README.md

In DouglasMesquita/marineApp: Shiny app to interact with the Marine dataset

Shiny Developer - Appsilon

About the app

This app is part of the hiring process at Appsilon. The time invested exploring the data and building the app was around 24 hours.

The main idea of the app is to present some AIS signal information of a huge list of vessels. Among other things, each observation is associated with a pair of latitude and longitude and the task is to discover the longest distance (in meters) without any signal for each vessel. This information should be presented in a map (using the leaflet library) and the app should be made using the shiny.semantic package.

In the data path, I also added the raw (omitted in GitHub) and preprocessed data. In the inst/extdata/analysis I added the scripts I used to explore and process the data.

• inst/extdata/analysis/01_data_exploration.Rmd: Some simple investigation of the dataset
• inst/extdata/analysis/02_preprocessing.R: Filtering the usefull data, renaming the dataset, calculating the distance between points (in meters) and calculating some statistics.

Some assumptions I made during the process:

• I will call “journey”, all observations for each trio (vessel_id, port, destination (even when it is NA))
• I will assume that the reported destination is correct for all cases

Installation

To install it from my github:

devtools::install_github("DouglasMesquita/marineApp")

Run it

marineApp::marineApp()

Links

• Live version: Marine app - Live version
• GitHub: Marine app - Github

Next steps

• I made some inferences about the dataset. It would be great to talk with an expert to understand some peculiarities of this data.
• It would be great if we had a column specifying the journey id, as each ship can have several journeys.
• The package documentation can be improved.
• Some IDs have changed since the data was collected and therefore, some photos are missing. In those cases, I put a default photo there but it would be nice to have it.
• The mobile layout can be improved (using the mobile argument in shiny.semantic::grid_template).

DouglasMesquita/marineApp documentation built on Dec. 17, 2021, 5:29 p.m.