Method for comparing two maps (10, 20) with landmarks (A, B) stored therein, comprising features of a road infrastructure, wherein the following steps are carried out by an apparatus of a vehicle, which has a receiving device, a comparison device and an output device: - receiving first and second maps (10, 11) by means of the receiving device; - selecting at least one portion of the first map and of the second map, which portions in each case correspond to one another, - comparing the at least one portion of the first map with the corresponding portion in the second map by means of the comparison device, wherein a similarity between the portion of the first map and the corresponding portion in the second map is determined on the basis of a match between the landmarks (A, B) stored in each of the two portions (11, 21), and wherein the similarity of the compared portion (11, 21) is expressed in the form of a similarity value derived therefrom, wherein the similarity value is calculated as an F1 score as a score for the match, - outputting and/or providing the similarity value to an assistance system of a vehicle, which, on the basis of the similarity value provided, makes a statement about the quality of the first map and/or the second map and decides whether precise navigation and/or automated driving is possible or not; and wherein the comparison comprises the following substeps carried out by the comparison device: - finding landmarks (A, B) in the mutually corresponding portions (11, 21) of the first and the second map (10, 20), - calculating an accuracy ("precision") as the ratio of the number of landmarks (A, B) in the portion of the second map that can be assigned to a landmark (A, B) in the first map, to the number of landmarks (A, B) in the portion of the second map, - calculating a hit rate ("recall") as the ratio of the number of landmarks (A, B) in the portion of the first map that can be assigned to a landmark (A, B) in the second map, to the number of landmarks (A, B) in the portion of the first map, - calculating the F1 score according to the formula: F 1 = 2 * precision * recall / precision + recall. - receiving first and second maps (10, 11) by means of the receiving device; - selecting at least one portion of the first map and of the second map, which portions in each case correspond to one another, - comparing the at least one portion of the first map with the corresponding portion in the second map by means of the comparison device, wherein a similarity between the portion of the first map and the corresponding portion in the second map is determined on the basis of a match between the landmarks (A, B) stored in each of the two portions (11, 21), and wherein the similarity of the compared portion (11, 21) is expressed in the form of a similarity value derived therefrom, wherein the similarity value is calculated as an F1 score as a score for the match, wherein a similarity between the portion of the first map and the corresponding portion in the second map is determined on the basis of a match between the landmarks (A, B) stored in each of the two portions (11, 21), and wherein the similarity of the compared portion (11, 21) is expressed in the form of a similarity value derived therefrom, wherein the similarity value is calculated as an F1 score as a score for the match, - outputting and/or providing the similarity value to an assistance system of a vehicle, which, on the basis of the similarity value provided, makes a statement about the quality of the first map and/or the second map and decides whether precise navigation and/or automated driving is possible or not; - finding landmarks (A, B) in the mutually corresponding portions (11, 21) of the first and the second map (10, 20), - calculating an accuracy ("precision") as the ratio of the number of landmarks (A, B) in the portion of the second map that can be assigned to a landmark (A, B) in the first map, to the number of landmarks (A, B) in the portion of the second map, - calculating a hit rate ("recall") as the ratio of the number of landmarks (A, B) in the portion of the first map that can be assigned to a landmark (A, B) in the second map, to the number of landmarks (A, B) in the portion of the first map, - calculating the F1 score according to the formula: F 1 = 2 * precision * recall / precision + recall.