Build a Network Dataset

The Network Data model is used to store data models with Network Topology. The Network Data model contains the network line data and the network junction Point Dataset, as well as the Topology between the two. In the Network Dataset, the Line Dataset is the primary Dataset, and the Point Dataset is the child Dataset.

Based on the Network Data model, various Network Analyses such as path analysis, Service Area Analysis, Find Nearest Facility, Location-Allocation, and accessibility analysis can be performed. The creation of Network Data is the basis of the entire Network Analysis, and all Network Analysis functions can be performed on the network layer. SuperMap provides a Build Topology Network method to generate Network Dataset.

Before Building Network data, you need to do the following preparations:

  1. Prepare Dataset for Build Network Data
    • Prepare the data for the Build Network data. Data Types that can be used to Build Network data include Point Dataset, Line Dataset, and Network Dataset. The point data is optional. If the point data is not selected, the Network Dataset can also be constructed. When the Network Dataset is constructed, it is equivalent to reconstructing the Network Data by using other point and line data.
  2. Get ready to Network DatasetSelect Fields.
    • Ensure that the line data used to construct the network includes fields that represent network resistance, such as time and distance information. In reality, the Weight Field will be different because of different directions, so you need to provide a Weight Field for each direction. For example, F _ T _ TIME can be used to represent the elapsed time of the arc segment from the Start Node to the End Node, and T _ F _ TIME can be used to represent the elapsed time from the End Node to the Start Node.
    • During path analysis, if text information of Driving Guidance needs to be generated, please ensure that the line data used for network construction contains the fields of required indication information (such as Road Name and Site Name).
  • Build Network Dataset: Please refer to the Build Topology Network page for

    detailed operation.

  • Edit Network Dataset:

    Network Dataset supports edit operations. After editing a Network Dataset, a new Network Dataset can be generated through the Build Topology Network. For the editing operation of Network Dataset, please refer to the Object Operation page.

Precautions

  1. During the execution of Network Analysis, if the Network Dataset is edited in the map, ContinueNetwork Analysis will still perform analysis based on the Network Data before editing. The edited Network Dataset will not be loaded automatically. You need to manually re-open the Network Dataset in the map.
  2. If a Network Dataset is accidentally destroyed and you are prompted with a Errors on network edges "when performing Network Analysis, use the Build Topology Network" feature on the Data tab. Add the Network Dataset with errors to reconstruct the network.