MapInfo Pro

Hello, in the raster calculator, is there a way to write an expression that looks at values in all adjoining cells and only keeps the cell if one of the adjoining cells returned a value. Or in other words, if all adjoining cells had a null value, then that cell assessed would not be kept in the output raster.

Thank you for any assistance.

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Lisa Karklis
Knowledge Community Shared Account
Burlington MA
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Hi Lisa

Did you check the Filter options?

The Majority Focal Filter almost does what you are after.

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Peter Horsbøll Møller
Principal Presales Consultant | Distinguished Engineer
Precisely | Trust in Data
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The Raster Calculator only operates on a single cell at a time and is not able to be used to perform this operation.

The Focal Filters operate on a window that you can customise, but are not flexible enough to be used for this purpose.

I have implemented a "Declutter" processing operation in ProRaster Scientific which Lisa was able to use to perform this operation.

The Declutter operation uses a user-defined window of NxN cells and, at each valid cell, will invalidate the cell if it cannot find a user-defined minimum number of valid cells in the window centred on the cell. It can perform multiple passes, as invalidating cells may lead to others being invalidated in a subsequent pass.

You can buy ProRaster Scientific on the Microsoft Store.

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Sam Roberts
Founder, Roberts Geospatial Engineering
Australia
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