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comment How to create an error map to support an average kernel density map?
@whuber, could you elaborate on (a) in your first paragraph? For example, are you referring to errors in data collection techniques that may persist across each forest gap (and therefore systematically manifest themselves in each KDE raster), or errors tied to the implementation of the focal function?
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comment How to implement bivariate Ripley's K function in ArcGIS 10?
For your second inquiry, you might glean some inspiration from this answer. The shuffling of labels should be easy in Python. For spatial stats in Python you might want to look at PySAL.
Nov
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awarded Commentator
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comment How to determine if trees within forest gaps are clustered?
Aaron, you say that you tried running Moran's I, are you interested in measuring how a sapling's attribute compares with neighboring saplings' attributes (i.e. are you dealing with a marked point pattern)? The title seems to imply that you are only interested in the location of the saplings relative to one another and not their attributes.
Nov
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comment How to compare two spatial point patterns?
@dalek, one good reference for this technique is Bailey and Gatrell's Interactive Spatial Data Analysis.
Oct
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awarded Organizer
Oct
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revised Clustering with 3 attributes
Added spatial tag
Oct
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comment Clustering with 3 attributes
Are you looking to control for latitudinal effects by detrending for instance (i.e. estimating the latitudinal temperature trend, then removing it from the data before identifying clusters)?
Oct
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comment Generating spatially uncorrelated random fields in R
Martin, you might want to read the paper Error propagation of DEM-based surface derivatives (Computers & Geosciences, v31 n8) where the authors use autocorrelation models to represent the correlation structure of DEM errors.
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