Williams-Stackhouse Incorporated
Providing Photogrammetric Mapping Services Since 1960
  Williams-Stackhouse Incorporated (WSI) has been providing photogrammetric mapping and related services for 46 years (since 1960). Its clientele include a variety of government and commercial organizations and it has long been known for its dedication to high-quality products and professional standards. Services offered by the company include the following:
  • Precision Aerial Photography with Airborne GPS
  • Photogrammetric Control Surveys
  • Digital Planimetric and Topographic Mapping
  • Digital Terrain Models
  • Cross Sections and Volumetric Calculations
  • Image Scanning
  • Digital Orthophotography
  • GIS/LIS Services


WSI employs a full-time staff of 18, which includes highly trained management and technical personnel with background and experience in virtually every phase of the mapping profession. The company's main office and production facility are located in an industrial park area adjacent to the San Antonio International Airport. The building, which is company-owned, is a two-story brick structure containing 9,000 square feet of workspace with a complete photogrammetric production facility. The building also contains a 200 square foot Department of Defense approved, fireproof vault for storing classified materials as well as aerial film negatives and back-up digital files. In recent years, WSI has made a major commitment to developing and maintaining state-of-the-art digital mapping and GIS capability, which includes seven photogrammetric compilation instruments (four Zeiss first order analytical stereoplotters, two Leica softcopy photogrammetric workstations, and one Boeing/Autometric softcopy photogrammetric workstation) and a Leica DSW300 precision photogrammetric scanner. The company is also equipped with and has expertise in most mapping and GIS software including ArcView, ArcInfo, MicroStation, MetaMAP, and AutoCAD. WSI is also active in industry-related societies and for many years has been a corporate member of both the American Society of Photogrammetry and Remote Sensing (ASPRS) and the Management Association for Private Photogrammetric Surveyors (MAPPS). In December, 2000 WSI was acquired by The Sanborn Map Company, Inc., which has multiple offices throughout the U.S. Shortly thereafter, the company began operating under the Sanborn name and continued to do so until October, 2004. At that time the office was re-acquired by an ownership group that included Randall L. Holt, the company's president of 16 years, and the name was changed back to Williams-Stackhouse Incorporated. The key personnel and management staff remained the same throughout this transition. In its 46 year history, WSI has never been involved in litigation and has never been involved in a legal issue related to its work, business practices, or any other matter. It should also be noted that the company has never defaulted on a project nor has it ever had a claim on its professional liability insurance.