DELILAH Survey Data: Comparison Plots

Comparisons of consecutive daily surveys during DELILAH

The DELILAH survey data were collected using the Coastal Research Amphibious Buggy or CRAB, a 10-m tall self-propelled tripod. Position of the CRAB was determined using a Geotronics 140T auto-tracking total station. This system aims an infrared beam at a reflecting prism mounted on the CRAB and measures the spherical coordinates associated with each position. The Geodimeter 140T tracks the CRAB and samples at 1Hz. There were errors associated with the Geodimeter (vertical noise and drifting) which are described in the Survey Section.

The cross-section data are displayed as comparison plots between successive surveys of all lines surveyed. The comparison plots are available in two different file types, Graphics Interchange Format (GIF files) and Computer Graphics Metafiles (CGM files). The gif files can be viewed using an Internet browser. The cgm files are vector based and supported by most CAD, word processing, and drawing programs. The files are named by date (YYMMDD) according to the second day of the comparison. For example, the file containing the comparison plot between surveys on October 10 and October 11, 1990 is labeled DE901011.GIF (.CGM). The data file used for these plots is DELILAH.2d described under DELILAH Survey Data: 2d Format.

An example plot is shown below:

To access the cross-shore comparison plots

Back to Top

DELILAH Home | Overview | Surveys | Video | Sediment | Calibrations | Instruments | Sled | People & Reports | Data | Report