minesight 3d: subcell count

8/12/2019 MineSight 3D: Subcell Count

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Fig. 2Sengs and illustraon for gridding

a GSF with a 10 x 10 subcell count (100

vectors per grid).

If the subcell count is changed to 10 x 10, then each grid cell eleva

will equal the average elevaon value of 100 evenly spaced ve

(Figure 2).

Obviously a GSF cell value calculated from a subcell count of 10

(100 vectors) will be a much more accurate representaon o

enre cell than a subcell count of 1 x 1 (1 vector). However, asnumber of vectors used to calculate a cell value increases, so

the processing me. For grid cells created with a subcell count

25 x 25 (625 vectors), processing me may be greatly increased

lile increase in the accuracy of the cell value.

What is the best subcell count to use? The answer to these ques

depends upon what you are trying to accomplish.

Fig. 2

1 x 1 subcelling should be used for viewing, contouring, and with any interaction with other1 x 1 gridding, for example in MSBasis procedures pdhgrd.dat and grdrat.dat. A higher subcell

count should be used for MSEP and topo% coding if youre not using a solid.

)HINT


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Fig. 3Illustraon of

topographic surface viewed

asFilled polygons.

Fig. 4Illustraon of

topographic surface viewedasSurface/Slab.

Fig. 3

V I E W I N G T O P O G R A P H I C S U R F A C E S

For basic viewing of topographic surfaces, a 1 x 1 subcell c

provides a good representaon of your topographic data

relavely short amount of me. Addionally, when the dis

style is changed from Filled polygonsto Smooth contours

result is a connuous surface as shown in Figure 3 and FiguBoth are created with a 1 x 1 subcell count and can be used

dramac visualizaon purposes.

Fig. 4


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S U R F A C E S F O R A N A L Y S I S O R P I T D E S I G N

If you are using the GSF for analysis or designing a pit using MSOPIT, you may consider using a higher subcell

count in order to increase the accuracy of the overall grid value. Although your values may not change

signicantly at each cell, the cumulave result of your enre study area may be very large.

Fig. 5Grid elements located

in the middle of the 20 x 20

meter cell using one vector

(subcell count of 1 x 1).

The yellow star representsthe center of the cell.

Fig. 5


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Figures 5 (previous page) and 6 illustrate the dier

between using 1 x 1 vs 10 x 10 subcell counts. The

lines represent the outline of each GSF grid cell draped

triangulated (brown) surface. The yellow stars represen

point where one central vector would intersect the ce

Figure 5, the GSF cell value is idencal to the elevaon otriangulated surface elevaon at the cell center. Alterna

in Figure 6, the average cell value is not necessarily

value at the center (the posion of the yellow star). Inst

increasing the subcell count results in the GSF cell eleva

represenng the average of 100 vectors within the cell.

interpretaons are valid depending upon what you wa

do with the surface.

C O N C L U S I O N

In general, for most visualizaon purposes we suggest u

a subcell count of 1 x 1. This will result in a good ov

illustraon of the surface elevaon. However, where mdetailed analyses are necessary, we suggest using betw

10 x 10 (100 vectors per grid cell) with an upper lim

25 x 25 (625 vectors per grid cell).

Fig. 6

SOFTWARE SOLUTIONS FROM MINTEC, INC.

Fig. 6Grid elements placed in the average

locaon of the 20 x 20 meter cell based on 100

vectors (subcell count of 10 x 10). The yellow

star represents the center point of the cell.

minesight 3d: subcell count

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