Querying Maps > Selecting Features

Selection Options

"Selection Options" window contains three parts:

Set Selectable Layers: all layers in the map will be displayed in the panel. A check before the layer name means the layer can be selected; otherwise, you cannot select features on that layer. You can click "Select All" or "Clear All" button to set selectable layers, and also you can check or cancel layer by layer.

Selection Mode: there are three options including "Select features partially or completely within the rectangle", "Select features completely within the rectangle", and "Select features that the rectangle is completely within." These options can be cooperated with "Selection Mode" in the "Selection" menu.

3.	Tolerance: This number indicates the distance within which features are selected when you use selection tools. The smaller the number is, the more precise the selection would be. The default is 3 pixels and you can type a number as your tolerance.

Since the selections cooperated with different selection methods will results in different selection results, the following section is going to introduce the selections resulted from "New Selection", "Append Selection", "Select from Current Selection" which are cooperated with "Selection modes."

“New Selection” with “Select features partially or completely within the rectangle”

If you choose “New Selection” and “Select features partially or completely within the rectangle”, you can click "Select Features" tool to drag a rectangle. And the features intersecting the rectangle will be selected.

“New Selection” with “Select features completely within the rectangle”

If you choose “New Selection” and “Select features completely within the rectangle”, you can click "Select Features" tool to drag a rectangle. The features completely within the rectangle will be selected.

“New Selection” with “Select features that the rectangle is completely within”

If you choose “New selection” and “Select features that the rectangle is completely within”, you can click "Select Features" tool and drag a rectangle. The features completely containing the rectangle will be selected.

“Append Selection” with “Select features partially or completely within the rectangle”

If you choose “Append Selection” and “Select features partially or completely within the rectangle”, you can click "Select Features" tool and drag a rectangle. The features intersecting the rectangle will be selected. The previously selected features are still selected, too.

“Remove from current selection” with “Select features partially or completely within the rectangle”

If you choose the two modes, you can click "Select Features" tool and drag a rectangle to cover the selected features you want to clear. The selected features intersecting the rectangle will be cleared.

“Select from current selection” with “Select features partially or completely within the rectangle”

If you choose the two modes, you can click "Select Features" tool to drag a rectangle to cover the selected features you would like to keep them selected. The features intersecting the rectangle will be kept selected.