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An Introduction to The Baltimore Neighborhood Indicators Alliance and Geographic Information Systems Cheryl Knott GIS Analyst BNIA-JFI University of Baltimore June 30, 2009
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Topics: BNIA-JFI Background NNIP Services Data Vital Signs Other Geographic Information Systems (GIS) Introduction Types of maps Data sources Geocoding
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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
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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
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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)
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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
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BNIA-JFI – Vital Signs Vital Signs Topics: Housing Children, Safety, Health Workforce/Economic Development Sanitation Transit Education Neighborhood & Community
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BNIA-JFI Other Data/Information: Time Series Relationships with data providers Expanding focus Baltimore Metro Data Committee Flexibility New indicators Additional datasets Geography
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Geographic Information Systems (GIS) What is GIS? Maps Databases History Traditional cartography Digital evolution
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Old vs. New
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GIS Software Specialized software for mapping ArcGIS from ESRI MapInfo
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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
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An example of an asset map
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An example of a thematic map
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Spatial Statistics Points - Central tendencies - Nearest neighbor - Cluster analyses Lines - Characteristics (length, direction) - Connectivity Polygons - Characteristics (area, centroid distances) - Spatial autocorrelation
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Spatial Statistics Univariate - Mean/median/mode - Variance Bivariate - Correlations - Trend analysis (regression models) “Statistical Analysis of Geographic Information” by Wong and Lee
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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)
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Geocoding Lattitude/longitude (x,y) Address - References a center-line file - Approximates location
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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
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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
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Cheryl Knott BNIA-JFI University of Baltimore cknott@ubalt.edu 410-837-4377 http://www.ubalt.edu/bnia/ Questions?
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