A system for creating as-built or measured drawings is described herein. The invention allows an operator to collect a set of data at a job-site, in such a manner that individual components of the job-site are linked relative to one another and to use that data to create accurate measured drawings that reflect the structure and content layout of the site. A knowledge based system is used to parse the data in real-time to produce a visual indication that the data has been recorded correctly. Error minimizing functions are used to ensure data integrity. The data may then be uploaded to a central computer server, for content-checking, authorization, and archival purposes. Since the invention provides an integrated environment for recording data and creating drawings, the need to translate data between systems is minimized, reducing the possibility of errors due to operator mis-keying or mis-interpretation.