The term file format refers to the logical structure used to store information in a GIS file. File formats are important in part because not every GIS software package supports all formats. Almost every GIS has its own internal file format. These formats are designed for optimal use inside the software and are often proprietary. They are not designed for use outside their native systems.
Most systems also support transfer file formats.
Transfer formats are designed to bring data in and out of the GIS software, so they are usually standardized and well documented. If your data needs are simple, your main concern will be with the internal format your GIS software supports. If you have complex data needs, you will want to learn about a wider range of transfer formats, especially if you want to mix data from different sources. Transfer formats will be required to import some data sets into your software. Back to Top Vector Formats Many GIS applications are based on vector technology, so vector formats are the most common.