Updating a Block Model Using External Data
Within the Maptek Evolution environment, the blocks in a block pit or waste utility can be updated or coded using two external data formats: DXF and CSV. You can also update a block model by applying a Maths Scripts. This section covers external data coding only.
DXF files of polygon information created in other general mine planning software can be used to update blocks within a block pit or a waste utility, whilst CSV files of matching block model data can be used to code block pits only.
Instances where coding of this type may be needed are re-coding of stages in block models or coding the different waste areas in a waste utility.
Several guidelines should be followed to ensure the external data used for coding the blocks is effective and efficient.
DXF Data (Block Pits and Waste Dumps)
Only polygon data can be used to code blocks in Maptek Evolution.
The polygon strings must be closed. Only the blocks within the polygon will be coded with the new value.
The elevation of the polygons must be within the block height of the blocks to be coded. It is best to create the polygons on the block model centroid elevations to ensure accurate coding. A polygon is required for each elevation requiring the new code, similar to contouring.
CSV Data (Block Models only)
The CSV data must contain identical centroid data as the block model to be coded. The coding uses the block centroid to cross reference the block model with the new data to be coded. The file can have the same, more or less number of blocks.
