an introduction to the baltimore neighborhood indicators alliance and geographic information systems...
TRANSCRIPT
An Introduction to The Baltimore Neighborhood Indicators Alliance and
Geographic Information Systems
Cheryl KnottGIS Analyst
BNIA-JFIUniversity of Baltimore
June 30, 2009
Topics:• BNIA-JFI
• Background• NNIP• Services• Data
• Vital Signs• Other
• Geographic Information Systems (GIS)• Introduction• Types of maps• Data sources• Geocoding
BNIA-JFI
• Part of the University of Baltimore• Jacob France Institute
• Variety of research areas• Ties with UB and other faculty
• Goal of BNIA-JFI• Provide accurate data and objective research• Strengthen the principle and practice of well
informed decision making
NNIP – Urban Institute• 32 Cities (and expanding)• Defining Functions
• Building and operating neighborhood-based indicator systems
• Facilitating and promoting the use of data by community and city leaders
• Emphasizing the use of information to build the capacities of institutions and residents
• Cross-Site initiatives• Prisoner re-entry• Early childhood readiness• Foreclosures
• National policy
BNIA-JFI Services
• One stop shop for data/information
• GIS
• Survey-based research
• Economic development
• Workforce development
• Community development
• Benchmarking
• Indicator analysis
• Legislative/policy analysis
• Transit-oriented development
• Market evaluation analysis (Baltimore DrillDown)
BNIA-JFI Recent Projects
• Baltimore Community Foundation
Community Engagement Initiative - Older Adults• Central Baltimore Partnership
Indicator Tracking and Maps• Associated Black Charities of MD
More in the Middle – Dashboard report• Downtown Partnership of Baltimore
State of the Downtown, 2008• Homes for America
Study of Annapolis, Maryland• Baltimore City
CEDS Evaluation
BNIA-JFI – Vital Signs
Vital Signs Topics:• Housing• Children, Safety, Health• Workforce/Economic Development• Sanitation• Transit• Education• Neighborhood & Community
BNIA-JFI
Other Data/Information:• Time Series• Relationships with data providers• Expanding focus
• Baltimore Metro• Data Committee• Flexibility
• New indicators• Additional datasets• Geography
Geographic Information Systems (GIS)
• What is GIS?• Maps• Databases
• History• Traditional cartography
• Digital evolution
Types of GIS Maps
Reference/Asset– maps that show where things are located spatially in reference to other landmarks/places or things of interest
Highway atlas, locations of public schools
Statistical/Thematic– maps that visually represent the spatial distribution of indicator data
Density of foreclosure filings, median household income by neighborhood
Spatial Statistics
• Points- Central tendencies- Nearest neighbor- Cluster analyses
• Lines- Characteristics (length, direction)- Connectivity
• Polygons- Characteristics (area, centroid distances)- Spatial autocorrelation
Spatial Statistics
• Univariate
- Mean/median/mode
- Variance
• Bivariate
- Correlations
- Trend analysis (regression models)
“Statistical Analysis of Geographic Information” by Wong and Lee
Data Sources• Proprietary data from Baltimore City Enterprise
GIS (City Hall) - assets• U.S. Census – boundary files• ESRI – Software and data packages
Any database with a location field (x,y or address)
Geocoding
• Lattitude/longitude (x,y)• Address
- References a center-line file
- Approximates location
Geocoding – Address Formats
• 6 necessary components: street number, street direction (if applicable), street name, street type, city, state, and zip
• Correct spelling ESSENTIAL
• Combine street number, direction, name, and type in one field
Geocoding – Address Formats
• Right: “400 N. Calvert Street”
“100 W. Baltimore St.”
“1716 Merritt Blvd.”
• Wrong: “5204 Liberty Hts” Spell out Heights; add Road
“600 Charles Blvd” No north/south; St. not Blvd.
“3604 Greenmunt Ave” Greenmount misspelled
Cheryl KnottBNIA-JFI
University of Baltimore
http://www.ubalt.edu/bnia/
Questions?