Block definitions
Overview
Depending on your choice of estimation methods, you need to define a grid of points or blocks. An estimated value will then be calculated for each point or block in the grid.
In BLOCK mode you need to specify the coordinates of the centre of the first block, the block dimensions and the number of blocks. Similarly, in POINT mode you specify the first point in the grid of points, the grid spacing and the number of points. In either case you can optionally enter coordinates of the last block or grid and the program will calculate the number of blocks or grid cells.
In POLYGON mode you only need to specify East and North fields as inputs to the process. The Block Definitions button is disabled.
Origin Block Centre
Enter the Easting, Northing (and Z) coordinates of the first point in the grid of points, or coordinates of the centre of the first block in a 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 (Z) 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
This is the Easting, Northing and Z coordinate of the last point in a grid of points or of the centre of the last block in a grid of blocks. It will be calculated automatically based on your previous entries. If however, you want to specify the End point and Origin then the number of Blocks/Points will be calculated automatically.