Maps / Digital Mapping / Cartography Expert Witnesses

Barbara Blades-Lines is a Certified Appraiser of Personal Property (CAPP) as awarded by the International Society of Appraisers (ISA). She provides extensive Appraisal Valuation services on fine art property, antiques, and residential contents for the following purposes: estate, equitable distribution, divorce settlement, probate, expert witness testimony, insurance or insurance damage claims.

Ms. Blades-Lines has over 25 years of professional experience and education in appraisal methodology. She is qualified to execute appraisals that are USPAP compliant and meet IRS requirements.

Experience: Ms. Blades-Lines has appraised collections for the Masterworks Museum of Bermuda Art, Marriott Bermuda, the Bank of Butterfield, Norton Rose Fulbright, Peter Paul Petroleum, the University of Houston, and she has worked closely with the Bermuda National Gallery’s collections of furniture, European paintings, and the Bacardi Biennial.

Projects have included services for clients in Bermuda and all over the United States, primarily in Texas but also California, Massachusetts, Kentucky, New Mexico, Maine, Seattle and New York. Select public institutions that have received her appraisals include, the White House and the Smithsonian, Washington D.C.; Museum of Fine Arts Houston, Contemporary Art Museum, and many more.

As a generalist appraiser, she has a broad background in appraising:

Colonial Furniture Contemporary Furniture Decorative Art Fine Art Collectibles Residential Contents

Silver Glass Ceramics Maps Paintings Public Art / Art Education

Litigation Support:  Ms. Blades-Lines' provides correct valuation for the settlements of disputes, including divorce, claims, loss, negligence, or fraud. Her experience with legal projects, were over Fine Art Property, relating to divorce, the appraisal value for a collection, and the authorship of an artist.

Education / Training: A native Houstonian, Barbara graduated from the University of Texas and completed postgraduate studies with Christie’s Education in London. Pursuing a career as an independent appraiser, Barbara founded Blades Appraisal Services, in 1994, Houston, Texas.

David G. Koger is a Remote Sensing Image Analysis expert with over 40 years of experience in the field. He configured and operates a state-of-the-art remote sensing image analysis and geographic information system and consults on various remote sensing applications.  Background Experience - Mr. Koger was an early researcher and developer of Satellite Data Applications. He installed analog and digital image analysis workstations and trained users in defense, major oil, and academia in Panama, Ecuador, Chile, Australia, Germany, France, Italy, Africa and the U.S. His clients include the Department of Energy, National Cancer Institute, American Farm Bureau, broadcast journalism, law firms, and several hundred oil and gas explorationists.

In 2007, Mr. Koger conducted a study to map regional geomorphic features for all of Nebraska. Since that time, ten earthquakes of 3.0 and above on the Richter scale have coincided with features mapped. Using Digital Airborne Platforms, he has studied huge areas around the globe.  

In his unique line of work, Mr. Koger has performed forensics film analysis, searched for Noah's Ark, and analyzed images of the Shroud of Turin and the underwater video that found the Titanic.  

Litigation Support - Mr. Koger offers Forensic Digital Image Analysis of remotely sensed, aerial photo (digital or film), and underwater video. His services include forensics, time-series studies, and documentation of surface damages, wildfires, material movements. Expert witness strategies and research methodologies are available to attorneys representing plaintiff and defendant. 

Remote Sensing Environmental Activity and History Superfund / Industrial Damage Underwater Video Surface Damages Hazardous Waste Wildfire Origin / Wildfire Movement Erosion / Soil Loss Land Access and Boundary Disputes

Basement Fault Mapping Earthquake Prediction and Evaluation Landslide Prediction and Evaluation Photogrammetry Airphoto Image Analysis (Digital, Scanner, Film) Time-Series Habitat Mapping Oil / Gas / Mineral / Water Exploration Buried Treasure / Submerged Treasure

View David G. Koger's Consulting Profile.

Petru Corporation is a full service land consulting company offering a full line of Title, Natural Resources, and Land services.

Incorporated in 1986, Petru serves the needs of the title, title insurance, oil, gas, mineral, geothermal, wind, solar, mining, environmental, and right-of-way industries; legal, engineering, subdivision, developers, and land planning professions; government; lending and trust institutions; water purveyors; utilities; real estate companies; and the individual and business communities.

Petru Corporation and Tim Truwe were featured on Enterprises TV, aired on Fox Business Network and were published in Black Gold in California, the story of the California Petroleum Industry and also in The Business Elite, Corporate America.

Consulting Services:

Title Consulting Title Searching Title Examining Title Reports Title Engineering Title Insurance Plot Descriptions and Easements Map Drafting and Map Review Property Inspections Right of Way/Easements Water Rights

Leasehold Estates Oil, Gas, Mineral and Mining Consulting Subdivision Map Act Negotiate Oil and Gas Leases Regulatory Consulting Permitting/Regulatory Title Insurance Underwriting Support Title Insurance Claims Due Diligence Acquisitions and Divestitures Mining Claims

Timothy B. Truwe, President and Chief Financial Officer of Petru Corporation, is a Registered Professional Landman (#23542) and a Registered Environmental Property Assessor (#569045). He specializes in Title, Natural Resources and Land Matters issues and offers a full line of title, and land services.

Background - Mr. Truwe started his career in 1973 in the title, resource, and regulatory industries. His career includes employment and training at Ticor Title Insurance Company (now Chicago Title Co.) as Title Searcher, Title Officer, and Title Engineer. He also worked at Ogle Petroleum Inc., as Assistant Land Manager in the Land/Legal Department. His responsibilities at Ogle included both onshore and offshore assets and the technical and administrative oversight of several thousand parcels of land and leases in excess of one million acres.