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I'm a new users of spatial analyses packages in R. I have created a SpatialPolygonsDataFrame which contains a number of rectangular polygons that i named "Square1" to "Square64". Until now there is no problem i can plot these polygons on a map. The problem is that i have a data.frame that contains the number of vesels in each "Square_i" (i=1 to 64) polygon, but i don't know how to relate each polygons in my SpatialPolygonsDataFrame object to the data.
Can anyone help me?
In a SpatialPolygonsDataFrame, the polygons and the dataframe should automatically link up through the names of the polygons or the row.names of the dataframe. Assuming your SpatialPolygonsDataFrame is called spdf take a look at:
row.names(spdf@data)
names(spdf@polygons)
