Horizon sample dataset for mapping soil salinity
data("soil")The format is: Formal class 'SpatialPointsDataFrame' [package "sp"] with 5 slots ..@ data :'data.frame': 152 obs. of 17 variables: .. ..$ Sample : Factor w/ 152 levels "1","10","100",..: 1 65 76 87 98 109 120 131 142 2 ... .. ..$ ProfileID: Factor w/ 87 levels "1","2","3","4",..: 5 53 53 55 55 56 6 7 57 8 ... .. ..$ Latitude : num [1:152] -30.2 -30.3 -30.3 -30.3 -30.3 ... .. ..$ Longitude: num [1:152] 62.2 62.1 62.1 62.1 62.1 ... .. ..$ Horizon : Factor w/ 2 levels "A","B": 1 1 2 1 2 2 1 1 2 1 ... .. ..$ Depth : Factor w/ 43 levels "0 - 100","0 - 17",..: 8 14 37 8 29 42 8 8 38 8 ... .. ..$ Sand : num [1:152] 43.2 61.2 57.2 55.2 65.2 83.2 63.2 63.2 45.2 59.2 ... .. ..$ Silt : num [1:152] 44 24 29 32 22 9 24 24 40 24 ... .. ..$ Clay : num [1:152] 12.8 14.8 13.8 12.8 12.8 7.8 12.8 12.8 14.8 16.8 ... .. ..$ OC : num [1:152] 0.36 0.465 0.39 0.36 0.42 0.87 0.075 0.375 0.84 0.33 ... .. ..$ PH : num [1:152] 8.6 8.37 8.31 8.76 7.81 ... .. ..$ EC : num [1:152] 0.8 2.58 0.98 0.532 1.87 18.5 0.43 0.302 0.345 2.7 ... .. ..$ CaCo3 : num [1:152] 15.2 18.5 20.5 15.8 20 ... .. ..$ K : num [1:152] 67 162 120 124 177 91 127 72 123 158 ... .. ..$ Na : num [1:152] 1073 707 689 646 691 ... .. ..$ CEC : num [1:152] 6 11 18 9 10.4 6 6.4 16 10 4.9 ... .. ..$ ESP : Factor w/ 22 levels "0","1","10","11",..: 11 19 17 20 20 8 17 20 15 11 ... ..@ coords.nrs : num(0) ..@ coords : num [1:152, 1:2] 420924 418226 418226 415334 415334 ... .. ..- attr(*, "dimnames")=List of 2 .. .. ..$ : NULL .. .. ..$ : chr [1:2] "coords.x1" "coords.x2" ..@ bbox : num [1:2, 1:2] 386582 3343117 427796 3386711 .. ..- attr(*, "dimnames")=List of 2 .. .. ..$ : chr [1:2] "coords.x1" "coords.x2" .. .. ..$ : chr [1:2] "min" "max" ..@ proj4string:Formal class 'CRS' [package "sp"] with 1 slot .. .. ..@ projargs: chr "+proj=utm +zone=41 +datum=WGS84 +units=m +no_defs"
A dataset with 87 points of soil horizons for mapping salinity
Hypothetical dataset for salinity mapping