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A Survey and Analysis of GIS Web Mapping Applications in Washington State
Greg Babinski, GISPKing County GIS CenterSeattle
Why Do Agencies Develop Web Mapping Applications?
Low-cost basic GIS capability
Alternate to expensive desktop GIS software
Provides GIS capability to the public
Low cost enhanced service for citizens
Reduces phone calls or visits for basic public services
Others?
Web Mapping Application Statistics
Extensive Published Statistics Specialized Web Application Performance Analysis Specialized Web Map Data Usage Analysis Simple High Level Usage Statistics:
Internal (agency) usage External (public) usage User sessions Length of sessions Hits or page views per session Total unique users Correlate internal I/P address ranges with specific users
Web Mapping Research Objectives
What is the potential for web mapping application usage within jurisdictions?
How can we know if external use of our applications has reached ‘market saturation’?
Does our ‘market-population’ adjusted usage differ from other jurisdictions, and if so, why?
KCGIS Center Web Mapping Applications
ParcelViewer
CensusViewer
iMap
http://www.metrokc.gov/gis/mapportal/index.htm
King County iMap
KCGIS Web Mapping Application User Statistics: 2002-Present
Total User Sessions
Total Map Page Hits
Internal Sessions & Hits
Public (External) Sessions & Hits
Average Length of User Session
KCGIS Web Mapping Application User Statistics: 2002-Present
KCGIS Web Mapping Application User Statistics: 2002-Present
KCGIS Web Mapping Application Internal User Statistics
County IT Division Correlates I/P Address Ranges with County Business Units
Used to Allocate Web Mapping Application Costs to Business Units (Babinski, 2005)
34 Work Units Identified
Individual Users can be Identified
KCGIS Web Mapping Application Internal User Statistics
KCGIS Web Mapping Application Internal User Statistics
External Web Mapping Usage Survey
Mid-2007 survey with 10 questions
Sent to 88 jurisdictions with public web mapping applications
Seven (7) cities in Washington State
Five (5) cities outside Washington State
30 counties in Washington State
39 counties outside Washington State
One (1) regional agency in Washington State
Six (6) regional agencies outside Washington State
External Web Mapping Usage Survey
Initial 2007 survey response disappointing
15 completed surveys returned (17%) and only eight (8) track usage statistics:
Four (4) counties in Washington
Three (3) counties outside Washington
One (1) regional agency outside Washington
Only five (5) agencies reported multi-year statistics
Three (3) agencies reported single-year statistics
External Web Mapping Survey Discoveries:Market Saturation Trends
External Web Mapping Survey Discoveries:Population Adjusted External Usage
External Web Mapping Survey Discoveries:Internal Agency Usage Comparisons
Washington State Web Mapping Survey
Washington State Web Mapping Survey
Washington State Web Mapping Survey
Washington State Web Mapping Survey
Washington State Web Mapping Survey
39 Counties:• 31 with Public Web Mapping • 8 without Public Web Mapping
• 15 ESRI ArcIMS• 6 TerraScan Map Sifter• 5 Misc. Platforms• 5 Unknown
12 Municipalities:• 31 with Public Web Mapping • 8 without Public Web Mapping
• 3 ESRI ArcIMS
Washington State Web Mapping Survey
Key Observations & Further Research Needs
Slowing growth in application use appears to be common Usage plateau reached in three to five years Variation in market penetration statistics warrants deeper
investigation Analysis of internal usage statistics sheds light on
anonymous GIS use Analysis of internal usage statistics provides insight into
agency business unit GIS needs
Broader base of relevant statistics needed from agencies Detailed internal statistics from other agencies
Questions and Follow-up Research Discussion
Questions? Suggestions? Research Directions?
Greg Babinski, GISPFinance & Marketing ManagerKing County GIS Center201 South Jackson Street, Suite 706Seattle, WA [email protected]/gis
