Adding point events by intersection offset

适用于 Location Referencing 许可。

Intersection offset

Characteristics of a route can be represented as a point event offset from an intersection. The reference offset data is translated to routes and measures for storage. As shown in the example below, imagine the route has start and end measure values of 0 and 10 miles, respectively. The event shown in the figure can be located at a distance of 2 miles from the intersection on the left or at a distance of 8 miles from the intersection on the right. Since the direction of calibration of the route is from left to right, the offset distance is calculated in the reverse direction (from right to left). Hence, the offset distance in the second case is shown with a negative number. Alternatively, the start measure could have been located by an offset distance of 6 miles from the intersection on the left.

1. 打开 ArcGIS Event Editor 并在出现提示时登录到您的 ArcGIS 组织。
2. 单击编辑选项卡。
3. In the Edit Events group, click the Point Events button .

   The Add Point Events widget appears.

   

   If there are no editable point event layers, the widget is disabled.

4. 单击事件图层下拉箭头，然后选择要编辑的事件图层。
5. 单击网络下拉箭头并选择将用作为新事件提供测量值的来源的网络。
   • 该微件接受 LRS 网络作为源来识别添加新点事件的位置。 但是，当新的点事件数据存储在数据库中时，应用程序会执行测量值的内部转换，以始终将测量值存储在事件注册的 LRS 网络的线性参考方法 (LRM) 中。
   • 网络值可以是已发布的 LRS 网络图层。
6. In the Location section, click the Method drop-down arrow and choose Intersection Offset (Intersection layer name with the offset suffix).

   

   All the intersection point layers that are published with the map service and are registered with the chosen network show up in the drop-down list.

7. Choose the Location of the intersection using any one of these options:
   • Type the intersection name in the Location text box.
   • Click the Select a Location on the Map tool and choose an intersection point feature that participates in the layer selected for offsetting on the map.
   • Click the Location drop-down arrow and choose an intersection.

   Only intersections that are part of the chosen route can be selected.

8. Provide the Offset value for the reference offset using any one of these options:
   • Choose the direction of the offset by clicking the Direction drop-down arrow, typing the offset value, and choosing the units.
   • Type the value and select the units.
   • Click the Select an Offset Location on the Map tool and pick a location along the route on the map.

   A red x is placed at the offset location along the route on the map. This is the location of the Measure value for the event.

   注：

   • This value denotes the distance between the intersection and the proposed measure on the selected route.
   • The direction is an optional selection.
   • If no direction is selected, a positive offset value will place the measure location along the direction of calibration from the selected point feature.
   • If no direction is selected, a negative offset value will place the measure location opposite the direction of calibration from the selected point feature.
   • The new event will be associated with the route (route name) from the LRS Network that the event location intersects. In cases where the input location intersection may have more than one route in the registered LRS Network (overlapping routes), a dialog box prompts you to choose which route you prefer to associate with the event.
   • If you type the Measure value, you can select the unit for that value using the drop-down arrow. The Measure value will be converted into the LRS units before saving the newly added events. For example, the LRS is in miles and you have entered 528 feet as the Measure value. The newly added events will have a Measure value of 0.1 miles because 528 feet equals 0.1 miles.

9. 按如下步骤选择事件的开始日期：
   • 在开始日期文本框中键入开始日期。
   • 单击开始日期下拉菜单，然后选择开始日期。
   • 选中使用路径开始日期复选框。

   开始日期默认为今天的日期，也可以使用日期选择器选择不同的日期。

   注：

   如果将 Event Editor 实例配置为不允许输入路径开始日期之前的日期，那么当您在开始日期中提供所选路径开始日期之前的日期时，将出现一条警告消息，提醒您选择一个位于所选路径开始日期当天或之后的日期。

10. 按如下步骤选择事件的结束日期：
    • 在结束日期文本框中键入结束日期。
    • 单击结束日期下拉菜单，然后选择结束日期。
    • 选中使用路径结束日期复选框。

    结束日期是可选的，如果未提供，则事件在现在和将来都仍然有效。

11. 默认情况下，防止测量值不在路径上复选框处于选中状态。

    防止测量不在路径上 - 此数据验证选项可确保开始和结束测量的输入测量值落在所选路径上测量值的最小和最大范围内。

12. Click Next to view the Attribute-Value table. This table contains all the attributes of the event layer. Fill out all the attribute information for the new event in this table. Check the Show network name check box to see which LRS Network is associated with the selected event layer.

    

    提示：

    可以单击复制属性值按钮 并单击地图上属于同一事件图层的现有点事件以从该点复制事件属性。

13. 单击保存。

    新添加的点事件保存后，将在右下角显示一条确认消息。 新的点图层将创建并出现在地图中。

成功创建点事件后，您有以下两个选项来继续表征路径：

• 单击新建编辑以清除微件中的所有输入条目并将默认值从地理数据库恢复到表。
• 单击下一编辑可以保留微件和属性集中的所有现有条目，以便于快速编辑相似的特征。