Page Comparison

Preferred Format

Specifications

Level

Bathymetry

L3

Priority 1

32-bit floating point GeoTIFF (.tiff)

BAG single-resolution

Priority 2

BAG multi-resolution, LAS/LAZ

Bathymetry and Backscatter

Vertical datums: Ellipsoid and MSL

Resolution as per Table 3

Variable: coordinates, depth (m neg value) or intensity (dB), density (sounding/cell), uncertainty, flag (bathymetry in GeoTIFF format requires three separate files: depth, density, uncertainty

Coordinate system: Geographic WGS84 or GDA2020

Precision: Metric variables with minimum of 2 decimals, Angular variables deg with 6 decimals

Navigation and Ancillaries

Date and Time: Calendar and UTC or specify otherwise.

Coordinate system: Geographic WGS84 or GDA2020 with an ellipsoid height datum.