Grade Estimation Examples
This topic is part of the Grade Estimation range of topics.
Example 1 – Nearest Neighbor and Inverse Power Distance
The first example is a run of ESTIMA using the Nearest Neighbor and Inverse Power Distance methods.
The Search Volume Parameter file, SRCPARM1, is shown below. Remember that all 24 fields are compulsory. Three separate search volumes have been defined. The first two will be used for this example, and the third for example 2.
The first search ellipsoid has an axis of 100m dipping at 45 degrees in the direction N25(degrees)E. The second axis is 40m and is aligned horizontally in the direction E25(degrees)S. The third axis of the search ellipsoid is 10m, perpendicular to the other two. The second search ellipsoid has the same rotations as the first ellipsoid, and then a third clockwise rotation of 65 degrees is applied in the new XY plane.
|
|
SREFNUM |
SMETHOD |
SDIST |
Y |
Z |
ACT DIST |
TRAN DIST |
FIELD |
|
1 |
1 |
2 |
40 |
100 |
10 |
25 |
45 |
0 |
|
2 |
2 |
2 |
40 |
100 |
10 |
25 |
45 |
65 |
|
3 |
3 |
2 |
70 |
60 |
80 |
12 |
34 |
56 |
|
|
SAXIS1 |
SAXIS2 |
SAXIS3 |
MINNUM1 |
MAXNUM1 |
SVOLFAC2 |
MINNUM2 |
MAXNUM2 |
|
1 |
3 |
1 |
3 |
1 |
10 |
- |
- |
- |
|
2 |
3 |
1 |
3 |
1 |
500 |
- |
- |
- |
|
3 |
3 |
1 |
3 |
1 |
11 |
- |
- |
- |
|
|
SVOLFAC3 |
MINNUM3 |
MAXNUM3 |
OCTMETH |
MINOCT |
MINPEROC |
MAXPEROC |
MAXKEY |
|
1 |
- |
- |
- |
0 |
- |
- |
- |
- |
|
2 |
- |
- |
- |
0 |
- |
- |
- |
- |
|
3 |
- |
- |
- |
0 |
- |
- |
- |
- |
All fields in the Estimation Parameter file, except VALUE_IN, are optional. In this example 7 fields are specified for file ESTPARM1, and so the remaining fields all take their default values.
In particular this means that ANISO=1, so the anisotropy ellipsoid for distance weighting is the same as the search ellipsoid.
|
|
VALUE_IN |
VALUE-OU |
NUMSAF_F |
SREFNUM |
IMETHOD |
POWER |
ADDCON |
|
1 |
AU |
AU-NN |
- |
1 |
1 |
- |
- |
|
2 |
AU |
AU-IPD |
IPD-NUM |
2 |
2 |
1 |
5 |
The required files for ESTIMA are shown below. No fields or parameters have been specified as they all take their defaults.
!ESTIMA &PROTO(PROTOMOD), &IN(SAMPLES), &MODEL(MOD1EST),
&SRCPARM(SRCPARM1), &ESTPARM(ESTPARM1)
Example 2 – Ordinary Kriging
The Search Volume Parameter file used here is the same file as used for example 1. The Estimation Parameter file, ESTPARM2, contains the following fields:
|
|
VALUE_IN |
VALUE-OU |
NUMSAF_F |
VAR_F |
SREFNUM |
IMETHOD |
VREFNUM |
LOG |
|
1 |
AU |
AU-KRG |
N-KRG |
KV-KRG |
3 |
3 |
5 |
0 |
|
2 |
AU |
AU-LOG |
N-LOG |
KV-LOG |
1 |
3 |
6 |
1 |
The Variogram Model Parameter file, VMODPARM is:
| VREFNUM | VANGLE1 | VANGLE2 | VANGLE3 | VAXIS1 | VAXIS2 | VAXIS3 | NUGGET |
1 | 5 | 12 | 34 | 56 | 3 | 1 | 3 | 10 |
2 | 6 | 25 | 45 | 0 | 3 | 1 | 3 | 0.1 |
| ST1 | ST1PAR | ST1PAR2 | ST1PAR3 | ST1PAR4 |
1 | 1 | 40 | 30 | 50 | 20 |
2 | 1 | 45 | 35 | 55 | 0.2 |
The required fields and parameters for ESTIMA are shown below. All fields and all other parameters take their defaults.
!ESTIMA &PROTO(PROTOMOD), &IN(SAMPLES), &MODEL(MOD2EST),
&SRCPARM(SRCPARM1), &ESTPARM(ESTPARM2),
@XPOINTS=3, @YPOINTS=3, @ZPOINTS=3
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