The difference between the north geographic pole and the north magnetic pole is called magnetic declination, or just declination. This is an important factor to take into consideration when using a map and a compass. Depending on where you are on the earth, the angle of declination will be different. From some locations, the geographic and magnetic poles are aligned and declination is minimal, but from other spots, the angle between the two poles is fairly large.In areas with significant declination, adjustments must be made to walk a correct bearing. Information concerning magnetic declination is found on the topographic map.The declination itself changes just a little, each year. This means using an old map could point in a direction several degrees wrong, and it is crucial to find accurate information for your location.