Embed Size (px)
DESCRIPTION
What does geolocation mean? How about geocoding? Reverse-coding? Geospatial? Is Google Maps' JavaScript API the best service to use? How do we avoid being rate limited? Should we import a free geographical dataset to make local SQL queries upon it? When do we move from Postgres and the Geocoder gem in Rails to PostGIS? Integrating location into your Rails app brings up a number of questions. This slide deck is intended to answer some of the basic ones and help you plan your location strategy. To go deeper, we have a full codebase (with tests) available at: https://learn.thoughtbot.com/geocoding-on-rails
Citation preview
Planning Your Location Strategy for Rails
-- C. Goldoni
“The world is a beautiful book, but it’s not much use if you don’t know how to read.”
https://learn.thoughtbot.com/geocoding-on-rails
I want to see places to stay in an interesting neighborhood.
https://learn.thoughtbot.com/geocoding-on-rails
I want to find hotels near public transportation.
https://learn.thoughtbot.com/geocoding-on-rails
How do we go from desired user outcomes to working software?
• Learn the vocabulary
• Know the responsibilities of each part of the tech stack
• Form a strategy
• Code!
https://learn.thoughtbot.com/geocoding-on-rails
Geolocation
n. The process of identifying the geographical location of a person or device by digital means.
https://learn.thoughtbot.com/geocoding-on-rails
Geocoding
v. The process of obtaining geographic coordinates (latitude and longitude) from full or partial address information.
https://learn.thoughtbot.com/geocoding-on-rails
Reverse-geocoding
v. The process of obtaining address information from geographic coordinates (latitude and longitude).
https://learn.thoughtbot.com/geocoding-on-rails
Geospatial
adj. Of or relating to the relative position of things on the earth’s surface.
https://learn.thoughtbot.com/geocoding-on-rails
https://learn.thoughtbot.com/geocoding-on-rails
https://learn.thoughtbot.com/geocoding-on-rails
Server-side (Ruby)
Interacts with external geocoding services and queries the database.
https://learn.thoughtbot.com/geocoding-on-rails
Database (SQL)
Persists geocoded data, available for geospatial queries.
https://learn.thoughtbot.com/geocoding-on-rails
Client-side (JavaScript)
Interacts with external geocoding services.
https://learn.thoughtbot.com/geocoding-on-rails
External service
Geocodes address, reverse-geocodes coordinates, draws map.
Know our data
• Are the records already geocoded?
• Do our records have address information?
• How accurate do we need the geographic information to be?
https://learn.thoughtbot.com/geocoding-on-rails
Choose an external geocoding service
• How many requests per day will we be making? Will we get rate limited?
• What are the comparable benefits of free, paid, and open source services?
• What is our budget?
https://learn.thoughtbot.com/geocoding-on-rails
Start with free libraries and datasets
• Google Maps JavaScript API
• Geocoder Ruby gem
• Area Ruby gem
• GeoNames downloadable geographical database
• PostGIS
https://learn.thoughtbot.com/geocoding-on-rails
Whiteboard our design
• Importing data
• Client-side responsibilities
• Server-side responsibilities
https://learn.thoughtbot.com/geocoding-on-rails
Testing
• Stub requests to external services
• Create a fake
https://learn.thoughtbot.com/geocoding-on-rails
https://learn.thoughtbot.com/geocoding-on-rails
Details in the book
Includes a complete codebase (with tests). Plot points on a map, use HTML5 to get coordinates in the browser, cache external services, index geospatial queries, and more.
![An Integrated Approach for ATM Location Strategy Using ......An Integrated Approach for ATM Location Strategy Using Analytic ... hybrid genetic algorithm to generate low cost [16]](https://img.pdfslide.net/doc/110x75/5f33fe9ea96b9328845e3c88/an-integrated-approach-for-atm-location-strategy-using-an-integrated-approach.jpg)
