"Open Data"

(What does this even mean?)

Open Data

Open data is data that can be freely used, re-used and redistributed by anyone - subject only, at most, to the requirement to attribute and sharealike.

http://opendatahandbook.org/guide/en/what-is-open-data/

We gather a lot of data

Open Government Data

Government gathers a ton of data. Some of it is provided to the public by law.

But why do we care?

The Value of Open Data

• Transparency
• Make better decisions
• Improved efficiency/effectiveness of government
• And more ...

This feels like a huge burden

Open Data is a Learning Opportunity

Learning with open data

• Learn to code
• Try out new technologies
• "Intentional practice"
• The barrier to entry is low
• Build your open source portfolio
• And more ...

But, someone probably did this already

How do I get started?

Data Sources

• data.honolulu.gov
• data.hawaii.gov
• data.hawaii.edu

Crime Incidents

https://data.honolulu.gov/Public-Safety/Crime-Incidents/a96q-gyhq

Try Fetching

Go to the documentation and sign up for a token

https://dev.socrata.com/foundry/data.honolulu.gov/9kc2-xdwh

Fill out the required fields

When you are done, execute:

curl -H "X-App-Token: <Your token>" https://data.honolulu.gov/resource/a96q-gyhq.json

ArcGIS

Available Services

http://services.arcgis.com/tNJpAOha4mODLkXz/ArcGIS/rest/services

ArcGIS Layers

Let's look at the neighborhood board subdistricts.

You can view this on a map, but we're interested in querying the layer.

​http://services.arcgis.com/tNJpAOha4mODLkXz/ArcGIS/rest/services/Neighborhood_Board_Subdistrict/FeatureServer

Basic Query

Click on "Query" at the bottom of the page.

Some magic settings:

• Set "Where" to "1=1"
• Set "Out Fields" to "*"
• Set "Return Geometry" to "False" (Important!)
• Set "Format" to "JSON"

Complex Query

Find a lat/lon on Google Maps

Blaisdell is 21.301693, -157.849541

Settings:

• Set "Geometry" to "<lon>,<lat>"
• Set "Geometry Type" to "Point"
• Set "Input Spatial Reference" to "4326"
• Set "Spatial Relationship" to "Intersects"
• Other fields remain the same

Some Projects

HI Park

http://citycamphnl.govfresh.com/

City Camp Hackathon,
January 2012

Find parking spots near UH and see when they're available.

Django

jQuery Mobile

Redeem HI-5

http://www.techhui.com/profiles/blogs/playing-with-honolulu-data

http://redeemhi5.com

September, 2012

See all recycling centers on the island of Oahu and when they are open.

Node.js (0.8)

jQuery Mobile

Backbone.js

Coffeescript

HI Traffic

https://github.com/hitraffic

Dev League Cohort 3,

February, 2015

API for fetching traffic incidents.

Node.js

Cheerio (screen scraping)

Ionic / Angular.js

Tutorial in React Native

Park Carma

Reboot the Commute,

May 2015

App for finding parking spots and how long they're available

Ionic / Angular.js

Firebase

Trash Pickup

Started February 2016

App for seeing when your next trash pickup is

React Native

ArcGIS

http://github.com/keokilee/trashpickup

The Challenge

• Find a public data set
• Make a simple app/website to display the data (or sketch it out)
• Come to the next Code for Hawaii meetup and talk about it (6:30 PM on March 9th at The Box Jelly)
• More details: http://www.meetup.com/Code-for-Hawaii/events/229336057/