Preparing a Patchworks road network

A two step process is usually used to create a road network model. The first step involves preprocessing the spatial data files that describe the existing and candidate future road segments across the forest, as well as a point data set that identifies the locations of the destinations. This section will describe some of the procedures that need to be taken. The second step involves extracting and matching coordinate information from the prepared spatial files and generating the core road network files in the required Patchworks file formats. This can often be done with the build road matrix tool as described in the next section.

Existing and candidate future spatial road network data must be combined in to a single spatial layer that provides road coverage to all managed polygons. This often involves some of the following steps:

  1. Simplification of existing road data sets that contain clutter.

  2. Addition of candidate future roads in areas that have not previously been developed, or where access development is ongoing.

  3. Adding segments to represent intermodal bulk transport and other non-roads.

  4. Densification by adding nodes in to long uninterrupted road segments.

  5. Node snapping to digitally connect road segment end points that share a common location, and optionally adding node labels to the road segments.

  6. Assigning attribute and cost information to road segments

The destination spatial layer requires a point for each destination feature. Preprocessing of the destination spatial file includes

  1. Adding a point location for each destination at the correct location.

  2. Ensuring that the road network connects to the destination.

  3. Adding attribute information to the destination features.

These preprocessing steps are custom to the inputs that you have available and the model that you are building. You should use the GIS tools that you are familiar with to prepare these input files.