search for: your_lon_high_limit

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Did you mean: your_lat_high_limit
2010 Jul 27
0
3d topographic map [SEC=UNCLASSIFIED]
...ll lon yf <- attr(ETOPO5,'lat') # all lat zf <- ETOPO5 # elevation (3) The topography data has to be flipped horizontally and vertically and you also require the data to be placed on a regular grid and you need to specify limits, xn <- which(xf>=your_lon_low_limit & xf<=your_lon_high_limit) yn <- which(yf>=your_lat_low_limit & yf<=your_lat_high_limit ) x <- xf[xn] y <- yf[yn] z <- zf[xn,yn] za <- apply(z,1,rev) zb <- t(za) yb <- -rev(y) xb <- x nx <- length(xb) dx <- (xb[nx]-xb[1])/(nx-1) ny <- length(yb) dy <- (yb[ny]-yb[1])/(ny-1)...