GIS Clinic: Great Rivers Greenway

GREAT RIVERS GREENWAYNancy ColeGIS Clinic (U90 422 51)Washington University in St. LouisAugust 9, 2013

What is Great Rivers Greenway?


Metropolitan Park and Recreation District



Created in November 2000 by a vote of the people of the City of St Louis, St Louis County, and St Charles County (Proposition C)




Spans more than 1,200 square miles and 100+ municipalities





Funded by a 1/10 of 1 cent sales tax that generates $10 million annually





Funded by a 1/10 of 1 cent sales tax that generates $10 million annually

Mission: Make the St Louis region a better place to live, by …

Connecting communities and neighborhoods

Preserving and connecting people to nature

Improving economic vitality

Providing transportation choices Retrieved from: www.flickr.com

http://www.flickr.com/

Promoting good health

CityArchRiver | 2015 Retrieved from: www.cityarchriver.org

http://www.cityarchriver.org/

Todd AntoineDirector of Planning

Carey BundyProject Manager

Who did I work with at Great Rivers Greenway?

Retrieved from: www.greatriversgreenway.org

http://www.greatriversgreenway.org/


What GIS help was requested?

Retrieved from: www.greatriversgreenway.org



Task #1 Edit bike-lane data

Task #2 Prepare bike-rack data

Task #3 Facilitate data updates

Task #4 Develop model for selecting new bike-rack locations


Shapefile Feature Class


From street – at north or east end of segment

To street – at south or west end of segment

Edit existing features and attributes


Edit existing features and attributes

Individual records must coincide with changes in attributes.

• Street Name • Municipality


Before – Shapefile After – Feature Class


Create proposed features and attributes

Digitize Carondelet and Forest Park bike trails

Spreadsheet Feature Class



Geocode locations

Edit attributes

Task #2 Prepare bike-rack dataTrouble with Address Locator


Trouble with poor addresses & multiple or non-existent racks

Location Listed Actual

3100 – 3300 Morgan Ford Rd 11 10

3200 – 4700 S Kingshighway Blvd 9 5

7900 – 8200 N Broadway 3 0


Trouble with Create Feature Class


Trouble with domain & field attribute

• Only 2 of 113 racks were displayed when feature class was symbolized by type

• TYPE_RACK field deleted and re-created

Trouble with Script Error



Created geodatabase, feature dataset, and two feature classes

Created and assigned 11 domains


Used Simple Data Loader in Arc Catalog to permanently reorder fields

Task #3 Facilitate data updatesPrepared metadata for all 4 files


Research policies of other cities

Review GIS suitability-analysis methodologies

Research GIS analysis of bicycle facilities

Collect data layers for analysis

Run models, evaluate, rerun, document, and display


• Rack-request programs

• Rack-installation requirements

• Bicycle-parking zoning ordinances

Policies of other cities


• Boolean logic, using buffers, spatial selection, intersections, and spatial joins

• Vector- or raster-based overlay

• Weighted or fuzzy overlay, rating locations

• Kernel density smoothing

• Grid-cell analysis

GIS suitability-analysis methodology


2013 Montreal study

McGill University

School of Urban Planning


Seattle Bicycle Master Plan

Draft June 2013


Parking is an end-of-trip facility

Use destinations popular with cyclists as data layers

• Transit centers• Light-rail stations• Colleges/universities• Private schools• Public schools• Hospitals

• Libraries• Museums• Attractions• Large parks• Small parks


Create study-area fishnet

Cells1,000 feet by 1,000 feet

Grid89 rows by45 columns


Study-Area Fishnet Model


1,968 grid cells


Spatial Joins to Fishnet Model


Must delete Join_Count from Field Map


Grid-Value Calculation Model


• Experiment with different grid-cell sizes

• Add more criteria to selection process, e.g. retail & commercial areas

• Try different weights for criteria

• Map additional bike racks, not just arch and art racks

Further analysis


“Clear justifications for new cycling infrastructure and objective evaluation of past projects will result in a greater degree of transparency in transportation planning, and ultimately better planned cycling networks.”

Larsen, J., Patterson, Z., & El-Geneidy, A. (2013). Build it. But where? The use of geographic information systems in identifying locations for new cycling infrastructure. International Journal of Sustainable Transportation, 7(4), 299-317.

Questions?

GIS Clinic: Great Rivers Greenway

Technology

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