2. MSAG Conversion Service
Bob Gojanovich, ENP
Jim Shepard, ENP

3. What is MCS?
Provides a convenient way to provide data to, or get data from, a legacy system that still uses MSAG data.
This web service provides conversion between PIDF-LO and MSAG/ALI data.
For a given PIDF-LO, what is its MSAG equivalent?
For an MSAG-valid address, what is it PIDF-LO equivalent (GIS centric)?

4. Why do we need it?
Nearly every MSAG has some variations from the original NENA data standards in how fields are used.
Because of this variation, the MCS needs a complete set of fields for each “MSAG record” and a link between the MSAG record and street/address point records in the ECRF/LVF.
Some MSAGs have content in address numbers, and address number suffixes that would not match that in the ECRF/LVF site/structure layer.

5. Where It Fits
LNG
LPG
Civic
PIDF-LO
PIDF-LO
ALI Civic
MCS
MCS

6. How is it provisioned?
Provisioned using layer replication from the master Spatial Interface.
The layers include all of the layers to create a PIDF, plus any layers needed to construct the MSAG for the local jurisdiction.
These would typically include an MSAG Community Name
Often includes the County ID
For many jurisdictions where prefix/suffix and/or directionals are included in the Street Name would include a Street Name layer.
Where the content of the MSAG is the same (for all addresses in the jurisdiction) as the equivalent PIDF-LO field, the layer need not be present. (What are the odds of that?)

7. No, really, how is it provisioned?
GIS Road Center Lines (RCL) and Address Points (AP) differ from MSAG street segments since they come from two different sources for, generally, two different purposes.
Scenario 1:
GIS RCL = 1 – 100, CR 123, Dimebox, TX
MSAG = 1 – 100, Middle Creek Rd., Lee County, TX
Scenario 2:
GIS AP (with no corresponding RCL) = 50 CR 123, Dimebox, TX
Use or non-use of county codes, etc.
GIS may use FIPS (e.g., Harris County = 201)
MSAG may use literal (e.g., Harris County = HARS)

8. GIS Layer (Appendix B)

9. Other issues
Dispatchable Address: MSAG lacks “floor #”, “room #”, etc.
Transitional Use of ESNs
How do you know where / when you need maintenance on the MCS layer?
How do you ensure consistency in responses across vendor platforms?
Who will pay for it? The NG Authority? Legacy Authority? State?