A method for correcting deformation of a digital map for a vehicle when the vehicle is moving from a first zone towards a second zone, the method comprising: loading a related part from the digital map, wherein the related part comprises all digital map information relating to a geographical area within a radius of M km from the vehicle; determining whether the related part includes road coordinate information in the first zone and/or road coordinate information in the second zone; if it is determined that the related part only includes road coordinate information in the first zone, directly using road coordinate information in the first zone, wherein the road coordinate information in the first zone is associated with a first Cartesian coordinate system, wherein the vehicle uses the first Cartesian coordinate system to process road coordinate information; if it is determined that the related part includes road coordinate information in the first zone and road coordinate information in the second zone associated with a second Cartesian coordinate system, transforming the road coordinate information in the second zone to the first Cartesian coordinate system, and generating a corrected map by combining the road coordinate information in the first zone and the transformed road coordinate information in the second zone, wherein the vehicle uses the first Cartesian coordinate system to process road coordinate information; and if it is determined that the related part only includes road coordinate information in the second zone, converting back the transformed road coordinate information in the second zone to original road coordinate information, wherein the vehicle transitions to use the second Cartesian coordinate system to process road coordinate information. loading a related part from the digital map, wherein the related part comprises all digital map information relating to a geographical area within a radius of M km from the vehicle; determining whether the related part includes road coordinate information in the first zone and/or road coordinate information in the second zone; if it is determined that the related part only includes road coordinate information in the first zone, directly using road coordinate information in the first zone, wherein the road coordinate information in the first zone is associated with a first Cartesian coordinate system, wherein the vehicle uses the first Cartesian coordinate system to process road coordinate information; if it is determined that the related part includes road coordinate information in the first zone and road coordinate information in the second zone associated with a second Cartesian coordinate system, transforming the road coordinate information in the second zone to the first Cartesian coordinate system, and generating a corrected map by combining the road coordinate information in the first zone and the transformed road coordinate information in the second zone, wherein the vehicle uses the first Cartesian coordinate system to process road coordinate information; and if it is determined that the related part only includes road coordinate information in the second zone, converting back the transformed road coordinate information in the second zone to original road coordinate information, wherein the vehicle transitions to use the second Cartesian coordinate system to process road coordinate information.