Input sample data to be cross validated. This must contain X,Y and Z fields and at least one grade field.

Input

Yes

Undefined

Search volume parameter file. This contains 24 compulsory fields defining the search volume and the number of samples needed for grade estimation. More than one search volume may be defined.

All fields are numeric:

• SREFNUM Search volume reference number.
• SMETHOD Search volume shape.
• 1 = 3D rectangle
• 2 = ellipsoid.
• SDIST1 Max search distance in direction 1.
• SDIST2 Max search distance in direction 2.
• SDIST3 Max search distance in direction 3.
• SANGLE1 First rotation angle for search vol.
• SANGLE2 Second rotation angle.
• SANGLE3 Third rotation angle.
• SAXIS1 Axis for 1st rotation (1=X,2=Y,3=Z).
• SAXIS2 Axis for 2nd rotation (1=X,2=Y,3=Z).
• SAXIS3 Axis for 3rd rotation (1=X,2=Y,3=Z).
• MINNUM1 Min number of samples, 1st search vol.
• MAXNUM1 Max number of samples, 1st search vol.
• SVOLFAC2 Axis multiplying factor,2nd search vol.
• MINNUM2 Min number of samples, 2nd search vol.
• MAXNUM2 Max number of samples, 2nd search vol.
• SVOLFAC3 Axis multiplying factor,3rd search vol.
• MINNUM3 Min number of samples, 3rd search vol.
• MAXNUM3 Max number of samples, 3rd search vol.
• OCTMETH Octant method flag.
• 0 = no octant search,
• 1 = use octants.
• MINOCT Minimum number of octants to be filled.
• MINPEROC Minimum number of samples in an octant.
• MAXPEROC Maximum number of samples in an octant.
• MAXKEY Maximum number of samples with the same key value within an octant.

Input

Yes

Undefined

Estimation parameter file. Each record in the file describes an estimation method and its associated parameters. The fields are dependent on the estimation methods selected.

General fields:

• VALUE_IN: Field to be estimated.
• SREFNUM: Search volume reference number.
• VALUE_OU: Field to be created in MODEL (Default is VALUE_IN).
• {ZONE1_F}: 1st field for zonal estimation. The actual name of the field is given by ZONE1_F on command line e.g. ZONE1_F(ROCK).
• {ZONE2_F}: 2nd field for zonal estimation.
• NUMSAM_F: Field to be created in MODEL for the number of samples.
• SVOL_F: Field to be created in MODEL for dynamic search volume number.
• VAR_F: Field to be created in MODEL for variance of estimate.
• MINDIS_F: Field to be created in MODEL for distance to nearest sample. IMETHOD N Estimation method.
• 1 = Nearest neighbour (NN).
• 2 = Inverse power of dist (IPD).
• 3 = Ordinary kriging (OK).
• 4 = Simple kriging (SK).
• 5 = Sichel's t estimator. Anisotropy fields for NN and IPD:
• ANISO: Anisotropy method:
• 0 = no anisotropy.
• 1 = use search vol anisotropy.
• 2 = use ANANGLEn.
• ANANGLE1: Anisotropy angle 1.
• ANANGLE2: Anisotropy angle 2.
• ANANGLE3: Anisotropy angle 3.
• ANDIST1: Anisotropy distance 1.
• ANDIST2: Anisotropy distance 2.
• ANDIST3: Anisotropy distance 3.

Fields for IPD:

• POWER Power of distance for weighting.
• ADDCON Constant added to distance. Fields for kriging:
• VREFNUM: Variogram model reference number.
• LOG: Lognormal variogram flag.
• 0 = normal kriging.
• 1 = lognormal kriging.
• KRIGNEGW: Treatment of -ve weights:
• 0 = -ve weights kept and used.
• 1 = ignore samples with -ve weights
• KRIGVARS Treatment of variance > sill:
• 0 = write variance to MODEL.
• 1 = set variance to sill. Fields for lognormal kriging:
• GENCASE Calculation method:
• 0 = Rendu's method.
• 1 = General case.
• DEPMEAN Deposit mean [If 0 then use kriged estimate].

Fields for general case:

• TOL N Tolerance for convergence.
• MAXITER N Maximum number of iterations.

Fields for simple kriging:

• LOCALMNP: Method for calculation of local mean:
• 1 = use field defined in PROTO
• 2 = use mean within search vol.
• LOCALM_F: Name of local mean field in PROTO; used if LOCALMNP=1

Input

Yes

Undefined

Variogram model parameter file. Each record in this file defines a variogram model type and its parameters. Only the VREFNUM field is compulsory.

• VREFNUM Model variogram reference number.
• VANGLE1 Variogram anisotropy angle 1.
• VANGLE2 Variogram anisotropy angle 2.
• VANGLE3 Variogram anisotropy angle 3.
• VAXIS1 Model variogram rotation axis 1.
• VAXIS2 Model variogram rotation axis 2.
• VAXIS3 Model variogram rotation axis 3.
• NUGGET Nugget variance.
• ST1 Variogram model type for structure 1.
• 1 = Spherical.
• 2 = Power [eg 1 - linear].
• 3 = Exponential.
• 4 = Gaussian.
• 5 = De Wijsian.
• ST1PAR1 1st parameter of structure 1 [Range 1 for spherical model].
• ST1PAR2 2nd parameter of structure 1 [Range 2 for spherical model].
• ST1PAR3 3rd parameter of structure 1 [Range 3 for spherical model].
• ST1PAR4 4th parameter of structure 1 [C variance for spherical model].
• STn Variogram model type for structure n.
• STnPARp pth parameter for structure n, where n<=9.

Input

No

Variogram - Model

Experimental variogram file, as created by the variogram calculation process VGRAM.

This experimental variogram file will have been used by the variogram fitting process VARFIT in order to derive the variogram model defined by VMODPARM .

This is only required if you want to use access the variogram display and fitting process VARFIT from within XVALID.

Input

No

Variogram - Experimental

Output

No

Undefined

Cross-validated output sample file. This contains all the fields from the IN sample data file, plus each grade estimate and associated secondary fields such as kriged variance.

Output

No

Undefined

Output file containing a summary of the input parameters and the cross-validation statistics.

It includes a single record for each estimate. The 23 fields in the file are summarised below.

If the file already contains all 23 fields then additional records are appended to the file. If the file does not contain all 23 fields, or if the file does not exist, then a new file is created.

• ID - each estimate is assigned a unique numeric identifier
• VALUE_IN - field in sample IN file being estimated
• VALUE_OU - field containing estimated value
• IMETHOD - estimation method (1=NN, 2=IPD, 3=OK, 4= SK, 5=ST)
• SREFNUM - search volume reference number
• VREFNUM - variogram reference number
• POWER - power of distance for IPD
• NUM_EST - number of samples for which estimates have been made
• NUM_MISS - number of samples whose values were not estimated
• ACT_MEAN - mean grade of the sample values (the actuals)
• EST_MEAN - mean grade of the estimated values DIFF - actual mean grade minus estimated mean grade
• PC_DIFF - DIFF as a percentage of the actual mean grade
• MAD - mean absolute difference between actual and estimated grades
• ACT_VAR - variance of the actual grades
• EST_VAR - variance of the estimated grades
• COR_COEF - correlation coefficient between actuals and estimates
• KV_VMOD - mean of the kriged variance of each estimate
• KV_DIFF2 - mean of (Actual - Estimate)**2
• KV_RATIO - ratio of KV_VMOD to KV_DIFF2
• REG_CON - constant of regression line of actual on estimate
• REG_SLP - slope of regression line of actual on estimate
• REG_SE - standard error of regression line of actual on estimate

Output

No

Undefined

Output sample file containing details of weights for each sample for each estimate.

X coordinate of sample data in IN file. If not specified, then X is assumed.

IN

Yes

Numeric

Undefined

Y coordinate of sample data in IN file. If not specified, then Y is assumed.

IN

Yes

Numeric

Undefined

Z coordinate of sample data in IN file. If not specified, then Z is assumed.

IN

Yes

Numeric

Undefined

First field for zonal control. The field must exist in the IN file and in the ESTPARM file.

IN, ESTPARM

No

Any

Undefined

Second field for zonal control. The field must exist in the IN file and in the ESTPARM file.

IN, ESTPARM

No

Any

Undefined

Key field used to specify the field limiting the number of samples for estimation. The field must exist in the IN file.

IN

No

Numeric

Undefined

Field used for length weighting in IPD. The field must exist in the IN file.

IN

No

Numeric

Undefined

Field used for density weighting in IPD. The field must exist in the IN file.

IN

No

Numeric

Undefined

Display control: