cx 3 tools and methods tier 1 gis mapping alyssa ghirardelli, mph,rd

CX3

Tools and Methods

Tier 1GIS Mapping

Alyssa Ghirardelli, MPH,RD

Mapping Overview

• The Power of Maps• Ways to Use Maps

– Building Partnerships– Community Forums– Local Empowerment– Buy-in from Leadership– Elevating Action with Influential People

• Collect complete and accurate data• GIS mapping is only a snapshot• Maps should not sit on the shelf, share!• GIS has many applications, CX3 only one

Mapping Overview

Approaches to Mapping– Map By Neighborhood– Map By Indicator

Approach to mapping will inform Tier 2 field survey methods

• Create system to organize maps, data lists and worksheets (electronic files and hard copies)

• Worksheets are worksheets

• Worksheets help interpretation, find meaning for sharing information

• Data from worksheets will be entered by staff in Sacramento

• One page summary of data from neighborhoods will be created

Tier 1 Data Organization & Summary

Mapping Overview Tour of Network GIS

-GIS=Geographic Information System-Basically system to display information from

database through geocoding and layers-Logging on: http://www.cnngis.org

OR http://gis.cdph.ca.gov/cnn/-Navigating the site-Areas and functions you will use-But much more to explore!

Tour of Network GIS Left Screen Operators

• Zoom In• Zoom Out• Last View• Full View• Pan• Get Info• Select

• Clear• Measure • Clear Theme• Query• Save Map• Load Map

Tour of Network GISRight Screen Databases and Functions

Map Layers– Layers List– Legend

Locate– Search– Results

Advanced– Census– Buffer

• Drawing buffer

• Draw point location

– Measure

Tour of Network GISTop and Bottom Screen

• Information about data sources

• Quick way to get around in map viewer

• How to download data from map view

SNAP-Ed Census Tract Qualification

1. Proportion < 185%FPL All Races

2. Proportion in poverty < 100% FPL by race-ethnicity

3. Block Group (BG) proportion < 185% FPL All Races

• In 2012 proportion < 185%FPL race-ethnic layers will be made available BG <185%

<100% Hisp

<185% All RWays to Qualify: Demographics

LayerEconomic Indicators ACS 2005-2009

SNAP-Ed Census Tract Qualification

• If re-assessing a neighborhood:– No need to re-qualify – Mapping and field survey data collection are evaluation– You will compare current data with previous data

• If identifying new areas to map: – Neighborhoods must qualify – ACS 2005-2009 data layers

1. Proportion < 185% FPL All Races

2. Proportion in poverty < 100% FPL by race-ethnicity

3. Block Group (BG) proportion < 185% FPL All Races

NF1- Supermarket Access

• Total number of residents served by supermarkets or large grocery stores (> 20 employees and accounting for any overlap of markets)

• Estimated percent of neighborhood residents served and not served

• Approximate distance required to travel to supermarkets for most residents (2/3 or more)

1. Identify neighborhood

2. Obtain population data, use Total Pop

3. Map “Retail Food Outlets”, “General Grocery”

4. Obtain supermarket data (>20 emp only)

5. Map ½ mile (2640 feet or .5 miles) buffer around selected stores

6. Determine estimate of percent of population in neighborhood served by ½ mile buffer

7. If no supermarkets, expand buffer to find distance required to get to one by most residents

NF1- Supermarket Access

Food Source ½ mile service areaOak Park Neighborhood

Finding Access in Food Desert1 ½ miles to large grocery store

1. Draw Point Location

2. Buffer around point until large grocery found

3. Use return attribute data for general grocery to find

Allow Pop-Ups for GIS

1. Open Internet Explorer

2. Click on: Tools | Pop-up Blocker | Pop-up Blocker Settings

3. In the Address of website to allow box, type the address (or URL) of the GIS websites (http://www.cnngis.org/) and (http://gis.cdph.ca.gov/cnn/) click Add, then click Close

POP UP’s are a good thing in this case

1. Locate Neighborhood Census tracts:– 06001402600– 06001402700

2. Map grocery stores (retail)

3. Download grocery stores

4. Find number of supermarkets w/>20 employees in neighborhood

NF1- Supermarket AccessExercise

One Store?

5. One store?

6. Using the measure tool or expanding the distance and units, how far do most of the residents in neighborhood need to travel to get to a large grocery store?

7. Discuss

NF1- Supermarket AccessExercise (cont.)

-Only serving a portion of the neighborhood-Use population data to estimate percent served-Notice highway barrier

Supermarket AccessWorksheet

NA2- Supermarket Access Transit

• Proportion of supermarkets or large grocery stores (> 20 emp) with convenient public transit– Supermarket or large grocery store has a stop

within 1 block– Frequency: No less than 30 minutes each way

including evenings and weekends– Make note if poor route access through residential

areas• Transit score for supermarket address• If no market in the neighborhood, expand search

with buffer – Urban or older/denser suburb—2 miles– Newer suburb—5 miles– Rural—15 miles

1. Find transit agency(ies)

2. Obtain schedules and routes

3. Check neighborhood maps for routes w/in 1 block of supermarket

4. Draw routes and check schedules (can do electronically using map placed into Word)

5. If no supermarket in neighborhood, find closest and check transit

6. Find Transit Score (walkscore.com)

NA2- Supermarket Access Transit

Rte. 51

Rte. 83

Food Source at 4401 Broadway, Sacramento, CA

Oak Park Neighborhood

• Transit Score Available with list of routes

NA2- Supermarket Access Transit

Supermarket Access Transit Worksheet

NF2- Markets Around Schools

• Number of small markets and convenience stores within ½ mile of schools

• Proportion of schools with small markets and convenience stores within ½ mile

– Out of total number of schools how many have small markets and convenience stores

• Highest number of small markets and convenience stores for a school within ½ mile (ie. worst case scenario)

1. Map schools

2. Map grocery stores and convenience (“Retail Food Channels”, “Retail Food Markets”, “General Grocery” and “Convenience Group”)

3. Download grocery store and convenience store data

4. Draw ½ mile buffer around each school

5. Count and record small markets (≤ 20 emp) and convenience stores within buffer around each school

CX3 Tier 1 NF2- Markets Around Schools

NF2- Markets Around SchoolsExercise

1. Locate Neighborhood Census tracts:– 06037212410 - 06037212304 - 06037212420

06037212305 - 06037212303 - 06037212306

2. Map public schools, grocery stores, convenience3. Draw ½ mile buffer (2640 feet) around K-12 in

06037212304 on 7th and Mariposa

4. Return attribute data for general grocery 5. How many small markets w/in ½ mile w/≤ 20

employees?6. Return attribute data for convenience7. How many convenience stores?8. Do any markets/convenience stores fall outside

qualify census tracts? Discuss.

Markets Around SchoolsWorksheet

NF7- Farmers’ Markets

• Number of farmers markets in the neighborhood and if accept EBT, WIC, Senior Vouchers

• If no farmers markets in neighborhood, number within 5 miles– If they accept EBT, WIC, Senior

Vouchers– If have convenient public transit

1. Map market(s) in neighborhood

2. Assess if accept EBT

3. If no farmers’ markets in neighborhood, select central location and expand buffer to 5 miles

4. Assess if convenient transit to market(s) within 5 miles

5. Obtain farmers’ market data (optional)

NF7- Farmers’ Markets

1. Locate Neighborhood Census tracts:– 06077003404– 06077003405

2. Map farmer’s markets

3. Is/are there a market(s) in the neighborhood?

NF7- Farmers’ Markets Exercise

4. Is/are there a market(s) with in 5 miles of the neighborhood?

5. If yes, how many?

6. Does it accept EBT?

7. Using measure tool, how far from center point of neighborhood?

NF7- Farmers’ Markets Exercise (cont.)

Farmers’ market Just over 1 mile from center of neighborhood

Neighborhood = 2 Census Tracts in blue

Farmers’ MarketWorksheet

NF9- Fast Food Outlets

• Ratios of fast food to population• Number of outlets within 1000 ft and ½ mile to

schools and parks in neighborhood• Proportion of schools/parks with fast food

outlets within 1000 ft and ½ mile– Out of total number of schools how many have fast

food outlets

• Highest number of outlets for a school/park with fast food within 1000 ft and ½ mile (ie. worst case scenario)

Neighborhood Density

1. Map fast food outlets (“Retail”, “Eating Places”, “Fast Food, Pizza, Sandwiches”)

2. Download list to classify

3. Use census tracts population data from NF1

4. Calculate the ratio of fast food outlets to the neighborhood population

NF9- Fast Food Outlets

Relationship to Schools and Parks1. Map schools

2. Map fast food outlets (“Retail”, “Eating Places”, “Fast Food, Pizza, Sandwiches”)

3. Draw 1000 ft. buffer around each school

4. Count and record fast food within buffer around each school

5. Repeat for parks

6. Repeat for both schools and parks using ½ mile buffer

NF9- Fast Food Outlets

½ mile access to Fast Food Sacramento High School

1. Locate Neighborhood Census tracts:– 06037224020

– 06037224010

– 06037226410

– 06037226000

2. Map schools

3. Map FF outlets

4. ID name of high school on Maple Ave and Washington Blvd.

5. Draw ½ mile buffer around this school

6. Find the number of FF outlets in buffer and in the neighborhood census tracts

NF9- Fast Food Outlets Exercise

15 Fast food in buffer and neighborhood

Fast FoodWorksheet

NA7- Pedestrian AttractionsWhat’s walkable in the neighborhood?

Optional:•Score of amenities within a walkable distance (1 mile) from the neighborhood school, an address within neighborhood or cross streets within neighborhood – using walkscore.com•Points based on the distance to the closest amenity by category. If the closest amenity in a category is within .25 miles, the maximum number of points are assigned. The number of points declines as the distance approaches 1 mile

Walk Score (walkscore.com)

NA7- Pedestrian AttractionsExercise

1. Go to walkscore.com

2. Enter the following to get the scores:– School: Bobby Duke Middle School, Coachella,

CA– Address: 4769 Hazel Ave, Fair Oaks, CA– Cross Street: N and 16, Sacramento, CA

3. Discuss

You, too, can create cool maps!!!

Creating a Map – Step by Step

1. Right click on GIS map (or legend)

2. Save as picture…..

3. Open MS Word, insert picture from file…..

4. Highlight areas or specific focus points on maps by adding shapes (arrows, text boxes, brackets, etc…)

5. Add picture from Google Street View

6. Save map

7. Copy to PPT slide

See handout for detailed instructions

Mapping Practice in Local Area

1. Locate neighborhood in own county

2. Search by city

3. Turn on census tract layer and zoom in as needed

4. Select 1-4 census tracts using demographic criteria (income, race, other)

5. Map food stores using retail grocery layer

6. Open new internet window and locate public transit site (if available)

7. Find route(s) in neighborhood (try using transit score?)

8. Copy GIS map and legend to Word file and draw transit route (if no transit available, embellish map some other way.... ie. text box, etc)

Use of other data sources

• Environmental health data• Google/Yahoo• Google street view• City crime data

– variable, but emerging

• Walkscore– walkscore.com

• Healthy City– healthycity.org – All CA- does not include data

about store for points on map

• Finalizing new GIS layer for restaurants and method to include coffee shops, ice cream, donuts and other types of restaurants within ½ mile of schools

• A “retail exposure scale” will be provided to help compare and identify schools

• Also a neighborhood “school score” will be available to look at stores, fast food, outdoor marketing and mobile vending around schools

http://www.cdph.ca.gov/programs/cpns/Pages/CX3_Main_Navgation.aspx

New!!!Secure Data Transfer

Lynn to send you user information and instructions

Next Steps

• CX3 planning team- Who to invite?

• Educate local health department leadership about CX3

• Neighborhood selection

• Tier 1 Worksheets completed and sent to Lynn no later than February 29th – the earlier the better!!!

• Monthly check-in calls

Tier 1 Data Entry

Send us your data and maps!Send completed worksheets to

Lynn Fuhrman

Lynn.Fuhrman@cdph.ca.gov

916-552-9862