A mapping system for obtaining field data in the form of soil conditions, soil composition, or crop conditions for a land area, said mapping system comprising: a plurality of autonomously-operated mobile machines for traversing the land area; at least one sensor associated with each of said mobile machines, wherein said sensors are configured to obtain the field data as said mobile machines traverse the land area; and a mapping device comprising a processor and a non-transitory computer readable storage medium with a computer program stored thereon, wherein the processor is configured by the computer program to perform the following steps: instruct the mobile machines to traverse the land area, wherein each of said mobile machines is instructed to travel along an initial drive path, receive the field data obtained by said sensors associated with said mobile machines as said mobile machines travel along their respective initial drive paths, analyze the received field data to determine if the field data associated with any of the initial drive paths deviates from an expected value by more than a predetermined amount, upon a determination that the field data associated with one or more of the initial drive paths deviates from the expected value by more than the predetermined amount, define an anomalous area within the land field, with such anomalous area being adjacent to the one or more initial drive paths that has associated field data which deviates from the expected value, and instruct said mobile machines to traverse along secondary drive paths extending through the anomalous area, wherein the secondary drive paths are different from the initial drive paths and enable the mobile machines to obtain additional field data providing a higher resolution than the field data collected using the initial drive paths. a plurality of autonomously-operated mobile machines for traversing the land area; at least one sensor associated with each of said mobile machines, wherein said sensors are configured to obtain the field data as said mobile machines traverse the land area; and a mapping device comprising a processor and a non-transitory computer readable storage medium with a computer program stored thereon, wherein the processor is configured by the computer program to perform the following steps: instruct the mobile machines to traverse the land area, wherein each of said mobile machines is instructed to travel along an initial drive path, receive the field data obtained by said sensors associated with said mobile machines as said mobile machines travel along their respective initial drive paths, analyze the received field data to determine if the field data associated with any of the initial drive paths deviates from an expected value by more than a predetermined amount, upon a determination that the field data associated with one or more of the initial drive paths deviates from the expected value by more than the predetermined amount, define an anomalous area within the land field, with such anomalous area being adjacent to the one or more initial drive paths that has associated field data which deviates from the expected value, and instruct said mobile machines to traverse along secondary drive paths extending through the anomalous area, wherein the secondary drive paths are different from the initial drive paths and enable the mobile machines to obtain additional field data providing a higher resolution than the field data collected using the initial drive paths. instruct the mobile machines to traverse the land area, wherein each of said mobile machines is instructed to travel along an initial drive path, receive the field data obtained by said sensors associated with said mobile machines as said mobile machines travel along their respective initial drive paths, analyze the received field data to determine if the field data associated with any of the initial drive paths deviates from an expected value by more than a predetermined amount, upon a determination that the field data associated with one or more of the initial drive paths deviates from the expected value by more than the predetermined amount, define an anomalous area within the land field, with such anomalous area being adjacent to the one or more initial drive paths that has associated field data which deviates from the expected value, and instruct said mobile machines to traverse along secondary drive paths extending through the anomalous area, wherein the secondary drive paths are different from the initial drive paths and enable the mobile machines to obtain additional field data providing a higher resolution than the field data collected using the initial drive paths.