SeaGIS Pty Ltd TransectMeasure page

TransectMeasure - single image biological analysis tool

TransectMeasure is a program used for the analysis of percentage cover and measurement of lengths and areas from digital imagery. It is widely used for the analysis of transects or biological sampling from images.

The program supports a variety of still and movie image formats (including a movie player) and allows the user to perform the following measuring functions:

Overlay grid or random dot patterns and interactively assign up to 8 attributes to each dot. Dot patterns can be constrained to fall within a user-defined polygon within the image (typically this is a quadrat).

Make scaled length and area measurements. TransectMeasure supports several calibration models using either quadrats or known lengths to allow scaled measurement of lengths and areas. It uses a projective transformation for quadrat calibrations, accurately modelling oblique imagery. The length of complex objects can be easily measured using a series of points. Area measurements are based on user-defined polygons.

The software allows the user to load a predefined file of attributes and allows attributes to be defined in a dependant and/or hierarchical manner. Point, length and area attributes can be assigned and edited easily with an integrated step, zoom , and measurement history function. In addition to the 8 attributes that can be assigned to point, length and area measurements, TransectMeasure has 12 user configurable information fields. These information fields are usually set up to record general survey information (depth, location, observer details, and so on).

All results for point, length and area measurements can be exported to individual text files, suitable for importing to spreadsheet or database software for further analysis.

TransectMeasure also produces a point count report that can automatically collate point measurements across multiple measurement files.

This software package comes with Movie to JPEG Conversion.

Screen capture from TransectMeasure.