Some data, such as soil moisture, vegetation cover, and chlorophyll content can be measured through remote sensing. Other soil properties however, require sampling of soil cores and analysis of those samples in a lab. As long as the location of the samples is recorded through a GPS, it is possible to create a soil map of the field, for each characteristic of the soil. In the previous example we can see a map of a field for each of phosphorus (P), potassium (K) and acidity (pH).