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Question

Raster Aggregation

  • April 17, 2014
  • 4 replies
  • 139 views
E
Hi,

 

I have an ASCII grid with a cell size of 1km2, I was wondering if there was a way to aggregate these cells into 5km2 grid squares. I initially thought of using RasterResampler, but there is no option to sum the attributes.

 

For those familiar with ArcGIS i esentially want the equivilent of the tool 'Aggregate'

 

Thanks,

 

Ed
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4 replies

gio
Contributor
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  • gioContributor
  • Contributor
  • April 17, 2014
Hi,  I think u need to usea rastermosaicker first and then use a rasterresampler

 

 

 

Gio
E
  • edc
  • Author
  • April 17, 2014
Thanks Gio,

 

I'm sure that solves my problem however, as the interpolation type i require is a sum of the atributes, whereas the rastermosaicker and rasterresampler only have averaging, nearest neighbor etc.

 

Thanks,

 

Ed
gio
Contributor
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  • gioContributor
  • Contributor
  • April 17, 2014
Hi,

 

 

Then i assume u have overlapping gridcells.

 

you can use rasterexpressionevaluator for such.

 

 

There are good examples in the knowledge base here. Just search on the topic of rasters in there.

 

 

 

Gio
fmelizard
Safer
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  • fmelizardSafer
  • Safer
  • April 17, 2014
HI,

 

 

Typical case for some math on the cell values, I would think.

 

Essentially calculating the desired value and applaying the difference to each cell can  preserve the raster properties and  change the cell values to the desired value.

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