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The study requires defining a priority program to upgrade poor condition rural roads through the computation of KM/PERSON field. The issue: Rural roads branching from primary roads could lead into several villages (Attached smaple example), therefore looking for an approach to solve the FROM (village centroid) and the TO (Primary and Rural road intersection point) and provide the length of every route (the route should only be the rural road). Not sure if the network analyst could help sovle the issue and if so, would it be the OD cost matrix exercise? Ideas and methods are much appreciated. NB: The study is applied on a contry wide network. Manual querying or geoprocessing is almost impossible. Zak
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08-30-2012
02:44 AM
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Am not sure if there is a missing step in my process, hope someone picks it up! "GWR" + "Moran I" are created in a model and all outputs are generated except the numerical output (shown in the training presentation). Although the generated tables present most of the parameters for the interpretation , some are missing, notable when looking for the "*" to confirm significance or VIF. Another query: Dummy variables are acceptable in OLS but not in GWR. What if my main variable of interest is a Dummy variable? (Lit/Unlit)... I doesn't make sense to just excluded from the analysis in GWR ! Hope that was clear enough to get a reply! TX!
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06-20-2011
04:50 AM
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Any thoughts on how to accurately apply GWR based on point/segment data. I am looking into the correlation btwn road accident severity (pointd) and lit/unlit segments of a motorway. Most of the reading showed GWR applied on areas and not segments. Initial considerations: - dependent variable: centroid of each segment with total crash data weight by severity. - explanatory variables: accidents data variables (lit/unlit, weather, lanes, speed, gender...) Could use any help and advice! Much appreciated. Zak
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05-31-2011
06:44 AM
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