The most common such chart is the birth chart. This shows the positions of the planets in the sky on the day of birth and in which zodiac sign they are sitting at that time.
This gives it a large degree of personalisation. How can it be otherwise since it relies upon information as to the date and place of birth of the recipient? Read about birth charts at Wikipedia.
Example of chart included with beaded astrology necklace
One such chart is shown here. The positions of the planets are marked and the planets are named. In addition the 12 signs of the zodiac can also be seen and it is possible to tell which zodiac sign each planet is visiting and the relative positions of the planets to one another.
Since the relationships between planets and their relative positions change constantly, the astrological map changes too. This constant movement makes the chart for any given day different from others. Geographical location also has an influence on the positions shown by the chart.