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 (min, max) Raster Attribute Table fields : ID COUNT Red Green Blue Land.Cover.Class Opacity min : 0 0 0.00 0.00 0.00 0 max : 255 221606161 0.98 0.98 0.98 Woody Wetlands 1 You'll have to work through the documentation for rasters to understand how to work with these data. The raster package requires rgdal to load this format, and you could do that more directly with require(rgdal) r <- readGDAL("hi_landcover_wimperv_9-30-08_se5.img") though arguably raster is probably a better place to start. Cheers, Mike. On Thu, Dec 6, 2012 at 1:10 PM, Milan Sharma <milansharma2...@yahoo.com> wrote: > Hi List, > I wanted to download national land cover data of USA, 2006 which I could > convert to shape file and do analysis. The website is > http://www.mrlc.gov/nlcd01_data.php. > I got the following 6 files in it: > 1. appendix1_nlcd2006_scene_list_by_path_row_txt > 2. appendix1_nlcd2006_scene_list_by_path_zone_txt > 3. metadata_nlcd2006_lc_4-20-11-txt > 4. metadata_nlcd2006_lc_4-20-11-se5.ige > 5. metadata_nlcd2006_lc_4-20-11-se5.img > 6.metadata_nlcd2006_lc_4-20-11-se5.rrd > > I didn't see any shape file in here, or will I get the shape file from any > one the above file formats? > (Has anybody in the list downloaded such data?) (or can anybody instruct me > of how to get it done? > Thanks so much for your help, > Milan > [[alternative HTML version deleted]] > > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > -- Michael Sumner Hobart, Australia e-mail: mdsum...@gmail.com _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
