1. Pacific Island GIS & RS User Conference
USP Japan ICT Auditorium, Suva Fiji Islands
Pacific Island GIS & RS User Conference
28 Nov – 1 Dec 2016

2. Tracing linear networks
Ken Mathers – Senior Consultant
Nov 2016

3. Visitor to Fiji since 1994

4. Agenda Linear Networks Introduction Architecture Tracing Networks
Types of trace
Trace results
Trace Post reporting
Batch Tracing

5. Linear networks

6. Defining linear networks
There are many linear networks
Road networks
River networks
Electrical networks
Gas and Water networks

7. Different trace logic can be applied
Linear logic
Directional
Non directional
Point to Point
Shortest Path
Lowest Cost
Distance based

8. Different trace logic can be applied
Trace logic similar to data flow but not quite.
One input
Decisions involve
Stop at item
Include item in result
Produce result based on current record

9. Trace Results The results of a trace include
A graphical display (optional)
ID of every traced item
Upstream source
Sequence at current step
Depth (number of steps through the trace)

10. Creating Linear Paths Use Geometry to identify relationships
Store results in Open Tabular format

11. Tracing Linear Paths Interactive traces Batch Traces
Post Processes on results
Store results in Tabular form

12. Trace and Reporting Separate the reporting from the trace
Allow many reports from one trace
Allow reporting of related data
Allow summary reports
Traces
Reports

13. Demonstration