subject:"\[R\] Dissolve polygon"

Re: [R] Dissolve polygon

2012-07-20 Thread Barry Rowlingson

On Fri, Jul 20, 2012 at 4:51 PM, Celine wrote: > Hi, > > I am working with a SpatialPolygonsDataFrame of many islands. There are a > lot of polygons (islands) composing my SpatialPolygonsDataFrame. > I want to extract the elevation of each island. Is each island a row in your SPDF? Or is it jus

[R] Dissolve polygon

2012-07-20 Thread Celine

Hi, I am working with a SpatialPolygonsDataFrame of many islands. There are a lot of polygons (islands) composing my SpatialPolygonsDataFrame. I want to extract the elevation of each island. I need to separate the different polygons (like dissolve function in arcgis), to have the elevation of eac