Selecting features by z-values (Defense Mapping)

Cette rubrique s'applique uniquement à ArcGIS for Desktop Standard et ArcGIS for Desktop Advanced.

When interacting with a map, you may want to select features based on elevation. The Select By Z Value tool allows you to query data layers using z-values, then select features based on them.

For instance, suppose you want to see how many bridges have an elevation of 100. You could create a new selection set and choose BridgeL as the selectable layer, then only features with a z-value of 100 would be selected in the map.

Etapes :

1. Start ArcMap.
2. On the main menu, click Customize > Toolbars > Defense Mapping.
3. Click the Select By Z Value button on the Defense Mapping toolbar.

   The Select By Z Value dialog box appears.
4. Check the Only show selectable layers in this list check box if you want only selectable layers to display in the the following layer(s) list.
5. Click the I want to drop-down list and choose one of the following options:
   • Select features from—This option allows you to select features from the layers checked in the the following layer(s) list.
   • Add to the currently selected features in—This option allows you to add to the features selected in the layers checked in the the following layer(s) list.
   • Remove from the currently selected features in—This option allows you to remove features from the currently selected features in the layers checked in the the following layer(s) list.
   • Select from the currently selected features in—This option allows you to select features from the currently selected features in the layers checked in the the following layer(s) list.
6. In the the following layer(s) list, check the check boxes next to the layers you want to use for the selection set.
7. Click the that have Z values drop-down arrow and choose one of the following options:
   • Equal to—Selects features whose z-values are equal to what is specified in the Z value(s) of text box.
   • Not equal to—Selects features whose z-value are not equal to what is specified in the Z value(s) of text box.
   • Greater than—Selects features whose z-values are greater than what is specified in the Z value(s) of text box.
   • Greater than or equal to—Selects features whose z-values are greater than or equal to what is specified in the Z value(s) of text box.
   • Less than—Selects features whose z-values are less than what is specified in the Z value(s) of text box.
   • Less than or equal to—Selects features whose z-values are less than or equal to what is specified in the Z value(s) of text box.
   • Within—Choosing this option causes two Z value(s) of text boxes to appear for you to define minimum and maximum z-values. This option then selects features with z-values that are within the two z-values defined in the text boxes.
   • Equal to or within—Choosing this option causes two Z value(s) of text boxes to appear for you to define minimum and maximum z-values. This option then selects features with z-values that are within or equal to the two z-values defined in the text boxes.
8. Type a z-value in the Z value(s) of text box.
9. Click OK.