1. Chris Hughes SMS/GIS Project
Safety SMS/LRS Project Temporality and Historical LRS/GIS is managed in Oracle and GeoMedia
Chris Hughes SMS/GIS Project

2. Agenda / Overview
Presentation Goal: to provide a simple overview of the temporal data concepts and how they are managed in GeoMedia/Oracle
Main Agenda Items
LRS concepts
Temporality
Building Milepost LRM
Event Data
Demos
Questions

3. NDOT LRS concepts
Most data within the DOT is collected by linear measure – usually Milepost Index variants
A coordinated GIS and LRS ensure that most (valid) linear referenced data is tied down in space
The SMS GIS project ties multiple linear measurements to multiple map data sets
Maps: SDS (state location data) and CDS (all local roads)
LRS Methods:
SC: entire route - State cumulative Measures
CC: County Cumulative Measures
Addr: partial address measurement system
The kicker: BOTH map and linear data references change over time

4. Temporality Oracle has two products that handle historical data:
Oracle XML database: manage each route as an XML doc and can have multiple versions
Oracle Workspace Manager (OWM): creates multiple tables and views of the LRS and keeps track of all edits
GeoMedia uses OWM
Maintains history of your geometry, routes, and measures
This same data can be used in applications from Nancy and Al

5. Clark Changes

6. Milepost Related Information
GPS Mileposts
LRS Route Cum
MINDX Values
MP6
311,576X
432,522Y
5.923 RC
MP 8
312,000X
432,234Y
8.013RC
MP 12
314,000X
432,240Y
12.117RC
MP17
320,123X
434,789Y
16.981RC
20.29 RC
5.13 RC
9.41 RC
14.55 RC
MP 6.0
5.91 MI RC
MP 8.0
8.12 MI RC
MP17.0
17.02 MI RC
MP 12.0
11.78 MI RC

7. Building Milepost LRM
Goal: To provide a spatial reference to milepost panels to assist in spatially locating any information which is referenced to the panels in the field.
Used the work from Jerry and Lawrie and Location and tied the internal milepost index measures (with equations) to SDS locations
Created continuous measures (linear LRM) from the internal Milepost data
Secured the data so that we can generate revisions and historical snapshots of the data

8. Event Data Any information that has:
Route Master Id
(valid) Milepost index measures
Effective date
Can be spatially located on the SDS (SRN) or CDS and combined with any other data
Examples:
Crash Data
Alias Names (referenced by MilePost, Intersection, RouteCum etc)

9. Presentation and Questions