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The Resample Grids function can be used to resample one or more grid files to match a specific source grid or to a new grid size. Re-sampling may be necessary if grid-to-grid operations are to be performed.
Two methods are available for resampling grids:
(1) Grid To Match All Re-Sampled Grids (Source) -
The grid node locations of this grid will become the nodes of the resampled grids. All resampled grids will match the number of rows and columns and grid dimensions of this grid. Use the "Grid Info..." button to display grid header information of the source grid.
(2) Resample to New Grid -
The number of rows and columns of the resampled grids will be computed from the X and Y grid sizes. The new grid limits will not change.
Grids To Resample
Choose one or more grids which will be resampled to match the source grid. Do not include the source grid in the selection list. Change the "Sort Grids By" option to resort the grid list by date or name.
Method
·Neighbor Search - This method averages several grid node values around the xy point to be sampled. This is usually the most accurate method.
·Direct Interpolation - The method averages the 4 grid nodes of the grid cell containing the xy point.
·Direct Interpolation (faster) - Similar the previous method.
Note: resampled grids are modified in place. If you wish to retain a copy or the original grid, make a backup copy using Windows Explorer. The grids are stored in the "GRIDS" directory under the project primary directory.
Click the OK button to begin the resampling process.
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