Generating elevation points from contours

Elevation points are often used to represent the highest and lowest points within a contour line. With the Create Elevation Point from Contour tool, you can generate elevation points that represent the highest point or lowest point on a contour, or both. The point features are created in the selected point layer. The height values are generated based on the elevation values from an underlying digital elevation model (DEM).

When you choose to create both the highest and lowest points on the contour, two point features are created, at the highest and lowest points in the contour, respectively.

The layer you choose as the spot elevation point layer must contain a field for storing the elevation value. By default, this field is set to be the ZV2 field. You can use the Contour Field Name Options tool to change the elevation field name.

Étapes :

1. Start ArcMap.
   Conseil :

   If the ArcMap - Getting Started dialog box appears, you can open a new or existing map document. You can also check the Do not show this dialog box in the future check box and click Open.

2. Load an elevation point layer and contours in the map.
3. On the main menu, click Customize > Toolbars > Production Editing.
4. On the main menu, click Customize > Toolbars > Production Contouring.
5. Click the Production Start Editing button on the Production Editing toolbar.
   Remarque :

   The Manage Features and Create Attributes, Update Attributes, or Metadata Attributes windows automatically appear when you start an edit session using the Production Start Editing tool.

   Conseil :

   If the Create Attributes, Update Attributes, or Metadata Attributes window does not appear when you start an edit session, click the Link Feature Manager To Attributes Window button on the Manage Features window.

6. Select the contour for which you want to generate spot heights.
7. Click the Create Elevation Point from Contour button on the Production Contouring toolbar.

   The Create Top Spot Tool dialog box appears with the Generate Highest Spot Height check box checked.

   When the Generate Highest Spot Height check box is checked, a point is created that represents the highest point on the selected contour; this is the default.
8. If necessary, check the Generate Lowest Spot Height check box.

   When the Generate Lowest Spot Height check box is checked, a point is created that represents the lowest point on the contour.

9. Click the Choose Spot Height Layer (point) drop-down arrow and choose the feature class that contains the spot heights.
10. Click Apply.

    The Generate Spot Heights message appears when the process is finished.

11. Click OK.

Conseil :

You must have contours with regular intervals for this tool to work properly.