Defining Holes Inside a Polygon
Hi List. I?m trying to solve an issue here, but it?s getting tricky. I have an MapGen .dat file (attached) that contains about 39 closed lines. Three of them (the largest ones) will be my main polygons and the rest of them must become holes inside one of the three major areas. I?m able to transform all the closed lines into SpatialPolygons and even create shapefiles with them, but how can I modify the ?hole? slot of the smaller polygons so I can keep them transparent when overlaying another map (those holes will overlay islands of a raster image)? Thank you for the attention and help. Regards. ------------------------------------------------------------------- MSc. <mailto:r.aluizio at gmail.com> Rodrigo Aluizio Centro de Estudos do Mar/UFPR Laborat?rio de Foramin?feros e Micropaleontologia Ambiental Avenida Beira Mar s/n - CEP 83255-971 Pontal do Paran? - PR - Brazil -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://stat.ethz.ch/pipermail/r-sig-geo/attachments/20101105/1d7fee34/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: PCForams.dat Type: application/octet-stream Size: 133962 bytes Desc: not available URL: <https://stat.ethz.ch/pipermail/r-sig-geo/attachments/20101105/1d7fee34/attachment.obj>