Latest Contributions by deleted-user--yAfL35IvMX_

Software: RStudio Data: a world elevation map, elev, which was downloaded from Manuel Gimond's web site The original crs is as follows: +proj=longlat +ellps=WGS84 +towgs84=0,0,0,0,0,0,0 +no_defs I did a test as follows, just out of curiosity: elev_projected <- projectRaster(elev, crs = "+proj=utm +ellpse=WGS84")  # the +zone= parameter not specified  In ArcGIS Desktop, when projecting to UTM, we have to specify which specific zone to use. R, however, seems to allow this to happen w/o complaining. Even though there was a warning message, the raster was projected anyway.  3 projected point(s) not finite The extent of the output is as follows: xmin : -14587336 xmax : 14350664 ymin : -19985214 ymax : 20161986 I wonder what actually happens when the zone parameter is missing from the proj string. Does this string make any sense? The output map is attached. Thanks.        ... View more

Goal: to make a map showing how far North Korea's missiles could reach Platforms used: ArcMap and Pro Tools used: Buffer, Multiple Ring Buffer Input: a polygon feature class, NK, referenced in wgs84 Distance: 1500, 6000, 9000, etc Buffer unit: km Issues: In Pro, the output from Multiple Ring Buffer is clearly just a planar circle (red) while the Buffer tool works perfectly (the blue layer). The problem remains even after I specify the Output Coordinate System in Environments. Both tools in ArcMap worked well using the same parameters.     Please help. Many thanks! ... View more