Advanced Tasks : Editing map features : Snapping a newly added feature to a selected feature
  
Snapping a newly added feature to a selected feature
In this procedure, you add a point or line feature to the map and select a feature to which you want the new feature to snap. You also specify a snap tolerance, which is a radial distance around the new feature. The feature you want to snap the newly added feature to must be all or in part within this distance.
1. To open the Tools pane, from the command bar, select .
2. From the Tools pane, select Editing. The Editing window appears.
3. Select the Snapping tab.
Figure 205 
4. From the Select Layer drop-down list, select the layer containing features you want to snap new features to.
5. In Type, Edge is selected by default, meaning the new feature will be snapped to the closest segment of the feature that is within the tolerance buffer indicated in Tolerance. See explanations for the Type options below.
Table 18 
Option
Description
Example
Edge
The new feature you add is snapped to the closest part of the selected snap feature.
The crosshairs cursor indicates where a new feature is about to be added. The selected snap feature is highlighted in red. The red square icon is the point to which the new feature will be snapped. It is the closest point in the selected feature.
Vertex
The new feature you add is snapped to the end of the closest segment of the selected snap feature.
The crosshairs cursor indicates where a new feature is about to be added. The selected snap feature is highlighted in red. The red square icon is the point to which the new feature will be snapped. It is the closest end of the selected feature.
Node
The new feature you add is snapped to the closest intersection of two selected snap features.
The crosshairs cursor indicates where a new feature is about to be added. The selected snap features are highlighted in red. The red square icon is the point to which the new feature will be snapped. The snap point occurs at the closest intersection of the selected snap features.
6. In Tolerance, specify a number of units of radial distance that is added as a snapping buffer around the feature you will add to the map.
• The feature you add to the map is snapped to the closest selected snap feature found all or in part within this tolerance buffer. By default this is a number of pixels. You have the option of selecting Meters as the unit of measure in the drop-down below.
7. Select and then draw a rectangle over a feature to select it. The selected feature is the feature where your newly added feature will snap to. To clear the selection, select .
8. Select the Snap option. If you haven’t performed step 7, you are prompted to select one or more features to which you want the new feature to be snapped.
9. Select the Editing tab.
10. From Edit Layer, select the layer where you want to add the new feature.
11. Select the tool applicable for the feature you want to add and have snapped.
• If creating a line, such as a new road, click the Add Line icon .
• If creating a point, such as a newly-planted tree, click the Add Point icon .
• If creating a polyline, such as a road with several turns, click the Polyline icon .
12. To add the first vertex on the map, click at a location within the snapping distance from the feature to which you want the newly added feature to snap.
13. To complete the feature, double-click on the map.
After you have added the new feature, the Attribute Editor window opens.
14. If required, edit any of the available editable fields.
15. Click Update.
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