1. A method comprising: receiving probe data from a first period of time, wherein the probe data from a first period of time is from a plurality of probes within a predefined geographic region; generating a first image of the predefined geographic region based on the probe data from the first period of time, wherein generating the first image based on the probe data from the first period of time comprises determining a number of probe data points corresponding to a pixel and presenting the pixel in a first hue in response to the number of probe data points satisfying a predefined threshold, and presenting the pixel in a second hue in response to the number of probe data points failing to satisfy the predefined threshold; receiving probe data from a second period of time different from the first period of time, wherein the probe data from the second period of time is from a plurality of probes within the predefined geographic region; generating a second image of the predefined geographic region based on the probe data from the second period of time; comparing the first image to the second image; and generating a revised route geometry based on changes detected between the first image and the second image.