Flowlines

A Flowline is a preconfigured generalisation process which is used to derive a specific type of map through the generalisation of a predefined set of Themes. A Theme is typically a type of geographic feature such as roads, buildings, and rivers.

A Flowline is made up of Subflows, which are executed in sequence. A Subflow is in turn made up of a sequence of Steps which are associated with a single type of data (a Theme). Each Step is a logical generalisation operation that is applied to the relevant features.

Steps and Subflows are reusable components. When creating a new Flowline, you can import Subflows from other Flowlines and modify them. Similarly, existing steps can be imported into a Subflow and modified.

Installing System Flowlines

1Generalise is supplied with a standard system Flowline "1 to 25 000 Map". This can be installed from the 1Generalise Admin user interface.

Note: Some existing profiles may become invalid if system flowlines are upgraded.

Install the System Flowlines

1. Open the 1Generalise Admin UI.

2. Navigate to Admin > Repository Administration.
3. Scroll down to "Install 1Generalise System Flowlines" and click Install System Flowlines Now.

Managing Flowlines

Flowlines are predominantly managed using the 1Generalise Admin UI (see Managing Flowlines in the Admin UI). A Flowline is represented by a folder in the 1Generalise folder in the Actions tab.

A Subflow of a flowline is represented by a sub-folder in the Flowline folder for the respective Flowline.

The 1Generalise UI provides a Flowline editor which can be used to create a new flowline from a copy of an existing flowline (including optionally, all its Subflows and Steps).

Copy a flowline

1. Navigate to the Flowline Editor within the 1Generalise UI.

2. Click in the Flowlines table.

   

3. Enter a Name for your new flowline, then select an existing flowline to copy from the Flowline drop-down menu.

   Check the box if you want to also copy the flowline structure (including Subflows and Steps).

4. Click Create.