Included in the Oasis montaj Essentials Subscription, GridKnit provides two advanced methods for rapidly and accurately merging virtually any pair of geophysical grids. It includes a blending method for merging grids and a suturing method for defining a join path.


GridKnit enables geoscientists to rapidly and accurately merge virtually any pair of geophysical grids. GridKnit efficiently merges grids with different cell size, projection or grid type.

The blending method quickly merges grids via standard smoothing functions. The suturing method enables you to automatically or manually define a join path then applies a proprietary multi-frequency correction to eliminate differences between the grids along the path. "Postage stamp" stitching allows easy insertion of high-resolution grids into regional backgrounds.

A single wizard guides you through these steps:

  • Automatic or interactive stitch selection. Automatic option runs via intelligent defaults.
  • Blending or suturing method selection.
  • Pre-processing: 0, 1st, 2nd and 3rd order trend removal and trend area specification (overlap, all, edge points or overlap edge points).
  • Pre-processing: Regional trend removal.
  • Pre-processing: interpolation, maximum gap and output cell size specification.
  • Suture and weighting options (ensures a smooth transition between grids).
  • Stitch up to 10 grids together (or up to 20 using a script) in a single operation.

Use GridKnit to:

  • Stitch up to 10 grids together (or up to 20 using a script) in a single operation.
  • Remove static, slope, 2nd and 3rd order trends.
  • Calculate the trend using 'all points', 'overlapping points', 'edge points' and overlapping edge points.
  • Perform regional trend removal. With the "to a regional grid" method, trend removal operations are performed with respect to a regional grid. The maximum trend order may be specified, or adjusted automatically based on a fitting tolerance.


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