________________________________
From: Michael Sumner <mdsumner at gmail.com>
Sent: Wednesday, December 5, 2012 11:13 PM
Subject: Re: [R-sig-Geo] Shape file of USA land cover data
sessionInfo() will tell you what's loaded and install.packages("rgdal") in a fresh session will install latest, depending on your system
On Thursday, December 6, 2012, Milan Sharma wrote:
Mike, I just updated my R (I uninstalled the previous version of R and installed R version 2.15.2). Still, I get the same error message.
BY the way, how do I check what version of rgdal version do I have and how to update that to higher one?
Milan
Subject: Re: [R-sig-Geo] Shape file of USA land cover data
The error message already advises on what is required: "you use rgdal
version: 0.7-19. You need version 0.7-22 or higher".
Is that not clear somehow? It's important to read the messages and
work on understanding them.
Please upgrade to latest rgdal and raster, it only creates extra work
trying to chase issues with outdated versions. If you have trouble
upgrading then that's another topic, for another list. The "R
Installation and Administration" manual is the first port of call for
maintaining your R installation, but how to do it exactly will depend
on your set up, operating system, whether your R is current, and other
things that we do not know.
Cheers, Mike.
rote:
Hi Erin,
I got the following error..
Can you advise me of the solution?
setwd("C://Users//milan//Desktop")
r <- raster("nlcd2006_landcover_4-20-11_se5.img")
Error in .requireRgdal(FALSE) : you use rgdal version: 0.7-19
You need version 0.7-22 or higher
________________________________
From: "Hodgess, Erin" <HodgessE at uhd.edu>
To: Michael Sumner <mdsumner at gmail.com>; Milan Sharma
Cc: "r-sig-geo at r-project.org" <r-sig-geo at r-project.org>
Sent:
Wednesday, December 5, 2012 9:45 PM
Subject: RE: [R-sig-Geo] Shape file of USA land cover data
Hi
I got the same data set that Milan did and used the raster:
r <- raster("c://goodc//nlcd2006_landcover_4-20-11_se5.img")
and it worked. When I used gdal, it said that it was too big.
Thanks,
Erin
PS the plot looks really nice too.
________________________________________
From: r-sig-geo-bounces at r-project.org [r-sig-geo-bounces at r-project.org] on
behalf of Michael Sumner [mdsumner at gmail.com]
Sent: Wednesday, December 05, 2012 8:34
PM
To: Milan Sharma
Cc: r-sig-geo at r-project.org
Subject: Re: [R-sig-Geo] Shape file of USA land cover data
It's not a shapefile, and it's not a vector format. It's a gridded
(raster) format. Specifically it's an Erdas Imaging (.img) format:
http://www.gdal.org/frmt_hfa.html
I tried the Hawaii one which is much smaller (2.4Mb) and so more
reasonable to share.
http://gisdata.usgs.gov/TDDS/DownloadFile.php?TYPE=nlcdhi&FNAME=HI_landcover_wimperv_9-30-08_se5.zip
You seem to have found metadata files, but I haven't found what you
presented to us.
I get this:
list.files()
[1] "hi_landcover_wimperv_9-30-08_se5.img"
[2] "hi_landcover_wimperv_9-30-08_se5.rrd"
[3] "landcov_meta_web_final"
library(raster)
r <- raster("hi_landcover_wimperv_9-30-08_se5.img")
r
class : RasterLayer
dimensions : 12618, 19439, 245281302 (nrow, ncol, ncell)
resolution : 30, 30 (x, y)
extent : -345945, 237225, 1753875, 2132415 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=aea +lat_1=8.000000000000002 +lat_2=18 +lat_0=3
+lon_0=-157 +x_0=0 +y_0=0 +ellps=WGS84 +towgs84=0,0,0,0,0,0,0 +units=m
+no_defs
data source :
C:\Users\Michaels\Downloads\HI_landcover_wimperv_9-30-08_se5\hi_landcover_wimperv_9-30-08_se5.img
names : hi_landcover_wimperv_9.30.08_se5
values : 0, 95 (mi