Revision 7210104d
Added by Jim Regetz over 13 years ago
- ID 7210104d0ddbf40cd0fe0ff5aa2c63b4fa42dfda
| terrain/dem/dem-fusion.txt | ||
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plot(crop(blendgau, window), main="south gaussian blend (hillshade)") |
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dev.off() |
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#======================================================================= |
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# R -- assess boundary artifacts with respect to slope |
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#======================================================================= |
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s.aster <- raster("aster_300straddle_s.tif")
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s.srtm <- raster("srtm_150below_s.tif")
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s.uncor <- raster("fused_300straddle_s.tif")
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s.eramp <- raster("fused_300straddle_rampexp_s.tif")
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s.bg <- raster("fused_300straddle_blendgau_s.tif")
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s.can <- raster("cdem_300straddle_s.tif")
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rmse <- function(r1, r2) {
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sqrt(rowMeans(as.matrix((r1 - r2)^2), na.rm=TRUE)) |
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} |
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pdf("slope-rmse.pdf", height=8, width=11.5)
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par(mfrow=c(2,3), omi=c(1,1,1,1)) |
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lats300 <- yFromRow(s.aster, 1:nrow(s.aster)) |
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lats150 <- yFromRow(s.srtm, 1:nrow(s.srtm)) |
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# Latitudinal RMSE profiles with respect to ASTER |
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plot(lats300, rmse(s.uncor, s.aster), type="l", xlab="Latitude", |
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ylab="RMSE", ylim=c(0, 5)) |
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lines(lats150, rmse(crop(s.uncor, extent(s.srtm)), s.srtm), col="blue") |
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legend("topright", legend=c("ASTER", "SRTM"), col=c("black", "blue"),
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lty=c(1, 1), bty="n") |
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text(min(lats300), 4.5, pos=4, font=3, labels="uncorrected") |
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abline(v=60, col="red", lty=2) |
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mtext("Slope discrepancies with respect to separate ASTER/SRTM components",
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adj=0, line=2, font=2) |
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plot(lats300, rmse(s.eramp, s.aster), type="l", xlab="Latitude", |
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ylab="RMSE", ylim=c(0, 5)) |
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lines(lats150, rmse(crop(s.eramp, extent(s.srtm)), s.srtm), col="blue") |
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legend("topright", legend=c("ASTER", "SRTM"), col=c("black", "blue"),
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lty=c(1, 1), bty="n") |
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text(min(lats300), 4.5, pos=4, font=3, labels="exponential ramp") |
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abline(v=60, col="red", lty=2) |
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plot(lats300, rmse(s.bg, s.aster), type="l", xlab="Latitude", |
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ylab="RMSE", ylim=c(0, 5)) |
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lines(lats150, rmse(crop(s.bg, extent(s.srtm)), s.srtm), col="blue") |
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legend("topright", legend=c("ASTER", "SRTM"), col=c("black", "blue"),
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lty=c(1, 1), bty="n") |
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text(min(lats300), 4.5, pos=4, font=3, labels="gaussian blend") |
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abline(v=60, col="red", lty=2) |
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# Latitudinal RMSE profiles with respect to CDEM |
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plot(lats300, rmse(s.uncor, s.can), type="l", xlab="Latitude", |
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ylab="RMSE", ylim=c(0, 5)) |
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text(min(lats300), 4.5, pos=4, font=3, labels="uncorrected") |
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abline(v=60, col="red", lty=2) |
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mtext("Slope discrepancies with respect to Canada DEM",
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adj=0, line=2, font=2) |
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plot(lats300, rmse(s.eramp, s.can), type="l", xlab="Latitude", |
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ylab="RMSE", ylim=c(0, 5)) |
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text(min(lats300), 4.5, pos=4, font=3, labels="exponential ramp") |
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abline(v=60, col="red", lty=2) |
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plot(lats300, rmse(s.bg, s.can), type="l", xlab="Latitude", |
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ylab="RMSE", ylim=c(0, 5)) |
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text(min(lats300), 4.5, pos=4, font=3, labels="gaussian blend") |
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abline(v=60, col="red", lty=2) |
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dev.off() |
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#### |
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corByLat <- function(r1, r2, rows) {
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if (missing(rows)) {
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rows <- 1:nrow(r1) |
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} |
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m1 <- as.matrix(r1) |
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m2 <- as.matrix(r2) |
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sapply(rows, function(row) cor(m1[row,], m2[row,], |
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use="pairwise.complete.obs")) |
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} |
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pdf("slope-corr.pdf", height=8, width=11.5)
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par(mfrow=c(2,3), omi=c(1,1,1,1)) |
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lats300 <- yFromRow(s.aster, 1:nrow(s.aster)) |
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lats150 <- yFromRow(s.srtm, 1:nrow(s.srtm)) |
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ylim <- c(0.65, 1) |
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# Latitudinal RMSE profiles with respect to ASTER |
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plot(lats300, corByLat(s.uncor, s.aster), type="l", xlab="Latitude", |
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ylab="Correlation", ylim=ylim) |
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lines(lats150, corByLat(crop(s.uncor, extent(s.srtm)), s.srtm), col="blue") |
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legend("bottomright", legend=c("ASTER", "SRTM"), col=c("black", "blue"),
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lty=c(1, 1), bty="n") |
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text(min(lats300), min(ylim), pos=4, font=3, labels="uncorrected") |
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abline(v=60, col="red", lty=2) |
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mtext("Slope correlations with separate ASTER/SRTM components",
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adj=0, line=2, font=2) |
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plot(lats300, corByLat(s.eramp, s.aster), type="l", xlab="Latitude", |
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ylab="Correlation", ylim=ylim) |
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lines(lats150, corByLat(crop(s.eramp, extent(s.srtm)), s.srtm), col="blue") |
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legend("bottomright", legend=c("ASTER", "SRTM"), col=c("black", "blue"),
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lty=c(1, 1), bty="n") |
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text(min(lats300), min(ylim), pos=4, font=3, labels="exponential ramp") |
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abline(v=60, col="red", lty=2) |
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plot(lats300, corByLat(s.bg, s.aster), type="l", xlab="Latitude", |
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ylab="Correlation", ylim=ylim) |
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lines(lats150, corByLat(crop(s.bg, extent(s.srtm)), s.srtm), col="blue") |
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legend("bottomright", legend=c("ASTER", "SRTM"), col=c("black", "blue"),
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lty=c(1, 1), bty="n") |
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text(min(lats300), min(ylim), pos=4, font=3, labels="gaussian blend") |
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abline(v=60, col="red", lty=2) |
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# Latitudinal correlation profiles with respect to CDEM |
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plot(lats300, corByLat(s.uncor, s.can), type="l", xlab="Latitude", |
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ylab="Correlation", ylim=ylim) |
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text(min(lats300), min(ylim), pos=4, font=3, labels="uncorrected") |
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abline(v=60, col="red", lty=2) |
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mtext("Slope correlations with Canada DEM",
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adj=0, line=2, font=2) |
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plot(lats300, corByLat(s.eramp, s.can), type="l", xlab="Latitude", |
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ylab="Correlation", ylim=ylim) |
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text(min(lats300), min(ylim), pos=4, font=3, labels="exponential ramp") |
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abline(v=60, col="red", lty=2) |
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plot(lats300, corByLat(s.bg, s.can), type="l", xlab="Latitude", |
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ylab="Correlation", ylim=ylim) |
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text(min(lats300), min(ylim), pos=4, font=3, labels="gaussian blend") |
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abline(v=60, col="red", lty=2) |
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dev.off() |
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Also available in: Unified diff
added slope boundary descrepancy plotting code