1.   He also helped start Etak INC., a digital map maker in Menlo Park.

2.   A digital map is essentially a numerical description of these lines and symbols.

3.   Digital maps and related products, such as block diagrams, can be displayed either as images on a graphics terminal or in hard-copy form.

4.   The term DIG-FILE means Device Independent Graphics File, which is a digital map held in a disc file.

5.   The map user can select features of interest from the digital map and display them in a way that is suited to his or her requirements.

6.   Thirdly, digital maps can be combined with other kinds of spatial data in a Geographical Information System.

7.   Digital maps of slope and aspect can be derived from a DEM if a suitable computer program is available.

8.   The Ordnance Survey of Great Britain is also providing a limited amount of digital map data and DEMs.

9.   In this cartographic database will be digital maps of coastlines, hydrography, slope, aspect, settlements, and administrative boundaries.