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QGIS GUI

When QGIS starts, you are presented with the GUI as shown below (the numbers 1 through 5 in yellow ovals refer to the six major areas of the interface as discussed below):

Figure QGIS GUI 1:

../../../_images/startup.png

QGIS GUI with Alaska sample data nix

ノート

ウィンドウの装飾（タイトルバーとか）は利用している オペレーティングシステムやウィンドウマネージャによって見かけが異なります.

QGISのGUIは5つの領域に分割されています:

  1. メニューバー

  2. ツールバー

  3. 地図凡例

  4. 地図ビュー

  5. ステータスバー

これらの5つのQGISインターフェースについては次のセクションで 詳しく説明します.さらに2つのセクションでキーボードショートカットとコンテキストヘルプについて解説します.

ツールバー

ツールバーではメニューのほとんどと同じ機能を提供している上に対話的に地図を操作する機能を提供しています.ツールバーのそれぞれのアイテムではポップアップヘルプが提供されています.マウスでアイテムの上を動かすとツールの簡単な説明が表示されます.

Every menubar can be moved around according to your needs. Additionally every menubar can be switched off using your right mouse button context menu holding the mouse over the toolbars (read also パネルとツールバー).

ちなみに

ツールバーの復元

If you have accidentally hidden all your toolbars, you can get them back by choosing menu option Settings ‣ Toolbars ‣. If a toolbar disappears under Windows, which seems to be a problem in QGIS from time to time, you have to remove \HKEY_CURRENT_USER\Software\QuantumGIS\qgis\UI\state in the registry. When you restart QGIS, the key is written again with the default state, and all toolbars are visible again.

地図凡例

The map legend area lists all the layers in the project. The checkbox in each legend entry can be used to show or hide the layer.

レイヤは選択してドラッグで上下に移動することによってZオーダリングを変えることができます.Zオーダリングとは,凡例のリストでの表示順が地図表示のレイヤ表示順になることです.

Layers in the legend window can be organised into groups. There are two ways to do so:

  1. Right click in the legend window and choose Add Group. Type in a name for the group and press Enter. Now click on an existing layer and drag it onto the group.
  2. Select some layers, right click in the legend window and choose Group Selected. The selected layers will automatically be placed in a new group.

To bring a layer out of a group you can drag it out, or right click on it and choose Make to toplevel item. Groups can be nested inside other groups.

グループ用チェックボックスを使うとクループ内全レイヤの表示,非表示を1回のクリックで行えます.

The content of the right mouse button context menu depends on whether the selected legend item is a raster or a vector layer. For GRASS vector layers mActionToggleEditing Toggle editing is not available. See section Digitizing and editing a GRASS vector layer for information on editing GRASS vector layers.

ラスタレイヤ選択時のマウス右ボタンメニュー

  • Zoom to layer extent
  • Zoom to best scale (100 %)
  • Show in overview
  • Remove
  • Set Layer CRS
  • Set Project CRS from Layer

  • プロパティ

  • Rename
  • Copy Style
  • Add New Group
  • Expand all
  • Collapse all
  • Update Drawing Order

Additionally, according to layer position and selection

  • Make to toplevel item
  • Group Selected

ベクタレイヤ選択時のマウス右ボタンメニュー

  • Zoom to layer extent
  • Show in overview
  • Remove
  • Set Layer CRS
  • Set Project CRS from Layer
  • Open attribute table
  • Toggle editing (not available for GRASS layers)
  • Save as
  • Save selection as
  • Query
  • Show Feature Count

  • プロパティ

  • Rename
  • Copy Style
  • Add New Group
  • Expand all
  • Collapse all
  • Update Drawing Order

Additionally, according to layer position and selection

  • Make to toplevel item
  • Group Selected

レイヤグループ用マウス右ボタンメニュー

  • Zoom to group
  • Remove
  • Set group CRS
  • Rename
  • Add New Group
  • Expand all
  • Collapse all
  • Update Drawing Order

It is possible to select more than one layer or group at the same time by holding down the Ctrl key while selecting the layers with the left mouse button. You can then move all selected layers to a new group at the same time.

You are also able to delete more than one Layer or Group at once by selecting several Layers with the Ctrl key and pressing Ctrl+D afterwards. This way all selected Layers or groups will be removed from the layerlist.

Working with the Legend independent layer order

Since QGIS 1.8 there is a widget that allows to define a legend independent drawing order. You can activate it in the menu Settings ‣ Panels. Determine the drawing order of the layers in the map view here. Doing so makes it possible to order your layers in order of importance, for example, but to still display them in the correct order (see figure_layer_order). Checking the checkbox control rendering order box underneath the list of layers will cause a revert to default behavior.

Figure Layer Order:

../../../_images/layer_order.png

Define a legend independent layer order nix

地図ビュー

This is the “business end” of QGIS - maps are displayed in this area! The map displayed in this window will depend on the vector and raster layers you have chosen to load (see sections that follow for more information on how to load layers). The map view can be panned (shifting the focus of the map display to another region) and zoomed in and out. Various other operations can be performed on the map as described in the toolbar description above. The map view and the legend are tightly bound to each other - the maps in view reflect changes you make in the legend area.

ちなみに

マウスホィールを使って地図をズームします

You can use the mouse wheel to zoom in and out on the map. Place the mouse cursor inside the map area and roll the wheel forward (away from you) to zoom in and backwards (towards you) to zoom out. The mouse cursor position is the center where the zoom occurs. You can customize the behavior of the mouse wheel zoom using the Map tools tab under the Settings ‣ Options menu.

ちなみに

矢印キーとスペースバーを使った地図パンニング

矢印を使って地図のパンを行えます.マウスカーソルを地図内に置いて右矢印キーを押すと東にパンします. 左矢印を押すと西にパンします.上矢印キーを押すと北へパンします。下矢印を押すと南にパンします。 またスペースバーをパンに利用できます:スペースバーを押したままでマウスを動かすと地図をパンできます.

ステータスバー

ステータスバーにはマウスポインターがマップビュー内を移動した時の位置の地図座標 （たとえばメートルか度数）が表示されます.座標表示の左側は小さいボタンになって いてマウスの位置座標の表示かマップビューの拡大、縮小した場合の現在の四隅の座標 表示を行うかの切り替えを行います.

Next to the coordinate display you find the scale display. It shows the scale of the map view. If you zoom in or out QGIS shows you the current scale. Since QGIS 1.8 there is a scale selector which allows you to choose between predefined scales from 1:500 until 1:1000000.

ステータスバーの中にあるプログレスバーには各レイヤをマップビューに描画する処理の進行状況が表示されます. ラスタレイヤで統計処理をするような場合プログレスバーは非常に長い処理の進行状態を 表示することになります.

If a new plugin or a plugin update is available, you will see a message at the far right of the status bar. On the right side of the status bar is a small checkbox which can be used to temporarily prevent layers being rendered to the map view (see Section レンダリング below). The icon mIconStopRendering immediately stops the current map rendering process.

To the right of the render functions you find the EPSG code of the current project CRS and a projector icon. Clicking on this opens the projection properties for the current project.

ちなみに

マップキャンバスにおける正しい縮尺を計算する

When you start QGIS, degrees is the default unit, and it tells QGIS that any coordinate in your layer is in degrees. To get correct scale values, you can either change this to meter manually in the General tab under Settings ‣ Project Properties or you can select a project Coordinate Reference System (CRS) clicking on the mIconProjectionDisabled CRS status icon in the lower right-hand corner of the statusbar. In the last case, the units are set to what the project projection specifies, e.g. ‘+units=m’.