from the category or cutoff closest to
<B>mikcut</B> are used for all cutoffs.
<LI><B>ktype:</B> simple kriging is performed if <B>ktype=0</B> ordinary
kriging is performed if <B>ktype=1</B> </LI></UL>A variogram is is required
for each of the <B>ncat</B> thresholds/categories:
<UL>
<LI><B>nst,</B> and <B>c0:</B> the number of variogram structures and the
nugget constant, for the corresponding indicator variogram.
<LI>For each of the <B>nst</B> nested structures one must define <B>it</B>
the type of structure (the power model is not allowed); <B>cc</B> the
<I>c</I> parameter; <B>ang1,ang2,ang3</B> the angles defining the geometric
anisotropy; <B>aa_hmax</B> the maximum horizontal range; <B>aa_hmin</B> the
minimum horizontal range; and <B>aa_vert</B> the vertical range. A detailed
description of these parameters is given in section II.3. A short
description of the program </LI></UL></DT></DL><IMG height=8 alt=---
src="GSLIB Help IK3D.files/line.blue.gif" width=652>
<P></P></BODY></HTML>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -