8.9 Data Subsets in Maps

# Fig. 8.15: Cu in O-horizon, subsets FIN, NOR, RUS
library(StatDA)
data(ohorizon)
data(kola.background)
data(chorizon)

# only samples from same locations in both layers:
c.ind=NULL
o.ind=NULL
c.id=chorizon[,1]
o.id=ohorizon[,1]
for (i in 1:1000){
if (sum(c.id==i)+sum(o.id==i)==2){
c.ind=c(c.ind,which(c.id==i))
o.ind=c(o.ind,which(o.id==i))
}
}

coun=chorizon[c.ind,"COUN"]
count=factor(coun,levels=c("FIN","NOR","RUS"),labels=c("Finland","Norway","Russia"))

el=ohorizon[o.ind,"Cu"]
X=ohorizon[o.ind,"XCOO"]
Y=ohorizon[o.ind,"YCOO"]


# true representation of x and y axis of map for plot
xwid=diff(range(X))/12e4
ywid=diff(range(Y))/12e4


pdf("fig-8-15.pdf",width=2*xwid,height=2*ywid)
par(mfrow=c(2,2),mar=c(1.5,1.5,1.5,1.5))


### NEW MAP:
# generate plot with background
plot(X,Y,frame.plot=FALSE,xaxt="n",yaxt="n",xlab="",ylab="",type="n")
plotbg(map.col=c("gray","gray","gray","gray"),add.plot=T)

SymbLegend(X,Y,el,type="percentile",qutiles<-c(0,0.05,0.25,0.75,0.95,1),symbtype="EDA",symbmagn=0.8,
leg.position="topright",leg.title="Cu (O-hor) [mg/kg]",leg.title.cex=0.8,leg.round=1,leg.wid=5,leg.just="right")

# Text
text(min(X)+diff(range(X))*4/7,max(Y),paste(qutiles*100,collapse=","),cex=0.8)
text(min(X)+diff(range(X))*4/7,max(Y)-diff(range(Y))/25,"Percentiles",cex=0.8)

# scalebar
scalebar(761309,7373050,861309,7363050,shifttext=-0.5,shiftkm=37e3,sizetext=0.8)
# North arrow
Northarrow(362602,7818750,362602,7878750,362602,7838750,Alength=0.15,Aangle=15,Alwd=1.3,Tcex=1.6)


### NEW MAP:
# take symbols according to quantiles:
X.sub=X[count=="Finland"]
Y.sub=Y[count=="Finland"]
el.sub=el[count=="Finland"]

# generate plot with background
plot(X,Y,frame.plot=FALSE,xaxt="n",yaxt="n",xlab="",ylab="",type="n")
plotbg(map.col=c("gray","gray","gray","gray"),add.plot=T)

SymbLegend(X.sub,Y.sub,el.sub,type="percentile",qutiles<-c(0,0.05,0.25,0.75,0.95,1),symbtype="EDA",symbmagn=0.8,
leg.position="topright",leg.title="Cu (O-hor) [mg/kg]",leg.title.cex=0.8,leg.round=1,leg.wid=5,leg.just="right")

# Text
text(min(X)+diff(range(X))*4/7,max(Y),paste(qutiles*100,collapse=","),cex=0.8)
text(min(X)+diff(range(X))*4/7,max(Y)-diff(range(Y))/25,"Percentiles",cex=0.8)

# scalebar
scalebar(761309,7373050,861309,7363050,shifttext=-0.5,shiftkm=37e3,sizetext=0.8)
# North arrow
Northarrow(362602,7818750,362602,7878750,362602,7838750,Alength=0.15,Aangle=15,Alwd=1.3,Tcex=1.6)


### NEW MAP:
# take symbols according to quantiles:
X.sub=X[count=="Norway"]
Y.sub=Y[count=="Norway"]
el.sub=el[count=="Norway"]

# generate plot with background
plot(X,Y,frame.plot=FALSE,xaxt="n",yaxt="n",xlab="",ylab="",type="n")
plotbg(map.col=c("gray","gray","gray","gray"),add.plot=T)

SymbLegend(X.sub,Y.sub,el.sub,type="percentile",qutiles<-c(0,0.05,0.25,0.75,0.95,1),symbtype="EDA",symbmagn=0.8,
leg.position="topright",leg.title="Cu (O-hor) [mg/kg]",leg.title.cex=0.8,leg.round=1,leg.wid=5,leg.just="right")

# Text
text(min(X)+diff(range(X))*4/7,max(Y),paste(qutiles*100,collapse=","),cex=0.8)
text(min(X)+diff(range(X))*4/7,max(Y)-diff(range(Y))/25,"Percentiles",cex=0.8)

# scalebar
scalebar(761309,7373050,861309,7363050,shifttext=-0.5,shiftkm=37e3,sizetext=0.8)
# North arrow
Northarrow(362602,7818750,362602,7878750,362602,7838750,Alength=0.15,Aangle=15,Alwd=1.3,Tcex=1.6)


### NEW MAP:
# take symbols according to quantiles:
X.sub=X[count=="Russia"]
Y.sub=Y[count=="Russia"]
el.sub=el[count=="Russia"]

# generate plot with background
plot(X,Y,frame.plot=FALSE,xaxt="n",yaxt="n",xlab="",ylab="",type="n")
plotbg(map.col=c("gray","gray","gray","gray"),add.plot=T)

SymbLegend(X.sub,Y.sub,el.sub,type="percentile",qutiles<-c(0,0.05,0.25,0.75,0.95,1),symbtype="EDA",symbmagn=0.8,
leg.position="topright",leg.title="Cu (O-hor) [mg/kg]",leg.title.cex=0.8,leg.round=1,leg.wid=5,leg.just="right")

# Text
text(min(X)+diff(range(X))*4/7,max(Y),paste(qutiles*100,collapse=","),cex=0.8)
text(min(X)+diff(range(X))*4/7,max(Y)-diff(range(Y))/25,"Percentiles",cex=0.8)

# scalebar
scalebar(761309,7373050,861309,7363050,shifttext=-0.5,shiftkm=37e3,sizetext=0.8)
# North arrow
Northarrow(362602,7818750,362602,7878750,362602,7838750,Alength=0.15,Aangle=15,Alwd=1.3,Tcex=1.6)


dev.off()