This chapter explains the general use of the Geographic Determination Library function set and how to incorporate these functions into your application. To assist in learning, a simple program using the Geographic Determination Library functions is shown at the end of this chapter.
Within the library, all the public functions begin with gdl, such as gdlOpenSpatialFile. Where possible, you should avoid using variables, constants, or macros beginning with gdl or pip. See the include file in the directory for the development environment you are using for a complete list of visible symbols.