Solving the Mystery of Geographies
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Transcript of Solving the Mystery of Geographies
Presenters
JuHyun YooResearch [email protected]
Caitlin FlintDesign [email protected]
Join in on Twitter@HealthyCityCA#geoMystery
General [email protected]
Solving the Mystery of GeographiesJanuary 23, 2013
Offices in Los Angeles, Sacramento, Wash. D.C
Healthy City is a program of Advancement Project is a multi-racial civil rights organization using innovative tools and strategies to strengthen social movements and impact policy change.
PurposeCommunities of every race and class have the opportunities and resources they need to thrive
MissionHealthy City transforms how decisions are made by creating innovative tools and methods that expose and resolve structural inequities
…is about finding strategic solutions to support your work
DIRECT TECHNICAL ASSISTANCE:
Work ON-THE-GROUND to develop targeted research/policy
strategies and web tools.
COMMUNITY RESEARCH LAB
Engages, trains, and provides tools for community groups to lead and sustain
action-oriented research
ONLINE MAPPING TECHNOLOGYwww.HealthyCity.org
Agenda
Three Ways to Use Geographies on HC.org
Knowledge in Basic Census Geographies
How to choose geographies for your map
Three Ways to Use Geographies on HC.org• Map Geography• Data Geography• Area Boundary
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Three Ways to Use Geographies on HC.org
1 Map GeographySelect the geographic
area you want to map.
2 Data GeographySelect the geographic
unit of data you want to map.
3 Area Boundary Select the area boundary
you want to overlay on top of your map.
Three Ways to Use Geographies on HC.org
1 Map Geography Select the geographic area you want to map.
Change
Change the geographic area by selecting from the list.
Three Ways to Use Geographies on HC.org
1 Map Geography Select the geographic area you want to map.
Compare
Add another geographic area to compare two geographic areas.
DrawDraw your own boundary using existing boundaries or by drawing from scratch.
Three Ways to Use Geographies on HC.org
1 Map Geography Select the geographic area you want to map.
Three Ways to Use Geographies on HC.org
CheckCheck which geographic units are available for the data you are mapping.
SelectSelect the geographic unit of data you want to map.
2 Data Geography Select the geographic unit of data you want to map.
Three Ways to Use Geographies on HC.org
2 Data Geography Select the geographic unit of data you want to map.
Three Ways to Use Geographies on HC.org
2 Data Geography Select the geographic unit of data you want to map.
Three Ways to Use Geographies on HC.org
2 Data Geography Select the geographic unit of data you want to map.
Three Ways to Use Geographies on HC.org
Match Match the overlay boundary to data geography.
Orient Orient yourself within the mapped area.
3 Area Boundary Select the area boundary you want to overlay on top of your map.
Three Ways to Use Geographies on HC.org
3 Area Boundary Select the area boundary you want to overlay on top of your map.
Three Ways to Use Geographies on HC.org
3 Area Boundary Select the area boundary you want to overlay on top of your map.
Three Ways to Use Geographies on HC.org
3 Area Boundary Select the area boundary you want to overlay on top of your map.
Three Ways to Use Geographies on HC.org
Knowledge in Basic Census Geographies• Census Geographies – Political Areas and Statistical
Areas• Hierarchy of Basic Census Geographies• ZIP Codes? ZCTA?
Knowledge in Basic Census Geographies
Political Areas and Statistical Areas
Knowledge in Basic Census Geographies
• For statistical and data-reporting purposes• Artificially Created• Harder to be recognized by public
Political Areas Statistical Areas
• For administrative purposes• Identified by public easily• Can be complicated for data-reporting and analysis
Hierarchy of Basic Census Statistical GeographyDiagram adopted and edited from Urban Policy and the Census (2011) by H. MacDonald and A. Peters
Block• The basis of most Census Boundaries.• Boundaries are drawn based on city blocks.
Block Group
• In average, 39 blocks make up a block group.• 600~3,000 people per block group. (Optimum size=1,500 people)
Tract• 1,500 ~ 8,000 people (Optimum size = 4,000 people)• Smaller area size of tracts = higher population density• Designed to represent homogeneous population characteristics, economic status, and living conditions.
Knowledge in Basic Census Geographies
Knowledge in Basic Census Geographies
Smaller area size of tracts = higher population density
Hierarchy of Basic Census Statistical GeographyExample: Advancement Project (1910 W. Sunset Blvd. Suite 500 Los Angeles, CA 90020)
Knowledge in Basic Census Geographies
ZIP Code? ZCTA?
• ZIP = Zone Improvement Plan• Created by United States Postal Service (USPS) to make mail sorting and delivery more efficient. • Updated as needed, which is more frequent than the update cycle of Census geographies.
ZIP Code
ZCTA
• ZCTA = ZIP Code Tabulation Area• Created by the U.S. Census Bureau • Generalized the ZIP Code boundaries to summarize data by more recognizable geographic units. • Updated every ten years.
Knowledge in Basic Census Geographies
Questions?
How to choose geographies for your mapConsider your dataConsider your audienceUse local knowledgeExplore
How To Choose A Boundary
Consider your data
What kind of data are you mapping?Example: First 5 LA Best Start Communities
How To Choose A Boundary: Consider your data
How To Choose A Boundary: Consider your data
How To Choose A Boundary: Consider your data
AggregationCombining data fromsmaller geographiesto create a largergeography
How To Choose A Boundary: Consider your data
How To Choose A Boundary: Consider your data
Consider your audience
What geographies are they familiar with?What geographies are they concerned with?Example: SaveMySeatLA.org
How To Choose A Boundary: Consider your audience
How To Choose A Boundary: Consider your audience
How To Choose A Boundary: Consider your audience
How To Choose A Boundary: Consider your audience
How To Choose A Boundary: Consider your audience
Use local knowledgeDon’t discount personal experience
Rural areas—don’t want to use city/place(insert screenshot with area city place actually covers)
Is there a park or industrial area nearby—might account for large gaps
How To Choose A Boundary: Use local knowledge
How To Choose A Boundary: Consider your audience
All 1523 city/place boundaries
Data at City/place level geography
does not cover the entire state.
How To Choose A Boundary: Use local knowledge
How To Choose A Boundary: Use local knowledge
How To Choose A Boundary: Use local knowledge
ExploreWhat is most effective for your story?What has the most meat?
Ex: if I want to understand what's happening in my city, city level data won’t tell the whole story.
How To Choose A Boundary
How To Choose A Boundary: Explore
How To Choose A Boundary: Explore
How To Choose A Boundary: Explore
How To Choose A Boundary
Remember…Consider your dataConsider your audienceUse local knowledgeExplore
How To Choose A Boundary
Questions?
How To Choose A Boundary
What we learned
The End.
Three Ways to Use Geographies on HC.org
Knowledge in Basic Census Geographies
How to choose geographies for your map
Help is Available:Click on
• Healthy City User Guide
or • FAQs
Thank You!