Labeling points in a post map overlaid on a 3D surface map using the screen as the label plane requires the use of a 3D wireframe map. A 3D wireframe map can display post map labels using the Screen plane (as pictured below), but the 3D surface map cannot. What you can do is overlay the post map with a 3D wireframe map (not surface), and then position the wireframe overlay to be on top of the 3D surface map, and turn off the visibility of the wireframe.
Label a post map with the screen orientation by overlaying it on an invisible 3D wireframe map instead of the 3D surface map.
To do this, please follow these steps:
- Click Home | New Map | 3D Surface | Surface, select your grid file, and click Open to create the desired 3D surface map.
- Click Home | New Map | 3D Surface | Wireframe. Choose the same grid file you used for the 3D surface map in step 1, and click Open.
- Add a post map to label the map containing the 3D Wireframe:
- In the Contents window, click the Map object containing the 3D Wireframe layer.
- Click Home | Add to Map | Layer | Post, select the data file containing x,y locations and the labels, and click Open.
- Position the maps:
- If necessary, in the Contents window, click and drag to order the maps so that the map containing the 3D Wireframe layer is above the map containing the 3D Surface layer.
- Press and hold CTRL on the keyboard, and click both Map objects to select them.
- In the Properties window, click the View tab. Click the Projection drop down menu, and choose the desired projection.
- Use the Layout | Arrange | Align | Center command to align the plots horizontally.
- Use the Layout | Arrange | Align | Middle command to align the plots vertically.
- In the Contents window, for the map with the 3D Wireframe layer in it, uncheck the boxes for the 3D Wireframe layer and each of the 5 axes.
- In the Contents window, click the Post layer to select it.
- In the Properties window, click the Labels tab.
- In the Label Set 1 section, click the Worksheet column drop down menu and select the column containing your desired labels.
- In the General section, click the drop down menu for Label plane, and choose Screen.
Attached is a Surfer file (3D Surface Labels.srf) with this example.
Updated October 25, 2017