Instructions for use

In real life, the network may not be fully connected. If you need to determine which points or arc segments are connected and which points or arc segments are not connected, you can use the Adjacent Element Analysis or Connectivity Element Analysis function. The most important feature of network connectivity analysis is that it does not need to consider the network resistance (neither the turning weight nor the Forbid to Pass), and the elements in the network only have the difference of connectivity and non-connectivity.

Connectivity Analysis Settings

Connectivity Analysis Parameters need to be set before connectivity analysis. Parameters to be set include:

• Find Direction: Relates to the direction of the arc segments in the network. The results of the analysis will vary depending on the lookup.

  Forward: Find forward along the direction of the arc segment in the network.

  Backward: Backward along the direction of the arc segment in the network.

  Both: Search along the two directions of the arc segment in the network, that is, forward and backward.

• Search level: when performing connectivity analysis, the number of search arcs can be understood as the depth of the network. The arc segment (or node) directly connected with the event point is the first-level access edge (access point). The arc segment (node) directly connected with the first-level node along the analysis direction is the second-level access edge (access point). By analogy, we can also get all the access edges (access points) of the third and fourth levels. When the number of steps connected to the event point exceeds the set parameter, the search will not be continued. In the Adjacent Element Analysis, the search level is 1, that is, only the elements adjacent to the event point are searched. In Connectivity Element Analysis, you can find multiple levels. The default number of levels to find is 2.

Connectivity analysis provided by SuperMap Application mainly includes the following functions: