Sounding data (water depths) for Ellis Fjord in the Vestfold Hills

Brief description

This data set contains depth sounding data (water depths) for Ellis Fjord, one of the fjords of the Vestfold Hills. The data were collected between 1994 and 1999.

See the links in the related links section for copies of maps (PDF and TIFF) of Ellis Fjord soundings, sounding transects and bathymetric contours.

Map 15623: Ellis Fjord, Vestfold Hills - Depth Soundings
Map 15624: Ellis Fjord, Vestfold Hills - Sounding transects
Map 15625: Ellis Fjord, Vestfold Hills - Sounding transects overlaying topography
Map 15626: Ellis Fjord, Vestfold Hills - Transect coordinates and ground control
Map 15627: Ellis Fjord, Vestfold Hills - Bathymetric Contours

Lineage

Progress Code: completed

Statement: The data set was derived from a hardcopy map, which involved three main processes. These were:

1, The hardcopy map was scanned and saved as a TIF image.

2, The image of the hardcopy map was geo-referenced using Microstation and a similarity transformation. The image was fitted to the Vestfold Hills shoreline data using a visual best-fit approach. Using the geo-referenced image, the spot height points were digitised.

3, The sounding data were then imported into the Arc/Info coverage format and structured to conform with the Australian Antarctic Division's Spatial Data Model. This spatial data model has since been superseded by the SCAR Feature Catalogue (refer to link below) and the attribute data have been reformatted accordingly. Using the geo-referenced image the points were tagged with their respective heights.

Each sounding feature has the DQI number 185. Use this DQI number to search for the Quality Information Record about the features (refer to link below). Enter the DQI number as the Qinfo id and start the search. The information includes the original hard copy map name and the estimated accuracy of the data.