GEOmatx (jee-oh-mat-iks) – a company specializing in the acquisition, modeling, analysis, and management of data identified with respect to its geographic location. Including, but not limited to: (1) land and hydrographic surveying; (2) boundary determination; (3) environmental, resource and asset mapping; and, (4) field data collection for GIS.

Professional Surveying & Mapping Services

GEOmatx, LLC, provides surveying and mapping services throughout Baltimore, Maryland and the mid-Atlantic region. We are an emerging small business, registered with the Federal SAM/CCR database and the State of Maryland.  Through the use of proven and cutting-edge measurement and mapping systems, we are committed to providing accurate and reliable surveying services. Project deliverables are prepared using CAD and GIS-compatible systems in accordance with your project's particular technical and software requirements.

Founded in 2008 and drawing from over 35 years of experience, we work closely with our clients to plan and perform each survey in a manner consistent with their project needs, budgets and time schedules. A progressive and innovative company, we were among the early supporters of the offshore wind farm initiative in Maryland. 

GEOmatx offers our clients a full range of surveying services. Our depth of knowledge, our commitment to service, and the innovative solutions we develop in response to project challenges distinguishes us from other companies and has earned us a reputation of excellence among our clients and business associates. Your satisfaction is vital to our continued success – more than 90 percent of our work comes from repeat clients. We take pride in each and every assignment.  We look forward to adding your name to our list of satisfied clients.

GEOmatx service area

Map ©1992 and available from Raven Maps & Images

GEOmatx offers a wide variety of Surveying and Mapping Services including:

• Single Beam, Multi-beam and Side Scan Surveys
• Port and Channel Condition Surveys
• Pre- and Post-dredge Surveys
• Marina and Harbor Condition Surveys
• Lake and Reservoir Sedimentation Surveys
• FAA 1A and 2C Certifications
• New Tower Site Surveys

• Tower As-Built Surveys
• Boundary Surveys and Plats
• Expert Witness Testimony
• American Land Title Surveys (ALTA)
• Topographic Mapping
• Engineering Design Surveys
• GIS Asset and Resource Mapping


"The client is the focus of every project."
Thomas “Tom” L. McElroy


Our Firm

GEOmatx is owned and managed by Thomas L. McElroy, a licensed Professional Surveyor in the states of Maryland, Virginia, and Kansas.  Mr. McElroy has over thirty-five years of experience on projects throughout the United States and internationally as both a direct contractor and sub-contractor. His clients have included:

Clients have included:

Federal Agencies

• Architect of the Capitol
• Federal Emergency Management Agency
• National Park Service
• US Army Corps of Engineers
• US Coast Guard
• US Environmental Protection Agency
• US Fish & Wildlife Service

State and Local Agencies

• MD Division of Natural Resources
• Maryland Environmental Services
• MD State Highway Administration
• Washington Metro and Transit Authority
• Washington Suburban Sanitary Commission
• Maryland National Capital Park & Planning

Large Private Sector

• Bechtel Corporation
• Boeing Military Aircraft Company
• GenOn/NRG Energy
• Halliburton NUS
• Waste Management Inc.



Contact Us

If you wish to discuss your project’s needs and requirements, please email us at or call us at (443)562-7136.  We look forward to providing you with surveying and mapping services and solutions.


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GEOmatx - Surveying and Mapping Services

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