Abstract: The computer automated system and method of converting an image file of a scanned source document, bearing alphanumeric text relating to the lengths and directions of the bounding lines of an area surveyed, into a mathematically accurate vector computer drawing file based on that alphanumeric text. The digitized image file is imported into an existing CAD system having a COGO subroutine and using an OCR operating within the CAD system. The alphanumeric text relating to the lengths and directions of the bounding lines of an area surveyed is recognized by the OCR and then converted by the COGO subroutine into mathematically accurate vectors which can be used for producing accurate drawings. The recognition and conversion steps are such that anyone familiar with software of CAD, OCR, and COGO systems can provide a suitable subroutine to enable a user to employ the method. Hard copy survey maps and legal descriptions may be converted into accurate computer based drawings.