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 _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
