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Hi Cedric Thanks for your reply. There are no points. The number of responding firemen per station is stored strictly in the polygons. Attribute Table looks something like this: FID ShftA ShftB ShftC StatID 0 5 6 4 23 1 6 6 6 21 etc etc Each station has their own set of numbers. I need to know how many people are available in the overlap areas... so where station 23 and station 21 meet/overlap, for that particular little area, we should have 11 people for shiftA, 12 people for ShiftB, and 10 people for shiftC. The process needs to be able to run from a model because we will be running scenarios where we move the personnel around to different shifts and stations, there are too many stations (and overlap areas) for me to rerun this entire thing by hand every time a chief moves someone. I hope this makes more sense.
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06-17-2010
10:17 AM
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Update: The model I've built calls our Network Dataset, creates a new 7min service area, adds the firestations as locations, and then solves. I used select features to pull the resulting polygons, then copied them into a new shapfile called FireDistib, then joined the table with the staffing counts using the Station Numbers as the Key ID field. Easy enough. The Intersect tool gives me the individual geometries of the overlapping areas, but I am desperately trying to avoid having to run things by hand as we are going to test different placements and staffing options. Rasterizing the data may work, but I'm not sure which tool would add the values in the ShiftCnt field (which is a float field). Still working, let me know if anyone has any ideas 😄
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06-17-2010
07:52 AM
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I am trying to calculate the number of fire fighters that can reach an area within seven minutes. I created polygons of each seven minute service area. The polygons overlap in some areas. I want to build a model that will take the intersection of each overlapping polygon and add the value from each of the two original polygons together creating a new polygon with the sum of the two service areas. Anyone have any ideas on how to do this?
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06-16-2010
11:30 AM
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