1. A method for guiding a vehicle, the method comprising: determining preliminary guidance data for the vehicle based a location-determining receiver associated with the vehicle during an evaluation time window; collecting vision data from a vision module associated with the vehicle during the evaluation time window; determining vision guidance data from the collected vision data; estimating vision quality data for at least one of the vision data and the vision guidance data during the evaluation time window, the vision quality data based on a cross correlations and an r-squared value, the cross correlation being between an observed intensity profile of the vision data in a section and a reference intensity profile to determine row center positions and an r-squared value being between a regression path and the row center positions; and adjusting the preliminary guidance data to a revised guidance data based on the vision guidance data such that the revised guidance data is registered with or generally coextensive with the vision guidance data, if the vision quality data exceeds a minimum threshold.