The Select buttonDropDown allows you to select objects with multiple methods. The Select buttonDropDown appears in two parts: the image part and the text part with a drop-down arrow. You can click the image to directly implement the corresponding action, or the text to select a specific command from list.
Please ensure the layer is selectable if you are going to select objects in the layer. You can select by:
Ctrl+A Select All
When a layer is selectable, and the mouse focuses on the map, you can click Ctrl + A to select all objects in the layer.Click ESC to cancel the selection.
Clicking a point or dragging a box
Click the image part of the Select buttonDropDown to display the drop-down list, click Select.
The mouse pointer turns to
.
- Select by clicking a point: Click a point to select an object in the layout window. The selected object will be unselected if you click to select another object. To select several objects at the same time, you need to hold down the Shift key.
- Select by dragging a box: Hold down the left mouse key and drag a temporary box. The objects whose centroids are within the box will be selected. To select several objects, drag boxes while holding the Shift key.
Dragging a circle
Select objects by dragging a circle. Click the image part of the Select buttonDropDown to display the drop-down list, click Circle. The mouse pointer turns to
.
- Click in the map window to specify the center of the temporary circle. Drag to draw the temporary circle.
- Click again to finish the temporary circle. The objects whose centroids are within the circle will be selected.
- To select several objects at the same time, draw circles while holding the Shift key.
Drawing a polygon
Select objects by drawing a polygon. Click the image part of the Select buttonDropDown to display the drop-down list, click Polygon. The mouse pointer is
.
- Continuously click to draw a temporary polygon and right click to finish. The objects whose centroids are withing the polygon will be selected.
- To select several objects at the same time, draw polygons while holding the Shift key.
Drawing a polyline
Draw a polyline to select objects intersected with the polyline. Click the image part of the Select buttonDropDown to display the drop-down list, click Polyline. The mouse pointer turns to
.
- Continuously click to draw a temporary polyline and right click to finish. The objects intersected with the polyline will be selected.
- To select several objects at the same time, draw polylines while holding the Shift key.
You can mix the methods introduced above to select objects by holding down the Shift key when selecting objects. Multi-layer selection is supported in SuperMap iDesktop.
Selection Mode
In the current map window to select the object operation, support to draw rectangular box, circle and polygon, etc. to choose.
The Selection Mode provides three selection modes: Contain Centroid, Areas Intersect and Contain Object.
- Contain Centroid: When the object’s centroid is included in the temporary rectangle, the object is selected.
- Areas Intersect: The object is selected when there is an intersecting portion between the temporary rectangle and the object.
- Contain Object: When the temporary rectangle contains the object completely, the included object is selected.
To extract the temporary rectangular box to select the object as an example, the interpretation of the three object selection mode as shown below. The dotted rectangle in the figure represents a temporary rectangle, and the polygon represents a geometric object.
Figure: Select Mode Diagram
Tolerance
Tolerance is mainly used to control the accuracy of the selected object, that is, in the selection of objects, by setting a tolerance value, when the cursor and the map object distance is less than the value (in pixels). The object is selected. The user can enter the tolerance value directly in the text box.
Interaction of selecting of multiple objects
When you select many objects at the same time, right click on the map window, and if you hover your mouse over “Select Objects(Top 20)”, you can view the first 20 of all selected objects and layers where these objects are located in. You can choose any object from the list as needed, and the system will highlight it in the map.