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Presented by: Dan Munson Founder, VP of Sales & Marketing Presented: June 15, 2022 CDS Business Mapping Parcel Level Geocoding
Presented by: Dan MunsonFounder, VP of Sales & Marketing
Presented: April 22, 2023
CDS Business MappingParcel Level Geocoding
About CDS Business Mapping Founded in 1994 as a mapping (GIS) consulting company Has evolved into a company that specializes in hazard
mapping for insurers, underwriters, and agents Main business now revolves around the RiskMeter and
related services Company is now a national leader
Complete projects/maps on a service basis Sell a complete line of mapping software
The Risk Meter Online™ Performs property risk reports Internet based service
Instant results Quick, accurate, easy-to-use
Check individual risks or an entire book for geographic risks (Batch)
Software has been in use since 1996 Internet version (RM Online) 1998
Reports Available Distance to Shore Flood Zone Determinations Proximity to Brush Fire Hazards MMI, Soil, EQ Scores Crime Scores State Wind Pool Eligibility Storm Surge State Tax Codes Hail Exposure Index Tornado Exposure Index Rating Territory (Your territories) Building Characteristics (year built/SF/# of Stories, etc) Slope, Aspect, Elevation Aerial Photos
And More!!!
Street Level Geocoding Geocoding is the process of finding geographic
coordinates (e.g. Latitude and Longitude) from geographic data such as street addresses or ZIP codes
Geocoding is often performed through interpolation of street segments.
Interpolation takes known address ranges from a street segment and places the point relative to where the address number falls within the range of addresses on that street segment (125 Broad St. would be towards the end of a street segment ranging from 2 – 140)
There are many different levels of accuracy when geocoding
Problems with Street Geocoding Not all parcels are the same width Not all numbers in an address range
actually exist Irregularly shaped parcels (corners)
All lead to positional errors Average accuracy is +/- 167’
Levels of Accuracy S8- Single Match to the Centroid of a Parcel S7- Match Interpolated Along a Street Segment
Between Known Addresses S6- Single Match to a Point Zip Code S5- Single Match to a Street Address Position S4- Street Match S3- Zip+4 Match S2- Zip+2 Match S1- Zip Centroid Match SX- Street Intersection Match
Best
Worst
Geocoding Levels
Parcel Geocoding Parcel geocoding maps the address to the centroid of
the parcel Centroid points are based on parcel polygons acquired
directly from municipalities across the United States and conflated monthly with postal data from the USPS
Geographically most accurate form of geocoding available
98% of all differences less than 250% 25-50% change in the actual parcel
If a parcel match is not found, it falls back to street address interpolation
Parcel Geocoding
Uses
Most valuable where accuracy matters High Accuracy Needed
Flood Zones Storm Surge Brushfire CA Landslide/Liquefaction
High Accuracy Preferred Tax applications Rating territories
Parcel Geocoding Coverage
Why don’t all addresses get parcel matches?
Many counties don’t have digital parcel maps; so no data available
Locations can have multiple street names; assessor will only have one of them
Condo buildings are handled in very strange ways Many times not included APN numbers don’t match Parcels are cut into little pieces (50 units, 50 pieces)
Questions?Dan MunsonFounder, Vice President of Sales & MarketingCDS Business Mapping67 Broad St. – 6th FloorBoston, MA [email protected]
www.riskmeter.com
