はじめに¶

この章では, QGISにおいて強力な地理的分析環境でネイティブかつサードパーティのアルゴリズムを呼びだして使われるQGISプロセッシングフレームワークについて紹介します.これを使うとあなたは空間分析をより生産的に簡単に行うことができます.

以降のセクションではこのフレームワークのグラフィカルなツールをどのように使うのかを説明してそれぞれのツールを最大限に活用します。

There are four basic elements in the framework GUI, which are used to run algorithms for different purposes. Choosing one tool or another will depend on the kind of analysis that is to be performed and the particular characteristics of each user and project. All of them (except for the batch processing interface, which is called from the toolbox or the algorithm execution dialog, as we will see) can be accessed from the Processing menu item. (You will see more than four entries. The remaining ones are not used to execute algorithms and will be explained later in this chapter).

• The Toolbox. The main element of the GUI, it is used to execute a single algorithm or run a batch process based on that algorithm.

プロセッシングツールボックス

• The Graphical modeler. Several algorithms can be combined graphically using the modeler to define a workflow, creating a single process that involves several subprocesses.

プロセッシングモデラー

• The History manager. All actions performed using any of the aforementioned elements are stored in a history file and can be later easily reproduced using the history manager.

プロセッシング履歴

• The Batch processing interface. This interface allows you to execute batch processes and automate the execution of a single algorithm on multiple datasets.

バッチプロセッシングインターフェイス

以下のセクションではそれぞれの要素の詳細を紹介します.