There are four types of region in Echoview:
You can choose the type when you define a region.
You can change the type of a region at any time using the Region Browser dialog box or the 3D Region Properties dialog box:
Note: 3D Regions are always analysis regions.
An analysis region is used to enclose samples which you plan to analyze.
All regions of this type are analyzed for the following exports:
Analysis regions can be given a region class to allow you to classify the data they enclose. This feature may be used for many purposes including the classification of regions according to species.
A fish track region is used enclose single targets which you plan to analyze as a fish track (that is a the echoes from a single fish).
Fish track regions can be given different region classes to allow you to classify various parts of an echogram or file. This feature may be used to classify different regions for each transducer, for example, or for different species.
All regions of this type are analyzed for Fish Track analyses.
There are rules which constrain the data which fish track regions can enclose. For this reason you must detect or create fish track regions. See About fish track regions for more information.
A bad data region is used to enclose data (of any type) which is to be excluded from analyses. This is a useful way to exclude data that have known problems, such as data affected by bad weather, interference, ghost bottoms or echosounder malfunction.
Note: Data from bad data regions will only be excluded from analyses if the Exclude bad regions option is selected on the Analysis page of the Variable Properties dialog box.
A marker region encloses data for annotation. It is neither a bad data nor analysis region. The annotation can be viewed and edited on the Region browser dialog box.
Marker regions are automatically created for:
Comment String (CS) telegrams read from Simrad Ex500 data files and Annotation datagrams associated with Vertical markers in Simrad Ex60 data files
Marker telegrams read from SonarData EchoListener data files
Event marker tuples read from HAC data files
Note: Uncheck the Create marker regions from data files setting on the Classes page of the EV File Properties dialog box to stop the automatic creation of marker regions. Doing this can improve Echoview's performance when working with these data files.
To make the annotations for marker regions visible, select the Notes for marker regions option under Show in echogram on the Echogram page of the EV File Properties dialog box.
About regions
About region class
Defining and creating regions
Integrating regions