Block Model - Usage Instructions

Block Model - Usage Instructions

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Strayos Block Model Usage Instructions

Block Model Format

The Block Model CSV is expected to be a plain CSV file without any metadata in the CSV. The text content should be tabular information of all the blocks. The very 1st row in the CSV is expected to be the Header row which the following mandatory columns

 

  1. Block Center X
  2. Block Center Y
  3. Block Center Z
  4. Block Size X
  5. Block size Y
  6. Block Size Z
  7. Block Unique ID

 

NOTE: It's not necessary for the column headers to follow the exact name mentioned above. You will be given an option to select the column headers in the UI

 

Valid Block Model conditions & checks

Block-Model boundary intersection

The boundary (bounding box) of block-model should intersect with the boundary of the terrain of the current dataset

This is calculated by using the Block Model CRS provided during upload, calculating the boundary of block-model using the CRS, intersecting

Block-Model Unique ID

The values of the “Block Unique ID” column should all be unique

Block Model Split Polygon

Split polygon inside Block-Model

The Block-model split polygon is expected to be drawn within the boundary of the full block-model. If the split-polygon is drawn outside of the full block-model, it will result in an incompatible split polygon

 

Too small Split Polygon

If the split polygon is too narrow, it may not always include the blocks from the block-model. This is because the algorithm checks if the block-center is inside the polygon. If not then the block is ignored for the polygon. So if the split-polygno is too narrow and the dimensions of the blocks in the block-model are too big, then its possible for the polygon not include any blocks

 

 

Too large Split polygon

●      The split polygon is currently limited to an area of 200,000 sq.m.

●      Additionally the app only supports loading 500,000 blocks at a single time. So if any of the polygons has a block count of more than 500,000, it is automatically ignored with a notification.

Multiple Block Model variations

A block-model is considered as an asset of the site (NOT dataset). So it is possible for you to upload multiple block-models with similar naming with mild modifications. Strayos allows this flexibility so that you can upload multiple block-models with new scans or updated information.

 But this also creates confusion while drawing split polygons, because the boundary of the block-model variations may not always be the same, and its currently not actively known.

For example, if you have a block-model with 1 mill rows and you create a copy of it with 100,000 blocks for testing and upload it. The upload will be successful, but the split polygon may not always have a block inside it.

 So it is essential to know the extents of the block-model while drawing the split polygon.

 

Example

The Green polygon is drawn for the 1st block-model, the red polygon is drawn for the 2nd block-model.

The 1st block-model is a smaller version of the 2nd. And the 1st block-model doesn't have any blocks in the area drawn, so the polygon is invalid and doesn't have any blocks, whereas the red polygon does.





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