GSIF (version 0.3-1)

afss: Africa Sentinel Site data

Description

Africa soil sampled collected at AfSIS sentinel sites. Part of the http://www.africasoils.net/data/ldsf-description{African Land Degradation Surveillance Framework} (LDSF) Field Database.

Usage

data(afss)

encoding

latin1

References

• Vagen, T., Shepherd, K. D., Walsh, M. G., Winowiecki, L., Desta, L. T., \& Tondoh, J. E. (2010)http://worldagroforestry.org/sites/default/files/afsisSoilHealthTechSpecs_v1_smaller.pdf{AfSIS technical specifications: soil health surveillance}. World Agroforestry Centre, Nairobi, Kenya.

Examples

library(sp)
library(rgdal)

data(afss)
xy <- afss$sites
coordinates(xy) <- ~ LONWGS84 + LATWGS84
proj4string(xy) <- "+proj=latlong +datum=WGS84"
## obtain country borders:
if(is.na(file.info("admin.af.rda")$size)){
download.file("http://gsif.isric.org/lib/exe/fetch.php?media=admin.af.rda", 
   "admin.af.rda")
}
try(load("admin.af.rda"))
proj4string(admin.af) <- get("ref_CRS", envir = plotKML.opts)
admin.af <- as(admin.af, "SpatialLines") 
## overlay and plot points and maps:
plot(admin.af, col="darkgrey", xlim=xy@bbox[1,], ylim=xy@bbox[2,])
points(xy, pch=21, bg="white", cex=.6, col="black")
## obtain MIR measurements:
if(is.na(file.info("afss.spec.rda")$size)){
download.file("http://gsif.isric.org/lib/exe/fetch.php?media=afss.spec.rda", 
  "afss.spec.rda")
}
try(load("afss.spec.rda"))