[Openspace] opening my shape file
munroe.9 at osu.edu
Wed Nov 24 10:20:02 CST 2004
Oh yeah - you're exactly right. The census bureau databases generally have IDs formatted as text - it's odd. I guess it must be because of the nesting structure of some it - i.e., FIPS - you have county, state, etc. - which they break to separate fields to minimize redundancy of the database, but in order to preserve leading zeros, they have to convert it to text.
Anyway - it seems to me that whenever GeoDa tells you your IDs are not unique (and you know they are - which may not always be the case, i.e., with two parts of MI, I think sometimes you get data of more than one polygon with the same ID), to check the formatting of the ID.
Happy Turkey Day, GeoDa users!
----- Original Message -----
From: Mihai Nica <m_nica at hotmail.com>
Date: Wednesday, November 24, 2004 10:11 am
Subject: Re: [Openspace] opening my shape file
> Alternatively, check the FIPS in arcview and then create a new
> field "=
> FIPS" but in the right format (with field calculator). I did it
> before and
> it works.
> Mihai Nica
> Jackson State University
> 155 B Parkhurst Dr.
> Jackson, MS 39202
> 601 969 5423
> 601 914 0361
> ----- Original Message -----
> From: "Darla Munroe" <munroe.9 at osu.edu>
> To: "Debra Hevenstone" <dhevenst at umich.edu>
> Cc: <openspace at agec221.agecon.uiuc.edu>
> Sent: Wednesday, November 24, 2004 11:08 AM
> Subject: Re: [Openspace] opening my shape file
> > the first thing to do is check the format of your ID variable -
> it needs
> not to have decimal places.
> > Another easy thing to do is go back in ArcMap, open the table,
> add a new
> variable (called NID or something), and set its value equal to
> "FID + 1" -
> FID is the internal numbering system for ArcGIS, and it starts
> with 0, so
> you have to add one.
> > Anyway - I've had those problems in GeoDa before - I think it's
> just a
> formatting issue, and when in doubt, create a new id.
> > ----- Original Message -----
> > From: Debra Hevenstone <dhevenst at umich.edu>
> > Date: Saturday, November 20, 2004 4:55 pm
> > Subject: [Openspace] opening my shape file
> > > I have two files- a shape file w/ point data on zip codes and a
> > > anotherfile w/ my data by zipcode. When I try to open my shp file
> > > it tells me
> > > "zip" (my variable of interest) "is not unique"
> > >
> > > I'm not quite sure what to do- I did my descriptives in
> arcview but
> > > there's analysis I need to do either in Geoda or get the spatial
> > > analystextension from my university. Any clues as to why I can
> > > load my shp files
> > > in arcview but not in Geoda?
> > >
> > > Thanks,
> > > Debra Hevenstone
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