According to the company, the APIs provided with the SDK implement functions such as:
- Zooming in and out
- Shifting a map in any direction
- Passing search criteria directly from an application
- Routing from any two specified points


TeleType's WorldNav software (left) and menu from the SDK (right)
In addition, TeleType says it offers map conversion tools and utilities for developers who want to implement their own maps on Windows CE-based portable navigation devices. The tools are said to allow the popular ESRI shape file formatted maps to be converted into the company's TTM (TeleType Map) format.
The TeleType GPS SDK (with API) is at $495. The company notes that use of the SDK requires the presence of its WorldNav GPS software, priced at $5,000 for an OEM (original equipment manufacturer) version. Both are said to be available now.
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