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Introduction

There are a few concepts in Geocap which are important to understand in order to work efficiently with the software. The main concepts are Actors, Schemas, Geodetic settingsSettings and different commandsCommands. These concepts will be explained in this section. In addition to this section also talks about toolbars, color tables and keyboard short cuts.

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In display context an actor is a graphical term for a visualization unit. A complex display is created by a set of actors. Actors are shown as child's of datasets and are shown in blue text. In Geocap the basic principle is that a display command creates one or several actors. It is possible to remove the actors and the associated display by right clicking and selecting Delete

Visualizations are called actors

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The Shelf Module contains several schemas. Some of the schemas used in the Shelf Module are coast line, base line, limit line, seabed surface, sediment thickness. You can define the schema of a dataset in the project by right clicking it, and selecting set schema in the pop-up menu. The choice of a dataset´s schema controls which commands you see in the pop-up menu when you right click the dataset. You may create your own schemas as well as edit existing schemas by selecting schemas under edit in the main menu. You can also edit the commands associated with the schemas.

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Commands have two execution modes: Direct and Interactive. If the execution mode is set to Interactive the commands editor with the front menu will be displayed when you execute the command. This allows you to adjust various parameters settings that define how the command works. Depending on the command, the menu will consist of different input parameters settings from simple display parameters settings to complex manipulation options. If the execution mode is set to Direct the command will execute with the last active input parameters settings for the command. It is possible to see the underlying settings for any command by right clicking it in the Toolbox and selecting Edit.Note that some commands does not require input parameters and will therefore display the underlying code when running it in Interactive mode.

All commands have a front end panel, and most of them have settings that may be customized.
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 An example of a command front end panel

Commands can be stored in three categories:

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You will find the commands sorted into the different categories in the Toolbox or on the right-click menu of a dataset or a folder. Commands can also be put together in sequence in Workflows to perform visualizations or data operations.All commands have a front end panel, and most of them have settings that may be customized.
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 An example of a command front end panel

Item commands

An item command is associated with a single dataset or folder in the project. Item commands are stored along with the project. Therefore, if a project is transferred the item commands will transferred as well. Item commands typically contain settings that pertain specifically to the dataset to which it belongs.

Schema Commands
A schema command is stored with a schema. All datasets or folders using the same schema share these commands, which also means that editing these commands will affect all the datasets using this schema. The shared schema commands are listed on the right click menu and in the Toolbox under Schema commands. 

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Shared Commands
Shared Commands are commands which are shared with all datasets and folders. The shared These commands are always available and listed in the Toolbox under Shared commands. 

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Default Commands
The default command is the command that is executed when you tick the box next to a dataset in the project. By default a dataset will have one of the schema commands as a default command. This can however be changed to any command.

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You will learn how to convert datasets to other projectons later in this tutorial.

Color Tables

Geocap comes with a set of predefined color tables which can be seen in the toolbox. These color tables are of course customizable, or you can create your own color table from scratch. By default the color tables shown in the lower right corner of Geocap will be used to display a dataset. You can change these color tables by selecting one of them, right-click another color table in the toolbox and select Activate. You can also use drag and drop to drag a color table tables from the toolbox and drop it onto a displayed dataset in the graphical window.

Sticky Surface

Geocap has a concept where any surface can be set to be sticky. When a surface is sticky, data like points, lines or images may be displayed onto that surface. This is mainly done by re-sampling lines and displaying them a little bit above the sticky surface. When a surface is activated (or set) as a sticky surface, it is copied to workspace under the name sticky_surface. If this dataset is removed from workspace, there is no sticky surface anymore.

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