Editing Line Vectors

This guide follows on from the previous in this section – Create AOI & Clip Data.

OVERVIEW

Once you’ve set the coordinate reference system for your QGIS project and clipped the vectors to your area of interest, there are four more things you should do to make sure they look great in UE4:

1. Make sure that all the line segments are connected properly – if they’re not, your landscape splines won’t connect properly in UE4.
2. Re-project the vector data so it’s in the same coordinate reference system as the project (at the moment it’s just displayed in the project CRS). We need to do this so that the tools we want to use for the segment length modification work in the correct units.
3. Make sure the segment length (spacing between the points of your lines) is appropriate for the type of content you’re seeking to create. If they’re too close, your spline’s segment meshes will be squashed. If they’re too far apart, they won’t blend well with your landscape’s terrain.
4. Make sure they’re Single-Part Linestrings. This sounds complicated but it just means that each line in your vector data is continuous (has one start, and one end). Multi-Part Linestrings (where multiple line segments that aren’t connected can be part of the same vector line feature) are supported by .Shp format, but not by UE4 Landscape Splines, and therefore, they’re not supported by TerraForm.