adding a scale
On Fri, 24 Apr 2015, Gilles Benjamin Leduc wrote:
Hi again, So, I use the plot() function. I read a shapefile, that I convert in GPS coordinates like this:
Please do provide a reproducible example. When you have a working reproducible example, you'll find that you have solved your problem. Note that right-assignment is confusing. Have you consulted the R spatial graphics gallery: http://rspatial.r-forge.r-project.org/gallery/ Further note that metric scales are hard to get right on maps in degrees. Usually, the inclusion of annotated axes is a rational substitute for a scale bar, and by default the vertical axis is the same as the North arrow, which is only really needed when vertical is not North. Roger
readOGR(dsn="IS50V_STRANDLINA_24122014_ISN2004/IS50V_STRANDLINA_SHP", layer="is50v_strandlina_flakar_24122014")->IslHD
spTransform(IslHD,CRS(" +proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0 "))->IslHD
then plot : plot(IslHD)
I tried several stuff for making a scale, results were either ugly or wrong?
The function Scalebar make a cute scale but really absurd?
Any idea?
Best regards
Benjamin
On Thursday, April 23, 2015 05:18 GMT, Frede Aakmann T?gersen <frtog at vestas.com> wrote:
Hi Benjamin Yes, there are several ways to do that. But it depends on which kind of plotting function you used. Usually it is a setting of an argument of the plotting function. I cannot help you more since I don't more than the information you provided in your email. If you want more help from this list please provide a small example showing which functions you used with information on which package(s) they belong. Then you'll probably get more help. The small example you can probably find in the example section on the help page for the plotting function. Best Regards Frede Aakmann T?gersen Specialist, M.Sc., Ph.D. Plant Performance & Modeling Technology & Service Solutions T +45 9730 5135 M +45 2547 6050 frtog at vestas.com http://www.vestas.com Company reg. name: Vestas Wind Systems A/S This e-mail is subject to our e-mail disclaimer statement. Please refer to www.vestas.com/legal/notice If you have received this e-mail in error please contact the sender.
-----Original Message----- From: R-sig-Geo [mailto:r-sig-geo-bounces at r-project.org] On Behalf Of Gilles Benjamin Leduc Sent: 23. april 2015 02:46 To: r-sig-geo at r-project.org Subject: [R-sig-Geo] adding a scale Hi all, I am ploting map from shapefiles (curently read with readOGR from rgdal). My PhD supervisor asked me to add a scale? Before going in crazy computation and the arrow function I wonder? Is there a function that can do it automatically (or easily) Thanks in advance Benjamin
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Roger Bivand Department of Economics, Norwegian School of Economics, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 91 00 e-mail: Roger.Bivand at nhh.no