[R-sig-Geo] Editing Shapefiles

[Susumu Tanimura]

Dear Malcolm and R-sig-Geo members

Map object from shapefiles with read.shape() can be merged or
clipped.  Here are examples written in Japanese but the code is
universal.

For clipping
http://www.okada.jp.org/RWiki/index.php?ShapeFile%A5%E9%A5%A4%A5%D6%A5%E9%A5%EA

For Union and Dissolve
http://www.okada.jp.org/RWiki/index.php?cmd=read&page=Rmap%A4%F2%BB%C8%A4%C3%A4%BF%C3%CF%BF%DE%C9%BD%BC%A8&word=Rmap#content_1_35

In addition, You can use shapefiles from R to GoogleEarth.
http://www.okada.jp.org/RWiki/index.php?GoogleEarth%A4%C8R