Hi Nicholas,

 

Sorry to trouble you with this question, that probably is basic. I am trying to use the Cayula-Cornillon edge detector on a MODIS SST raster (created with HDF converter in MGET) and keep getting a memory error.

 

I have MGET 0.7a15 installed in ARCgis 9.3 (with Spatial Analyst enabled), R 2.8.0, Pythonwin 2.5.1, Windows XP SP3. I’ve changed the ArcMap cache size to 1000 MB. The machine is a Toshiba Tecra, Intel CoreDuo, 2.53 Mhz, 2.99 GB ram.        

 

I am using a rectangle with 20º by 20º over the N Atlantic, from an 8day composite MODIS SST raster, created with the HDF converter in MGET; I’ve tried to run the Cayula-Cornillon detector both with the original integers (range 7-25779) and by applying an algebra _expression_ [int((inputRaster) * 0.000717 – 2)] to get the temperature range. The remaining parameters are the default and can be seen in the image.

 

Every time I run the tool, I get the following message:

 

Start Time: Tue Sep 29 16:00:36 2009

Running script CayulaCornillonEdgeDetectionDetectEdgesInArcGISRaster...

Finding fronts in C:\DATA\Environment\SST\SST\NA SST Aquamodis 8 day files\2008\extract_1372 using parameters: medianFilter=3, histogramWindow=32, histogramStride=16, minPropCellsWithData=0.65000000000000002, minPopProp=0.25, minPopMeanDiff=3.0, minTheta=0.76000000000000001, minSinglePopCohesion=0.90000000000000002, minGlobalPopCohesion=0.92000000000000004, threads=1.

Output rasters: fronts=C:\DATA\Environment\SST\SST\NA SST Aquamodis 8 day files\2008\test, filteredImage=None, candidateCounts=None, frontCounts=None, windowStatusCodes=None, windowStatusValues=None

MemoryError:

<type 'exceptions.MemoryError'>:

Failed to execute (CayulaCornillonEdgeDetectionDetectEdgesInArcGISRaster).

End Time: Tue Sep 29 16:00:39 2009 (Elapsed Time: 3.00 seconds)

 

I am a bit skeptical that I am running low on memory to run the tool. After trying to find a similar problem in the questions archive in the mget-help, I see no other solution than to bother you. Is this problem known to you?

 

Thanks for any help you can give,

 

Rui Prieto