Operates coordinate digitizer and optical scanner. Uses digitizing tablets to capture data from various map media. Uses a keyboard to enter associated attributes and auxiliary data files into a geographic information system. Edits graphic files to match design specifications. Collects, codes, prepares, enters and performs quality control screen of tabular and attribute information to be tagged to spatial data layers. Assures the quality of digital map data (e.g., checks digital representation against source data, validates data labels, verifies topology). Identifies and solves problems on a timely basis to keep projects on schedule and in conformance with design specifications. Answers all technical questions on data preparation and coding. Works with entry-level digitizers to produce internal edit plots and hard copy plots.