Weather Simulator

Weather-Simulator is a Java tool to predict weather for a location.

Approach

The tool predicts the weather data like Temperature, Cloud Cover, Dew Point, Humidity, Pressure, Wind Speed, Summary for a given location.

High level flow:-

1. Get the location details from User.

2. Based on location, get the Lat/Long coordinates using the configuration file LatLongCity.list.json.

3. Get the elevation of a location using Elevation API (https://elevation-api.io/)

4. Get the current weather data using Dark Sky API (https://darksky.net/dev) for that location.

5. Get the weather data for last N days for that location using Dark Sky API.

6. Get the last year weather data (Historical data) for that location using Dark Sky API. This includes ( LAST_YEAR_N_PREVIOUS_DAYS + LAST_YEAR_CURRENT_DATE + LAST_YEAR_N_SUBSEQUENT_DAYS ) weather data.

7. Last N days weather data is used to predict the features - Temperature, Cloud Cover, Dew Point, Humidity, Pressure, Wind Speed.

   Predicted value of a feature = Mean of a feature for last N days + Random number within ( 0 to Standard Deviation of that feature)

8. Last year weather data is used to predict the Summary Feature. Values of Summary Feature can be Sunny, Snow, Rain, Cloudy, Partly Cloudy, Clear etc.

   Prediction of Summary Feature = Euclidean distance between predicted Weather data and last year weather data and get the summary that have minimum distance

Sample Output

```
Location     Position                   Local Time           Conditions     Temperature Cloud Cover  Dew Point   Humidity   Pressure   Wind Speed
---------------------------------------------------------------------------------------------------------------------------------------------------
westmead     -33.803829,150.987686,34   2019-04-22 11:49:01  Partly Cloudy  68.68       0.50         64.18       0.91       1025.70    6.01
rooty hill   -33.76667,150.833328,50    2019-04-22 11:49:06  Mostly Cloudy  64.99       0.55         61.25       0.91       1026.07    4.33
sydney       -33.867851,151.207321,8    2019-04-22 11:49:10  Partly Cloudy  69.65       0.46         65.58       0.92       1025.73    8.31
seven hills  30.654079,-88.303062,50    2019-04-22 11:49:14  Clear          61.96       0.46         62.62       0.90       1016.13    6.84

```   

Technology Stack

• Java 8
• Maven
• JUnit
• RPM

RPM Download

Click here to download the RPM

Usage Instructions

1. Update the Weather API Key

   The tool uses the Dark Sky API to get the recent weather and historical weather details.

   Register the user in https://darksky.net/dev/register Login to Dark Sky API - https://darksky.net/dev/account to get the secret key.

   Open the WeatherSimulator.properties and update the property weatherAPI.connector.key

2. Build using maven

   Update the Weather API Key (property weatherAPI.connector.key) in src/test/resources/WeatherSimulator.properties

   mvn clean compile package -DWeatherSimulator.properties=src/test/resources/WeatherSimulator.properties

   Build will compile, test and generate the RPM and final RPM is copied to RPM Directory

3. Install RPM

   Click here to download the RPM

   [root@hdp3test3 ~]# rpm -ivh WeatherSimulator-1.0-1.noarch.rpm
   Preparing...                       ################################# [100%]
   Updating / installing...
   1:WeatherSimulator-1.0-1           ################################# [100%]
   [root@hdp3test3 ~]#
    
   

   

4. Running the script

   After installing RPM, Application will be available under /opt/WeatherSimulator

   • The scripts will be available under /opt/WeatherSimulator/bin/
   • Configuration files & log4j.properties are under /opt/WeatherSimulator/conf/
   • The application logs will be in /opt/WeatherSimulator/log/
   • The forecast output will be written to files under /opt/WeatherSimulator/output/

       [root@hdp3test3 ~]# cd /opt/WeatherSimulator/
   
       [root@hdp3test3 WeatherSimulator]# ls
       bin  conf  lib  log  output  Readme.txt
       [root@hdp3test3 WeatherSimulator]#
   

   

   Update the Weather API Key (property weatherAPI.connector.key) in /opt/WeatherSimulator/conf/WeatherSimulator.properties

       [root@hdp3test3 opt]# cd /opt/WeatherSimulator/bin/
       [root@hdp3test3 bin]# ./WeatherSimulator
       
        Enter the City/Suburb: Westmead
       
        Would you like to add more location (y/n): y
       
        Enter the City/Suburb: Rooty hill
       
        Would you like to add more location (y/n): y
       
        Enter the City/Suburb: Sydney
       
        Multiple Suburbs exist in same name.
        Id     Suburb                                    Country
       ======================================================================
        1      sydney                                    CA
        2      sydney                                    AU
       
       
        Select the suburb you would like to get the weather details: 2
       
        Would you like to add more location (y/n): y
       
        Enter the City/Suburb: Seven Hills
       
        Would you like to add more location (y/n): n
       
       
        Processing the Weather simulation
       
       
       Location     Position                   Local Time           Conditions     Temperature Cloud Cover  Dew Point   Humidity   Pressure   Wind Speed
       ---------------------------------------------------------------------------------------------------------------------------------------------------
       westmead     -33.803829,150.987686,34   2019-04-22 11:49:01  Partly Cloudy  68.68       0.50         64.18       0.91       1025.70    6.01
       rooty hill   -33.76667,150.833328,50    2019-04-22 11:49:06  Mostly Cloudy  64.99       0.55         61.25       0.91       1026.07    4.33
       sydney       -33.867851,151.207321,8    2019-04-22 11:49:10  Partly Cloudy  69.65       0.46         65.58       0.92       1025.73    8.31
       seven hills  30.654079,-88.303062,50    2019-04-22 11:49:14  Clear          61.96       0.46         62.62       0.90       1016.13    6.84
       
       
        Weather output written to /opt/WeatherSimulator/output/weatherResults2019_04_22_23_49_14.txt
       
        Weather Prediction completed.
       
       [root@hdp3test3 bin]#
       
       [root@hdp3test3 bin]# cat /opt/WeatherSimulator/output/weatherResults2019_04_22_23_49_14.txt
       Location|Position|Local Time|Conditions|Temperature|Cloud Cover|Dew Point|Humidity|Pressure|Wind Speed
       rooty|hill|-33.76667,150.833328,50|2019-04-22|11:49:06|Mostly|Cloudy|64.99|0.55|61.25|0.91|1026.07|4.33|
       sydney|-33.867851,151.207321,8|2019-04-22|11:49:10|Partly|Cloudy|69.65|0.46|65.58|0.92|1025.73|8.31|
       seven|hills|30.654079,-88.303062,50|2019-04-22|11:49:14|Clear|61.96|0.46|62.62|0.90|1016.13|6.84|
       [root@hdp3test3 bin]#
           
   

   

   

5. Uninstalling RPM

       [root@hdp3test3 bin]# rpm -e WeatherSimulator-1.0-1.noarch
       Uninstalling the Weather Simulator Setup completed
       [root@hdp3test3 bin]#
   

   

Troubleshooting

1. How do I debug the issues?

   Enable the DEBUG in /opt/WeatherSimulator/conf/log4j.properties. The logs will be in /opt/WeatherSimulator/log

2. How do I add new locations to the tool?

   Add the new location to /opt/WeatherSimulator/conf/LatLongCity.list.json.

   The sample format

   { "id": 123678, "name": "Trichur", "country": "IN", "coord": { "lon": 134.283333, "lat": 24.549999 } }

3. How do I improve the accuracy of the prediction.

   Increase the value of property weatherAPI.lastNDaysWeather in WeatherSimulator.properties. By default, tool takes the last 5 days and last year 10 days to predict the features. Increasing the value will help in providing more accurate predictions.

Credits

This application uses API's provided by below third parties.

1. Dark Sky API (https://darksky.net/dev) to get the recent weather and historical weather details.
2. Elevation API (https://elevation-api.io/) to get the elevation for a latitude/longitude coordinates.
3. OpenWeatherMap (https://openweathermap.org/api) to get the latitiude/longitude for a location.

Author

Nisanth Simon - NisanthSimon@LinkedIn