Data + Visualization Toronto Meetup 4: The Google Maps API

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Trimmed version of slides shown at the Data + Visualization Toronto Meetup Group's Fourth Meetup. Contains information about the Google Maps API, and Google Geocoding API.

Technology Business

Raining Cats and
Dogs
DVTO 4: The Google Maps API

http://www.toronto.ca/fire/cadinfo/livecad.htm

Slides Removed
•
•
•

See http://www.torontofirecalls.com for app
http://www.toronto.ca/fire/cadinfo/livecad.htm
http://www.toronto.ca/fire/cadinfo/livecad.xml

Designs and Compromises

• “First make it possible. Then make it beautiful.
Then make it fast.” -Nathan Marz

Make it Possible

• Node JS and Redis, because programming
• Revert to Rails and Postgres, because spaghetti

Every 5 Minutes do X
1. Custom Rake Task w/ Heroku Scheduler
2. Clockwork and Delayed Job (OMG $$$)
3. Clockwork and Delayed Job with Workless
4. Switch to WebFaction
5. Bare Cron
6. Cron by Whenever Gem

Slide Removed

•

http://mapicons.nicolasmollet.com/

Make it Fast(er)
•

NewRelic development agent -> Profiled

•

Event retrieval on click? Not scalable

•

Optimized AR Queries

•

InfoWindow Generation/Retrieval to AJAX

Google Geocoding API
•

http://maps.googleapis.com/maps/api/geocode/j
son?address=1600+Amphitheatre+Parkway,
+Mountain+View,+CA&sensor=true

•

JSON or XML, HTTP or HTTPS

•

2,500 requests per 24 hour period.

•

Also a rate limit, so sleep during bulk geocodes

Reverse Geocoding

•

Have location, need address.

•

http://maps.googleapis.com/maps/api/geocode/j
son?latlng=40.714224,-73.961452&sensor=true

Slide Removed

•

https://github.com/alexreisner/geocoder

Geocode Happy
1. Realistic use case?
2. Have a strategy.
3. Check the TOS.

Slide Removed

•

See
https://github.com/apneadiving/Google-Maps-for-Rails

Bonus Resources

•

CartoDB and Torque

•

Google Maps Mania Blog

Slide Removed

•

http://lifewatch.inbo.be/blog/posts/trackingeric.html

Matt
Holtom
matt@codeandiron.com
@mattholtomTO

Code &
Iron
codeandiron.com
@codeandiron

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Data + Visualization Toronto Meetup 4: The Google Maps API

1. Raining Cats and Dogs DVTO 4: The Google Maps API

2. http://www.toronto.ca/fire/cadinfo/livecad.htm

4. Slides Removed • • • See http://www.torontofirecalls.com for app http://www.toronto.ca/fire/cadinfo/livecad.htm http://www.toronto.ca/fire/cadinfo/livecad.xml

5. Designs and Compromises • “First make it possible. Then make it beautiful. Then make it fast.” -Nathan Marz

6. Make it Possible • Node JS and Redis, because programming • Revert to Rails and Postgres, because spaghetti

7. Every 5 Minutes do X 1. Custom Rake Task w/ Heroku Scheduler 2. Clockwork and Delayed Job (OMG $$$) 3. Clockwork and Delayed Job with Workless 4. Switch to WebFaction 5. Bare Cron 6. Cron by Whenever Gem

8. Slide Removed • http://mapicons.nicolasmollet.com/

9. Make it Fast(er) • NewRelic development agent -> Profiled • Event retrieval on click? Not scalable • Optimized AR Queries • InfoWindow Generation/Retrieval to AJAX

10. Part 4 Google Geocoding and Maps API’s

11. Google Geocoding API • http://maps.googleapis.com/maps/api/geocode/j son?address=1600+Amphitheatre+Parkway, +Mountain+View,+CA&sensor=true • JSON or XML, HTTP or HTTPS • 2,500 requests per 24 hour period. • Also a rate limit, so sleep during bulk geocodes

12.

13. Reverse Geocoding • Have location, need address. • http://maps.googleapis.com/maps/api/geocode/j son?latlng=40.714224,-73.961452&sensor=true

14.

15. Slide Removed • https://github.com/alexreisner/geocoder

16. Geocode Happy 1. Realistic use case? 2. Have a strategy. 3. Check the TOS.

17. Markers on a Map

18. Step 1

19. Step 2

20. Step 3

21. Step 4