I have the following data frame (long, lat, value) (all coordinates are within Colombia):
Spoints:
x y z
1 -75.67083 7.57916667 7.328901e-19
2 -74.59583 2.34583333 4.470517e-28
3 -73.67083 5.82083333 2.796526e-11
4 -75.31250 8.68750000 2.867735e-20
5 -73.88750 10.47083333 4.460837e-14
6 -73.22083 -1.56250000 3.127243e-35
7 -72.12083 -1.47083333 1.361218e-37
8 -74.54583 9.60416667 1.108581e-37
I would like to create a raster and plot it on Colombia's map.