Dear all,
This may seem a very obvious question but I'm suck and for the past 2h I haven't been able of solving the problem. So for the sake of productivity I'll ask for some help: I have a SpatialPolygon Class that looks like(see bellow) in the example below I have only 2 polygons but they will be thousands. What I'm trying to achieve is a list with the total area of each polygon. Thanks in advance > str(res) Formal class 'SpatialPolygons' [package "sp"] with 4 slots ..@ polygons :List of 2 .. ..$ :Formal class 'Polygons' [package "sp"] with 5 slots .. .. .. ..@ Polygons :List of 9 .. .. .. .. ..$ :Formal class 'Polygon' [package "sp"] with 5 slots .. .. .. .. .. .. ..@ labpt : num [1:2] 3.19 51.68 .. .. .. .. .. .. ..@ area : num 8.96e-05 .. .. .. .. .. .. ..@ hole : logi FALSE .. .. .. .. .. .. ..@ ringDir: int 1 .. .. .. .. .. .. ..@ coords : num [1:5, 1:2] 3.18 3.18 3.19 3.2 3.18 ... . . . .. .. .. ..@ plotOrder: int [1:9] 9 8 2 3 1 4 7 5 6 .. .. .. ..@ labpt : num [1:2] 3.14 51.67 .. .. .. ..@ ID : chr "2" .. .. .. ..@ area : num 0.000993 ..@ plotOrder : int [1:2] 2 1 ..@ bbox : num [1:2, 1:2] 3.09 51.66 3.26 51.73 .. ..- attr(*, "dimnames")=List of 2 .. .. ..$ : chr [1:2] "x" "y" .. .. ..$ : chr [1:2] "min" "max" ..@ proj4string:Formal class 'CRS' [package "sp"] with 1 slots .. .. ..@ projargs: chr NA Rui Catarino Scientific Officer Fishery Systems Group Marine Scotland - Science Scottish Government | 36 |B |Marine Laboratory, PO Box 101| 375, Victoria Road | Aberdeen AB11 9DB Tel: +44 (0)1224 295572 Mob:+44 (0)7530 240666 Fax: +44 (0)1224 295511 e: r.catar...@marlab.ac.uk w: http://www.scotland.gov.uk/marinescotland <http://www.scotland.gov.uk/marinescotland> ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please visit http://www.symanteccloud.com ______________________________________________________________________ [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
