On Wed, 29 Apr 2009, Alina Sheyman wrote:
Using examples in Chapter 5, I am trying to get rid of non-unique polygons.
Actually, maybe my advice wasn't well-judged, unless you are happy to
interpret code in a fairly naked setting, you may actually need the book
text to see what is going on. T
Aslo, this function seems to wipe out my file
zipmaps1a <- unionSpatialPolygons(zipmaps1, IDs=paste(zipmaps1$ZCTA,
zipmaps1$NAME, sep = " "))
when I run names(zipmaps1a), after I run the above command I get NULL
On Wed, Apr 29, 2009 at 12:11 PM, Alina Sheyman wrote:
> Using examples in Chapter
Using examples in Chapter 5, I am trying to get rid of non-unique polygons.
I'm working with a Massachusetts shapefile by zips. The file consists the
following fields
ZCTA NAME LSAD LSAD_TRANS
I've done the following to get rid of duplicate records
> zipmaps1_df <- as(zipmaps1, "data.frame")
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