Mission Task Profile Examples

If the user seeks specific survey results tailored to different objectives, we recommend considering the following Lawnmower Survey examples: Sparse Lawnmower, Dense Lawnmower, Super Dense Lawnmower and Transect Survey. Each example is designed to address distinct survey requirements and offers optimised settings to achieve the desired outcomes.

Sparse Lawnmower Survey

If the user's goal is to conduct reconnaissance and gather bathymetric data without image overlap, the Sparse Lawnmower variant is ideal. With a focus on high-altitude operation and capturing distinct images, this variant enables detailed bathymetry observation for in-depth analysis and mapping.

Setting	Value
Name	Sparse Lawnmower
Path Generation
Lawnmower Orientation	0 - 360°
Coverage
Type	Image (Fixed Distance)
Overlap Lateral	50%
Mow Width	10.0 m
Distance	1.0 m
Capture
Pitch	0°
Vertical	Mode Bottom Altitude Value 4.00 m

Dense Lawnmower Pattern

The Dense Lawnmower pattern is designed to achieve high-resolution mapping objectives. It is employed when there is a reasonably accurate understanding of the bathymetry in the survey area. The pattern incorporates a minimum of 20% image overlap to ensure comprehensive coverage of the seabed and capture detailed data for mapping purposes.

Setting	Value
Name	Dense Lawnmower
Path Generation
Lawnmower Orientation	0° - 360°
Coverage
Type	Image (Camera Coverage)
Overlap Forward	30%
Overlap Lateral	50%
Capture
Pitch	0°
Vertical	Mode Bottom Altitude / Surface Depth / Geodetic Height Value Bottom Altitude 0.5 - 8 m Surface Depth 0 - 300 m Geodetic Height - to +

Super Dense Lawnmower Pattern

The Super Dense Lawnmower pattern is specifically designed for achieving precise 3D photogrammetry reconstruction. It is employed when the objective is to capture an extensive level of detail in a known location. The pattern incorporates a 50-80% overlap of images and involves multiple super dense surveys conducted at different orientations to ensure comprehensive coverage and capture the necessary detail for reconstruction. In certain cases where photogrammetry is intended to be performed on the resulting imagery, it is advised to repeat the same lawnmower pattern at a 90 degree rotation to the first lawnmower task to ensure adequate feature definition.

Assistance from contour information can enhance the accuracy and effectiveness of the pattern. For information on uploading of contour information files or seabed infrastructure files see Mapping Enhancements.

Setting	Value
Name	Super Dense Lawnmower
Path Generation
Lawnmower Orientation	0° - 360°
Coverage
Type	Image (Camera Coverage)
Overlap Forward	50%
Overlap Lateral	80%
Capture
Pitch	0°
Vertical	Mode Bottom Altitude / Surface Depth / Geodetic Height Value Bottom Altitude 0.5 - 8 m Surface Depth 0 - 300 m Geodetic Height - to +

Transect Survey

The Transect Survey is used to survey a designated route. This mission profile is useful tasks such as assessing the state of a pipeline or sampling environmental diversity along a line.

Setting	Value
Name	Transect Survey
Path Generation
Lawnmower Orientation	0
Coverage
Type	Image (Camera Coverage)
Overlap Forward	80%
Capture
Vertical	Mode Bottom Altitude / Surface Depth / Geodetic Height Value Bottom Altitude 0.5 - 8 m Surface Depth 0 - 300 m Geodetic Height - to +

Wall Survey

The Wall Survey is used to assess the state of a vertical wall. If using Hydrus with a tether line, ensure you continuously manage the slack in the tethered line. Too little slack and the the Hydrus won't be able to reach the extent of the survey area. Too much slack, and the tether has potential to get tangled.