Many factors can affect value. The following are some of those
factors. As a rule the more of these important qualities possessed by
the map the greater its value.
1. Region Depicted. There are more collectors of maps of some
regions than others, affecting the size of the market and thus the
value of maps of those areas. For instance, world maps have a universal
appeal. Among nations there are sizable numbers of collectors for maps
of the United States, Great Britain, Germany, Australia and Canada and
increasingly Japan and China. Within the United States some of the
larger states such as Texas, California and Florida have a lot of
interest but the earliest maps of any state or region would be in
demand. Some areas that have small populations but that are vacation
destinations such as Bermuda, Malta and some of the islands of the West
Indies are popular. Areas that are more remote or with smaller less
affluent populations have less demand and are often very decorative and
2. Historical importance. Some maps, particularly those of
explorers, are the earliest to depict an area or feature. Other maps
might depict an important battle or similar event. Other examples may
be imagined geography such as California as an island. Generally the
closer such maps date to the event the more importance and thus value
3. Size. Generally the larger the map the more opportunity for
detail and decoration. Such maps also display well so they are usually
more valuable than smaller maps of the same area or event. Some maps
are very large and difficult to display, reducing their value.
4. Rarity. Some maps were issued in small numbers and are relatively
rare. If other conditions that enhance value, are present the map is
further enhanced by rarity, but rarity alone does not create value.
5. Age. For similar maps the older is generally the most valuable
but age alone does not determine value as some very early maps of
regions of relatively little interest have relatively little value.
Age, like rarity, is more an enhancement of value.
6. Aesthetic qualities. Some early maps were enhanced with large
cartouches, sea monsters , ships and other decorative additions. Such
maps display well and thus have greater value. Colour and condition
also affect value.