Thanks, Sara. For your first question:
Geographic Coordinate System: GCS_North_American_1983_HARN Projected Coordinate System: NAD_1983_HARN_StatePlane_Oregon_North_FIPS_3601_Feet_Intl I have imported the shp file in R by read.shaplefiles(). For your second question: 1) by relative long and lat, I mean distances to the city center from south-north and east-west directions. 2) I know the coordinate of the reference point. Thanks. Best Gary On Wed, Jul 18, 2012 at 11:30 AM, Sarah Goslee <sarah.gos...@gmail.com>wrote: > Hi, > > On Wed, Jul 18, 2012 at 2:11 PM, Gary Dong <pdxgary...@gmail.com> wrote: > > Dear R users, > > > > I have a city map in shape file (polygon). I also have some points that I > > hope to plot them to the city map. > > What projection is the shape file in? Have you successfully imported > it into R yet? > > This page has a nice overview on dealing with shapefiles in R. > > http://www.nceas.ucsb.edu/scicomp/usecases/ReadWriteESRIShapeFiles > > > > The only information I have about those > > points are their relative longitude and latitude to the city center by > > miles. Is there a way that R can help me to do this? Thanks. > > What does "relative longitude and latitude in miles" mean? That makes > no sense to me. Do you mean distance and direction? (Which wouldn't be > latitude and longitude.) > > If the latter, do you know the coordinates of the reference point? > > I think we need more information to be able to help. You might also be > better served by asking on the r-sig-geo list instead of the main > R-help list. > > Sarah > > -- > Sarah Goslee > http://www.functionaldiversity.org > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
