Get Overlaps

Get Overlaps finds the overlaps between grids and stores them in a binary file – the Overlap Points File. This file can not be edited by the user.

The aliases and parameters that must be set for this process (via the Set Aliases and Parameters menu) are shown in the table below.

Control File Keyword	Type	Description
inputGridDirectoryGetOlap	string	The input grid directory. This is a sub-directory of the Working Directory.
controlLinesDatabasePath	string	The path (relative to the Working Directory) of the Intrepid database.
controlLinesFieldName	string	The control lines field (channel) that constitutes the baseline.
controlLinesXCoordinate	string	The control lines x-coordinate field.
controlLinesYCoordinate	string	The control lines y-coordinate field.
controlLinesAltitude	string	The control lines altitude field.
useControlLines	integer	0 – not using control lines, 1 – using control lines.
overlapPointsFileOlap	string	The overlap points file (will be created in the Working Directory).
maxOverlapPoints	integer	Maximum number of overlaps per grid pair. Overlap points are sub-sampled to a maximum of maxOverlapPoints per grid pair.
maxAltitude	integer	Maximum altitude (for control lines). Control line points with altitude greater than this are not used.
dataClipSdev	float	Only overlap points with differences less than dataClipSdev from the mean are used.

Get Overlaps will take advantage of any Grid Memory Cache. You can specify the maximum amount of memory for the cache via the Set Aliases and Parameters menu, or you can specify it using the control file using the memoryCacheSize keyword (integer). This sets the memory cache size in MB.