GIS Graphic Files

Product Description: Thomas Bros. Maps GIS (geographic information system) Graphics Files are available in California, Oregon, and Washington. These GIS Graphics files are copies of the files used to publish the Thomas Guides. GIS Graphics Files include digital representations of points, lines, and areas. Thomas Bros. Maps GIS files are organized into layers, which provide maximum flexibility and utility. Please refer to the appropriate Thomas Guide to see which map features are in a given database. Many of our map files were created using high-accuracy photogrammetric engineering methods. GIS Graphics Files are offered in four components so that customers can obtain just the right data for their needs.

Street Centerlines: Street centerline graphics come with basic attribute data such as street classification (freeway, highway, ramp, etc.), surface (paved, unpaved), structure (on grade, overpass, tunnel, etc.), status (open, closed, restricted access, proposed), and street name.

Street Name Annotation: Thomas Bros. Maps is the only digital street file provider to offer street name annotation placed by skilled cartographers. This is the same street name annotation published in the Thomas Guide.

Street Addresses: Street addresses are stored as ranges on each street segment (from-left, to-left, from-right, to-right). Thomas Bros. Maps has developed extensive quality checks to insure the highest accuracy street addresses. Custom address services are also available.

Other Layers: Thomas Bros. Maps offers the most complete and extensive map layers in graphics form. These layers include: city areas, county/state/national areas, ZIP Code areas, Census Tract areas (1980 and 1990 in most areas), building footprints (dams, airport runways, landmark buildings), cultural points (schools, fire stations, hotels, city halls, post offices, etc.), cultural feature lines (docks), ownership areas (parks, golf courses, colleges, cemeteries, federal lands, shopping malls, etc.), township-section-range, ranchos, Thomas Bros. Maps Page and Grid™ , water lines, and water areas. Both graphics and attributes are included.

Terms: Thomas Bros. Maps offers a license to use the GIS Graphics Files, but does not sell the data. Thomas Bros. Maps retains all intellectual property rights to the product. License terms are one year or longer. Upon annual renewal, licensees receive updated versions of the GIS Files. Updates occur with the release of each year's new Thomas Guide. Most Thomas Guides are updated annually.

Formats: The data is in Arc/Info (coverages or export files), DXF, or ASCII format. Data is delivered on 4mm, 8mm, 1/4-inch cartridge, or 9-track tape. Small data sets can be delivered on 3.5", 1.4MB floppy disks. Special handling charges are added for other formats and media.

Note: File specifications subject to change without notice.

BLENDING THE ART OF CARTOGRAPHY WITH THE PRECISION OF DIGITAL MAPPING