Thurston County Fairgrounds Jason Guthrie 3607042735 JasonGuthrietcomm911org Basics 911 Call Where in the world Send responders 911 Call ANI Coordinates ECRF Spatial call routing uses the calling device location to route to the correct PSAP sector based routing may sti ID: 935388
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Slide1
GIS for NG911
May 18
th
, 2022
Thurston County Fairgrounds
Jason Guthrie 360-704-2735
Jason.Guthrie@tcomm911.org
Slide2Basics
911 Call / Where in the world? / Send responders.
Slide3911 Call
ANI
Coordinates
ECRF: Spatial call routing uses the calling device location to route to the correct PSAP. (sector based routing may still be used.)PSAP Polygons cover the state without gaps or overlaps
Slide4Where in the world?
Traditional phones have a civic address (ALI) associated
Cell phones provide latitude and longitude. Handset or tower sector.
Address points are critical to converting to a dispatchable civic address.Cellular over WIFI. Associate civic address with WIFI connection.
VoIP phones have ALI as well as a VoIP Positioning Center (VPC)
Slide5Send Responders
Fire/Law/EMS polygons cover the state without gaps or overlaps
Where the incident is located drives who should be sent.
Agency and units. (e.g.E31 or tenders)CAD picks units based on GIS data and documents the call.
Agency and perhaps station may be recommended on call handling equipment (CHE) at call setup.Where are they going. Map it!How do I get there. Route it!
Slide6Essential GIS Layers
Address Points
Where exactly is the incident occurring? Civic address from latitude and longitude.
Need to be as comprehensive as possible.
Road CenterlinesHow do I get there from here? More detail the better (driveways?) Connectivity is important.Emergency Service Boundaries: PSAP, Fire, Law, EMSContext: Lakes, streams, railroad, communities, common places, gates, parcels, imagery, parks, schools, state/federal land, etc.
Slide7Where does the information come from?
Addressing authorities. (Database, email, PDF, etc.)
Communication and coordination is key
Feedback on proposed addresses PSAP mapping
Documentation of address assignments and changesFeedback from first responders, GIS user, general publicCalling Service Providers (CSPs)
Slide8GIS Data Flow
Local authoritative mapping
Data exported and uploaded to GeoComm
NENA GIS Data Model StandardComtech Spatial MSAG
CSP ALI validation (LVF)ECRFQuality Control checks at every stage!
Slide9Questions?
If you need clarification, others probably do too.
Slide10Why are address points important?
Reverse Geocoding
Location Validation
Addressing Clarity
Call HistoryPrecise Response Recommendation
Slide11Reverse Geocoding
Coordinates are known as in a phase II cell call. GIS uses these coordinates to search for the nearest civic address.
Road centerlines only give a rough approximation where good address points are likely to give you a specific, dispatchable location.
Potentially even 3D if address points have been built out to include units on all floors.
AVL of responding units may also show them next to a specific address. This could be important to know if they have stopped checking in with dispatch and we need to send additional personnel to check on them.
Slide12Location Validation
When an ALI location is validated against a spatial MSAG, it can get very specific using address points. If an address point is not found but it is road centerline valid, then the validated ALI is either incorrect or an address point is missing.
If address points include fully parsed sub address information (building, room, floor, unit, seat), then the ALI record could store this in a standardized form instead of a free form location field.
Slide13Addressing Clarity
Knowing where exactly each address refers to can be extremely helpful. Even with the best of intentions, addresses may not be assigned as systematically as they should be. Address points represent the actual addresses as they exist as opposed to an orderly and theoretic system as diagramed with road centerlines.
Often, only one address is attached to a parcel but there may actually be several addresses in use for multiple dwelling units.
Often, addressing authorities ask for feedback from emergency services and it can be very helpful to reference your address points, giving more meaningful feedback. Perhaps even spur them to correct some existing errors.
Slide14Call History
Sometimes calls are created at locations that may not have an address posted like a park or a storm pond. With address points, the call can be created at a consistent address and history searched at this address.
Slide15Precise Response Recommendation
Along Black Lake, there are many houses outside the city limits so the response should be the sheriff’s office and fire district 9.
The road itself is in the city of Tumwater so if the call is on the road it should be Tumwater PD and Tumwater FD.
With address points on structures, we can accurately identify the correct location about half a mile off the road. With the road centerlines, the location is about 30 feet off the center and thus in the wrong jurisdiction.
Slide16Questions?
There are no dumb questions. Well maybe some, but they are YOUR questions.
Slide17SSAP versus RCL
Road centerlines represent the addressing system (ranges, odds/evens)
Site structure address points show precisely where the actual address is
“Fishbones” are lines that show the relationship of SSAP to the RCL Examples
Sometimes RCL does wellOften SSAP is the only way to clearly communicate where.
Slide18Slide19Slide20Slide21Slide22Slide23Slide24Slide25Slide26Slide27Slide28Questions?
There must be something you are excited to ask…
Slide29GIS Work Group Priorities
Maintain accurate and current GIS Data
Support spatial call routing.
Address points and road centerlines are the basis of the new Spatial MSAG and LVF. Run internal quality control checks to catch editing errors.
Submit data to GeoComm monthly or more frequentlyZero Critical errorsEdge matching along PSAP boundaries.
Slide30GIS Deliverables
CPD4/S5 MSAG/Mapping/GIS Coordinators
Maintain, deliver, and improve GIS data (Road Centerlines and Address Points) for location validation (LVF).
Site Structure Address Points (SSAP) data MUST be submitted. By the end of the contract period (June 30), SSAPs published must at least be equivalent to 10% of the total number of ALI records.
To check the total SSAP required, no later than August 31 of the contract period, the GIS Coordinator will report to the SECO GIS Manager the number of ALI Records they have.ALI discrepancy reports (DR) WILL be submitted via Comtech’s ALI DBMS.90% of all Spatial MSAG location validation (LVF) change requests (CR) MUST be acknowledged within three (3) business days of being notified via email, and the remainder acknowledged within 10 business days. Acknowledgement of CRs is made by logging into the ALI DBMS and making a status change or entering a comment on CR.
Required GIS data layers pass critical quality checks and are published at least quarterly. More frequently is recommended and preferred, but not required.Participate in 66% of any scheduled GIS Workgroup meetings held during the contract period.
Slide31Critical Errors
NGUID: Unique IDs not unique
NENA mandatory field not populated
MSAG critical fields missing values (Legacy)Invalid PSAP URI or discrepancy agency ID
Multipart geometryPolygons: Significant gaps and overlapsRCL: Range overlapsSSAP: Duplicate address points not distinguished by sub address
Slide32Five Parts of GIS
Relatively Stable
Hardware: Need occasional refresh
Software: Routine updatesData: Continual maintenance after initial development push
Difficult to MaintainProcedures: May be stable if well documented and implemented with standard toolsPeople: Qualified people can be hard to find and expensive to train
Slide33GIS/MSAG Coordinators
E911: Addressing authorities need to coordinate MSAG and GIS
MSAG Coordinator uses the web interface for the ALI DBMS (
Intrado
then Comtech) to maintain MSAG, ALI, and ELT for ESN. GIS Coordinator maintains map data for the PSAP to locate callers. All addresses in the ALI DB should be mappable. Not exact duplicate of MSAG.NG911: MSAG and GIS Coordinators may become the same personAddress data flows to one point of contactAddress points and road centerlines are mapped and then used as the spatial MSAG. ALI is validated against the map that will later be used to plot it during a 911 call.Emergency service boundaries are mapped out and replace ESN/ELT.
Slide34Sharing 911 Map Data
Sharing authoritative data widely helps to prevent conflicting versions of reality and gets more eyes checking for accuracy.
Map services like Google Maps are often used for applications like those mapping 911 calls on smart phones carried by emergency personnel.
Third party
databases like HERE are often used to validate addresses when setting up WIFI calling.WAMAS is trying to maintain a Master Address Service for Washington in order to make state government more efficient and consistent.The National Address Database (NAD) is trying to assemble authoritative address data nationwide.A public facing Location Validation Function would help various people validate addresses including those used by small VoIP providers.
Slide35Thank you for your time and attention.
Jason Guthrie
360-704-2735
Jason.Guthrie@tcomm911.org
IT System Administrator/GISThurston 9-1-1 Communications2703 Pacific Avenue SE, Suite A, Olympia, WA 98501www.tcomm911.org