Define the block size and quantity

To define the block size, quantity and the dimensions of the modelled area, click the Block Definitions button and do the following: 

  1. Define the block origin. This is the centre of the block at the lower left-hand corner of the modelling area.
  2. Enter the spacing between block centres in each dimension.
  3. Enter the number of blocks in the X and Y dimensions. 

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The area for which estimates are calculated is defined by the product of the number of blocks and the grid space or block size.

The block definition values are interactive. You can change the block spacing or number of blocks (# blocks), and then click in the Block End value response. The function will automatically calculate the new block end value.

To position a margin of blocks at a particular coordinate, displace the origin half the block dimension. For example, to have a five metre block extend from 1000 to 1005, the origin would be 1002.5.

Origin Block Centre 

Enter the Easting, Northing (and RL) coordinates of the first point in the grid of points, or the coordinates of the centre of the first block in the grid of blocks. These coordinates define the bottom lower left corner of the model (the lowest X and lowest Y values you choose to use).

Spacing

Enter the grid spacing or block dimension in the East, North and (RL) direction. There is no estimation accuracy advantage in creating a model with a large number of small blocks. Block size should reflect sample spacing and the geology of the deposit.

# Blocks

Enter the total number of points or blocks for which an estimate is to be calculated. The model dimension is the product of the grid spacing and the number of points or blocks.

End Block Centre

The Easting, Northing and RL coordinates of the last point in the grid of points, or the coordinates of the centre of the last block in a grid of blocks. It will be calculated automatically based on your previous entries. If you want to specify the End point and Origin, however, then the number of Blocks/Points will be calculated automatically.

Note: The maximum subcelling value is 25. Setting a high sub-celling value will increase the number of blocks and adversely affect the time taken to process them.