Overview of Low-Cost Map Digitizing Systems.

摘要

The information that is placed into computer map files may come from many sources. Increasingly, the data is processed directly from surveys and other observations. For example, with relatively minimal processing, LANDSAT data can be input into a raster database as a separate map overlay. However, most data currently requires substantial human interaction to create the necessary map information. While the direct input, or capture, of observational data for cartographic data bases is an area of focused research and development, the majority of data capture processing involves the input of already existing maps and photographs into computer form, i.e., digitizing. The purpose of this document is to provide an overview of the current market for low-cost digitizing systems. No recommendations are made for selection of a particular vendor; however, four packages are highlighted as meeting the minimal requirements for extracting map data to provide base maps for a small emergency response system. Other vendors of similar products that could, with somewhat more difficulty, be adapted to the stated requirements are included. This document is composed of four sections including: (1) a discussion of the basic terminology of digitizing systems; (2) a description of the minimal requirements for a map digitizing system; (3) short discussions of the most appropriate packages based on literature received; (4) copies of portions of the literature sent by the various vendors. This document is intended to function as an introduction into this market area for those who are unfamiliar with the digital mapping field. (ERA citation 14:010586)