please give me tools in arcgis to found spatial correaltion (ndvi & rainfall etc ) raster file
Hi Leelambar,
You can use "Band Collection Statistics" in the Spatial Analyst Tools. It will give you the covariance and correlation matrices.
Cheers Jetse
As Jetse Stoorvogel points, the "Band Collection Statistics" in the "Spatial Analyst Tools" computes summary statistics, matrix of covariance and correlation, the documantatios is available in:
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009z000000p5000000.htm
The former are not autocorrelation indices, it's just the bivariate Pearson index, if you need to compute spatial autocorrelation indices (global Moran's I or th Getis Ord Gi*) you will need to transform your raster data to points (to geodatabase, because it will be massive!) and use the modelling spatial relationships and analyzing patterns tools within the "Spatial Statistics Tools"
As Dr. Caudillo said, if the images are not too big, you can transform the raster data to points as txt file, and them using a statistical software you can obtain what do you need.
Thank You. Jetse , Caudillo and Orlando for your answer..
again Thanks
Hey! You can always to calculate RMSE between two rasters. It is simple:
1) Subtract one raster to another, the direction of subtraction does not matter (ArcToolbox - 3D Analyst - Raster Math - Minus)
2) Raise the result to a square (ArcToolbox - Spatial Analyst Tools - Math - Square)
3) Read the raster mean value
4) Calculate the root of the raster mean value
This number is a measure of the typical cell-by-cell difference between the two rasters.
I think you want the Band Collection Statistics tool in Spatial Analyst. It takes rasters as input and can output the correlation matrix (among other statistics). Just make sure to check the "Compute covariance and correlation matrices" box.
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009z000000p5000000.htm
Be careful with the path :
https://community.esri.com/thread/198028-correlation-between-two-raster-using-band-collection-statistics
"even with the paths scratched out, they appear very long, on some sort of network drive... can you not work on your local machine with a simple folder structure (c:\test for example) to try to rule out their location and path issues "
You can add the SDMTools box to ArcGIS and use the tool to calculate correlation and covariance coefficients among input rasters.
http://sdmtoolbox.org/technical-info#Uni4b
Dear you can convert your data to vector data then do linear regression
You can use ENVI software then you get better result
ENVI is a best image processing software
You could also make a systematic point dataset, and extract the values from each raster into separate columns. Then you could calculate the correlation coefficient between the separate rasters in Excel.
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