I wants to correlate two different types of satellite data, like NDVI anomaly or VCI map with that Precipitation Anomaly map. Is there any procedure to correlate both the images with correlation value in software like QGIS or Erdas or ArcGIS?
I would use R-Bridge for ArcMap. Since R is a powerful engine for statistical analysis, modelling etc. Another way is manual, just export the raster/vector values into ascii and stuff into the R dataframe, then go with analysis.
Do you want to correlate pixel to pixel everyday? It is better if you could extract time series for selected pixel or location for both satellite products and do the correlation analysis. Some discussions are here:
http://gis.stackexchange.com/questions/91988/how-to-do-spatial-correlation-between-two-variables-on-arcgis-10-1
yes in erdas you can do.
https://hexagongeospatial.fluidtopics.net/book#!book;uri=1140788500037b452437cf64d089abac;breadcrumb=c35196571c8c9f7f98f1cfea223060c0-b80d8979b1dcfec76345b2fc8c2e8565-01edff8f3e52146d0980cfeb87113d71
you can also use matrix in erdas to evaluate two thematic layers.
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