US Health Prevalence Indicators viewer. Sources of data are spreadsheets which are available at the US CDC site. Proved indicator sheets are Diagnosed Diabetes Prevalence, Leisure-time Physical Inactivity Prevalence and Obesity Prevalence.
The application does not read data directly from the spreadshets. Instead, it lets you load that data and exposes an API to access it. This way the access is faster. This API and the database connection is built with the Loopback framework.
The viewer is a client-side application that access the API, and is built with the React framework.
- Loopback 3.0.0 (Node required)
- React 15.5.4
- Webpack 2.5.1
- PostgreSQL (9.4 or above)
This project is only working in development mode. Production-like environments were left out of the scope.
To run the application from scratch, you need to follow the steps below:
- Install project NPM packages
npm install
- Configure the PostgreSQL data source
Rename file at server/datasource.json.example for server/datasource.json (.example suffix removed) and edit json properties with your own PostgreSQL connection data (host, port, user and password). For database property, you can keep the example name of create one of your preference.
Keep the rest just like the example.
- Create database
Next you need to create the Postgres database. You can do something like:
createdb database_name
Or create the database directly using the psql CLI.
The database name has to be the same as the datasource.json database field
- Migrate Loopback models
Loopback supports auto-migration, which lets you create a database schema from Loopback models. Execute the following at the root of the project:
node bin/automigrate.js
When it logs the message Models automigrated, press Ctrl + C to return to the prompt.
- Run the application
Type the folliwing at the root of the project:
npm run start
At this point you can access the application at http://localhost:3000, but it will have empty data, so let's populate our database.
- Download actual data
Go to the CDC county indicators site and download the three spreadsheet named at the beginning (Diagnosed Diabetes Prevalence, Leisure-time Physical Inactivity Prevalence and Obesity Prevalence). Make sure to download the All states sheets.
- Upload sheets
Go to http://localhost:3000/upload. You'll see a tiny form for uploading CDC Excel files. Choose each of the recently downloaded files, and press the Load data button.
You'll see the following message:
Data loading started. Check API later to see results.
Yes, it's uploading the sheet data. You can just wait a few minutes or check the terminal to see if it's still logging messages, or if it's just quiet for more than a couple of minutes.
Repeat this process for each of the 3 downloaded spreadsheets.
- Visit the main page
Now that we have populated our database, it's time to see the application in action. Go to http://localhost:3000 and start playing.
And that's it! Enjoy! :)
Brought to you by Sebastián Vicencio