GIS view
What it does
The GIS view shows the network on real geography. It is the same network that you drew in the SLD editor. There is one model with two views:
- The schematic view. Use it when a clear diagram is important.
- The geographic view. Use it when distance is important.
The geographic view answers questions that a schematic cannot answer:
- What is the real length of this feeder?
- Does the route cross the river two times?
- Which pole is nearest to the fault that the study found?
- Is the new connection nearer to the 11 kV feeder or to the 33 kV feeder?
How to use it
- Give the elements coordinates. Use latitude and longitude in WGS 84. You can enter the values directly, import them from a GeoJSON file, or click the position on the map.
- Route the lines. A line route is a polyline: an ordered list of vertices. It is not a straight line between the two ends. Phasor calculates the route length from the vertices. An accurate route gives an accurate length, and an accurate length gives an accurate impedance.
- Compare the route length with the electrical length. The electrical length is the value that the impedance calculation uses. If the two lengths disagree, find the cause before you use the results in a report.
- Show the results on the map. Voltage and loading color the map. The color scale is the same as on the diagram. You can compare the two views directly.
- Export for field work. Export the network and the results as GeoJSON. Handheld devices and the systems of the network operator can read this format.
Inputs and outputs
Inputs
| Input | Notes |
|---|---|
| Element coordinates | Latitude and longitude in WGS 84. |
| Line routes | An ordered list of vertices. Phasor calculates the length from them. |
| Imported geometry | GeoJSON features. Phasor matches them to elements by name or by attribute. |
| Basemap | The tile source that you configure. Phasor keeps a local copy of the tiles. |
Outputs
| Output | Notes |
|---|---|
| Route lengths | The geodesic distance along the routed polyline. |
| Geographic result view | The same color scale as the diagram. |
| GeoJSON export | The elements and the results, as features. |
| Length discrepancies | Each line where the routed length and the electrical length disagree. |
Notes
Coordinates are optional. An element without a location is still a full part of the model. It does not appear on the map, and nothing else changes. You can add geography only to the part of the network where it is important. The rest can stay schematic.
The route length and the electrical length are two separate values. This is intentional. For example, the route can come from a drawing, and the impedance can come from an as-built length. Phasor keeps both values. Phasor flags a disagreement. Phasor does not select one value silently.
Line kilometers come from the route
When a line has a routed polyline, each section length is the distance between two vertices. If you also keep a separate table of sections, select one source as the correct one for the project. Then use that source everywhere.