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Thread: Advice to a newbie. How do I bring xy data into my shapefile?

  1. #1
    Jane Cloke
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    Question Advice to a newbie. How do I bring xy data into my shapefile?

    Hi all

    I'm sure this is really simple, please forgive my naivity, I've only been using ArcGIS for a couple of weeks, and only really simple stuff at that.

    I'm planning to do regression analysis (GWR) on several datasets, where all but one is based on census areas (UK OS lower level super output areas, lsoa) for which I have a shape file that describes the polygons. Regression with the census-based variables is easy to set up because both the dependent and explanatory variables are held within the same Input feature.

    The difficulty comes with my final explanatory variable - concentrations at x,y coordinates (UK OS co-ordinates). I believe I need to 'join' or 'relate' with my lsoa shapefile (which is what I've done with the other variables); I've tried all sorts of things such as kriging and extracting to vector, 'relates', 'joins', adding new fields, calculating new fields, but to no avail.

    I'm sure there is someone out there who has done this before - I'd really appreciate your advice.

    thanks

    Jane

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    Lok Kwan
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    Default Re: Advice to a newbie. How do I bring xy data into my shapefile?

    Spatial Join or Display X Y function.

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    Jane Cloke
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    Unhappy Re: Advice to a newbie. How do I bring xy data into my shapefile?

    Thanks, but when I then try to do GWR, the xy data do not show in the variables dropdown lists.

    I think there must be another process/step I need to do

    Jane

  4. #4
    Lok Kwan
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    Default Re: Advice to a newbie. How do I bring xy data into my shapefile?

    Ummm..If I understand your problem correctly, I think you're trying to bring all your independent and dependent variables into the same dataset for the purupose of GWR.
    If you analysis measurement unit is in Census Tract, you can do a spatial join to bring your data in X Y coordinates into the Census Tract shp file. Hope it help.


    Jason

  5. #5
    Jane Cloke
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    Default Re: Advice to a newbie. How do I bring xy data into my shapefile?

    Thanks Jason, I really appreciate your suggestion

    Each polygon (all different shapes and sizes, they are computed as having similar populations) in my census tract overlaps with sseveral x,y. I've tried spatial join, but there does not seem to be an option for the points to be sampled, averaged and then 'joined' with that average.

    Does that make sense?

    thanks

    Jane

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