identify methods for sp-class objects
Barry See: library(raster) ?click ?select identity could be a better name than click. And I am sure you can improve these functions. Robert On Fri, Jun 21, 2013 at 10:55 AM, Barry Rowlingson
<b.rowlingson at lancaster.ac.uk> wrote:
Has anyone written a set of 'identify' methods for sp-class objects? For example, given a spatial polygons data frame, I want to do: plot(spdf) identify() [click click click] [1] 23 NA 5 showing my mouse clicks were over polygon 23, no polygon, polygon 5. For overlapping spdfs, an option might be: identify(multi=TRUE) which would return a list of polygon indices under each click. For spatial line structures, a similar function would either return the nearest line feature, or all line features within a tolerance. Similarly for SpatialPoints. If these don't exist in some package, then I have a job for the weekend... Barry
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