CUBIZEN: Global GIS, CityEngine & Creative Tech Masterclass

Today, we will cover how to place points at desired intervals along a line segment. This feature is particularly useful for setting up sampling points at regular intervals along road or river centerlines.

First, draw an Area and a Line on the main screen.

[img 1 : Drawing Area and Line features in Global Mapper]

The first method we'll discuss is not adding points at a specific distance interval, but rather adding a specific number of points at equal intervals.

After selecting both objects:

[img 2 : Selecting Advanced Feature Creation Options - Create Point Features Spaced Along Selected Feature(s)]

Select Advanced Feature Creation Options - Create Point Features Spaced Along Selected Feature(s).

A window for setting the sample spacing will appear.

[img 3 : Sample Spacing Setup window for Fixed Number of Locations]

• Sample Count: Sets how many points to distribute at equal intervals along the line segments of the currently selected objects.
• Start Label Number: Enter the number to start the numbering.
• Prefix / Suffix: Enter any characters to be added before or after the number.

Click OK.

Next, specify the layer where the points will be added.

[img 4 : Modify Feature Info window for specifying the Point Layer]

Once you click OK:

[img 5 : Result showing 20 points placed at equal intervals]

As you can see, a total of 20 points have been placed at equal intervals.

Next, let's try placing points based on a fixed distance interval.

Select both objects again and choose Create Point Features Spaced Along Selected Feature(s).

[img 6 : Sample Spacing Setup window for Fixed Distance Interval]

• Spacing distance: Places points at the specific distance interval you enter.
• Name Points Sequentially Instead of by Distance: Assigns point names sequentially. If unchecked, the distance value will be entered as the name.
• Keep Endpoint Even If Not at Distance Multiple: Maintains the endpoint even if it doesn't fall exactly on a distance multiple.
• Don't Add New Vertex within Spacing of Endpoint: Prevents creating an extra point if it's too close to the endpoint.

After clicking OK and specifying the layer:

[img 7 : Result showing points added at 100m intervals]

Points are added at 100m intervals. It's quite simple, isn't it?

I will briefly explain the remaining options. Feel free to try them out yourself.

[img 8 : Additional options in the Sample Spacing Setup window]

• Sample Features at Endpoints Only: Adds points only at the start and end points.
• Sample Features at Single Fixed Distance: Adds a single point at a specific distance from the start point.
• Keep All Original Vertices: Also adds points at the existing vertices of the line segment.
• Sample Along 3D Length of Line if Possible: If the vertices of the line segment have elevation values, the distance is calculated considering the 3D length.

That's it for today!