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When I open the attribute table for my GWR output, I'm seeing R2 values, coefficient values, etc. I wanted to examine the t-scores and corresponding p-values. Is there any way to obtain that info, or am I just not seeing it? Thanks!
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09-04-2013
06:26 PM
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Thanks everyone for the replies. Jeffery, should I use a weighting matrix based on contiguity if I go your route? (The continuous data itself is normally distributed.) Also, would GeoDa be a good program to use for the Moran's I permutation test? Thanks! Also, I'll be using GWR with my data, so should I create the spatial weights matrix in GeoDa and then import it into ArcMap?
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11-20-2012
09:03 AM
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Hey everyone! I???m a beginner/intermediate arc user, and I have a question about testing for spatial; auto-correlation with Moran???s I. I???m running some test data through ARCMAP to prepare for my dissertation analyses. Since I am analyzing all Ohio census tracts, I???m wondering about the best way to conceptualize spatial relationships. From what I???ve read, I???ve narrowed the best methods down to inverse distance weighting, distance band, and zone of indifference, but I???m still not sure which one to choose. (I didn???t choose the polygon contiguity options since the tracts are very different sizes and shapes.) When I use the Global Moran???s I test, I get statistically significant results for each of these methods; results are most similar for inverse distance weighting and distance bad with z-scores being lower for zone of indifference. A distance band was applied to each of the analyses. Do you have any opinions on the best method? If it helps, the data with the polygon is continuous.
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11-19-2012
04:24 PM
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I wanted to roughly measure potential exposure within Ohio. Ideally, I would use air modelling software (e.g., AERMOD or CALPUFF), but this software really isn't built to take into context the vast number of chemicals and sites that exist in Ohio.
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06-07-2012
12:11 PM
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I've found this guide helpful to answer your question; http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Exploratory_Spatial_Data_Analysis_ESDA/00310000000m000000/
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06-07-2012
11:33 AM
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I???ll be using ordinary kriging to create a surface of air pollution for Ohio. My data from the Toxic Release Inventory are annualized, so each case represents the amount of pollutant XYZ given off over an entire year. My question is this: Should I aggregate (with the sum command) in cases where I have multiple chemicals given off by one facility at the exact same lat/long coordinates to create a total pollution score ??? or ??? should I allow for multiple chemical releases at the same location. I ask because I???m afraid I???ll bias the nearby values if I use the total score. Yet, the total score is a reflection of what was released there ??? so I don???t know what to do. Thanks!
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06-07-2012
10:35 AM
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