Re: [R] Problems generating image from tiff file

2009-07-18 Thread Paul Hiemstra
Hi Mehdi, No problem, we all have to start somewhere! Glad to have helped. If you take a look at http://wiki.r-project.org/rwiki/doku.php?id=tips:spatial-data:spatial_data_visualization you will find some tips on how to plot spatial data using spplot. Including how to plot a grid together wit

Re: [R] Problems generating image from tiff file

2009-07-17 Thread Mehdi Khan
Paul, Thank you very much for your explanation. I have only been using R for GIS purposes for about a week, so my expertise in the field is shallow. Your explanation helped me out and I was able to plot the tif file simply by using the spplot command. The reason I was projecting it was that I a

Re: [R] Problems generating image from tiff file

2009-07-17 Thread Paul Hiemstra
Hi Mehdi, PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. I don't mean to rude, but you seem to lack basic knowledge regarding the use of spatial data in R. Starting to use R is hard, but please ask

Re: [R] Problems generating image from tiff file

2009-07-16 Thread Mehdi Khan
when you post this can you please remove the tiff file? my supervisor doesn't want me to let it out. sorry! On Thu, Jul 16, 2009 at 4:02 PM, Mehdi Khan wrote: > I imported the attached tiff file and converted the coordinate system to > long lat and graphed it: > > californiatiff<- readGDAL("cal

[R] Problems generating image from tiff file

2009-07-16 Thread Mehdi Khan
I imported the attached tiff file and converted the coordinate system to long lat and graphed it: californiatiff<- readGDAL("california1.tif") proj4string(californiatiff) > rasterprojection <- spTransform(californiatiff, CRS("+proj=longlat") however, when using the plot command for rasterprojecti