footprint
The footprint module is used to create the 2D footprint of a 3D input. It creates a surface at the specified Z Position with an x-y extent that matches the 3D input. The footprint output does not contain data, but data can be mapped onto it with external kriging.
NOTE: Do not use adaptive gridding when creating the 3D grid to be footprinted and mapping the maximum values with krig 2d (as in the example shown below). Footprint will produce the correct area, but krig 2d will map anomalous results when used with 3d estimation’s adaptive gridding.
Ports
| Direction | Name | Type | Description |
|---|---|---|---|
| Input | Input Field | Field | The field to use for creating the subset. |
| Output | Output Field | Field | The footprint field. |
| Output | Output Boundary | Field | The footprint boundary lines. |
| Output | Output Object | Renderable | A renderable object to display. |
Properties
| Property | Type | Description |
|---|---|---|
| Allow Run | Boolean | This toggle can prevent the module from running. Allowing the user to make changes to large data sets without waiting for updates. |
| Gridding Method | Choice: Outline Only, Regular Grid | Controls which method is used to fill the outline of the footprint with points. Outline Only does not output any surface on the footprint port. Regular Grid distributes points in a grid with a spacing defined by the Cell Size option. |
| Grid Cell Size | Double | If the Gridding Method is Regular Grid this defines the spacing of the grid to fill the interior of a footprint outline with points. |
| Z Position | Double | Z Position determines the Z location of the output. This allows you to position the output at the most convenient elevation. |
Refinement
| Property | Type | Description |
|---|---|---|
| Boundary Tolerance | Double | The Boundary Tolerance defines the minimum allowable distance - expressed as a percentage of the Grid Cell Size - that an internal grid point must maintain from the boundary to be included in the output. This constraint helps prevent the formation of long, narrow triangles by enforcing spacing between grid points and boundary edges. |
| Shape Tolerance | Double | The Shape Tolerance specifies the maximum distance a boundary polygon point may deviate from the imaginary line between its two neighbor points to be considered a distinct point. Points closer than this threshold are treated as collinear and removed to simplify the output. A larger value results in fewer output points and segments but a less accurate footprint. |