Digital
OrthophotographyDigital
Orthophotography
Thinking of
Imagery? Think Tobin! - Lines, dots, symbols and more lines - it all
starts to look the same.
You've got to see it to believe it.
Digital
OrthoMaps® (DOMs)TOBIN off-the-shelf digital orthophotography provides a good way to obtain image data fast. The benefits of using digital technologies to correct and integrate data for more precise mapping is becoming increasingly clear to professionals in many industries. Digital orthophotography and related digital technologies are a cost-effective, timely solution to improving locational accuracy of data, and are used to verify locational relationships, integrate varying data into a common database, and to facilitate efficient survey planning and execution. If your area of interest is not covered, TOBIN offers a custom service.
Digital OrthoMaps® (DOMs)
TOBIN's Digital OrthoMaps®, or DOMs are created by scanning and rectifying aerial photography to eliminate distortions due to the earth's curvature, topographic relief, lens imperfection and flight conditions. During this process, the image is coupled with a Digital Elevation Model resulting in an xyz-coded image. DOMs meet mapping accuracy standards of 1" = 500' (±10 ft). The image data is rigorously tied to photo-identifiable National Geodetic Survey (NGS) ground control utilizing the required number of sub-meter accuracy Global Positioning System (GPS) control points. A Digital Terrain Model (DTM) is generated from ground control or stereo models to properly rectify the DOMs. This process produces a final product with a three-foot pixel resolution and can be generated on the datum and coordinate system requested by the client.
A lower resolution version, or Modified DOMs can be generated which meets a map accuracy standard equivalent to that of a U.S.G.S. 7.5-minute quad sheet (±40 ft), and results in data at six-foot pixel resolution delivered on the datum and coordinated system of choice. Every other frame of image data is scanned and rigorously tied to USGS 7.5 minute topo quad sheets. Modified DOMs work well in areas of flat terrain. In areas of rugged terrain, a DTM may be necessary to eliminate photographic distortion caused by the terrain.
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1985-90 (169k) Scanned Ortho Coverage 1996-97 (151k) Digital Ortho Coverage by County 1996-97 (449k) Digital Ortho Coverage by Quad |
Digital Ortho Quarter Quads
(DOQQs)
TOBIN has developed over 1,200 1-meter resolution Digital Ortho Quarter Quads (DOQQs) in conjunction with the U.S.G.S.'s project to develop high-resolution orthophotography for key metropolitan and sensitive areas.
Scanned Orthophotography
The orthophotography flown in the '80's and early '90's which was used to develop SuperBase™ is available as scanned and georeferenced images. These low-cost images provide valuable backdrop to the SuperBase™ vector data products as visual verification that surveys, wells, etc., have been correctly located, and to identify features not included in the vector data.
SCALE: 3' & 6' - Pixel Resolution
DATE: 1982 to Current
SOURCE:
COVERAGE: