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researcherera authored and gitbook-bot committed Jul 14, 2024
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Expand Up @@ -31,20 +31,27 @@ This tool is a platform that helps you visualize train destinations within Europ

1. _Interactive Map_

_**What it does:**_ The core feature of Chronotrains is it’s interactive map. Users click on any train station on the map to see how far they can travel by train within a certain time frame. 

**Why it matters:** This visualization helps users quickly understand the reach of train travel from different locations, which can be useful for trip planning and understanding regional connectivity.

2. _Travel Time Visualization_

**What it does:** It shows travel times in different colors on the map, making it easy to see the areas you can reach within 1 hour, 2 hours, and up to 8 hours. 

**Why it matters:** This feature allows users to easily compare travel times between different locations, helping them make informed decisions. 

3. _Data integration_

How it works: According to the tool’s [website](https://www.chronotrains.com/en/8), this map integrates data from [Deutsche Bahn](https://www.bahn.de/) through [Direkt Bahn Guru](https://direkt.bahn.guru/). 

### Possible use cases

While originally used to plan trips, Chronotrains can be repurposed for open-source investigations. 

This can aid open-source investigations with a time-sensitive location element. 

It can be used to:

* Potentially verify travel claims: By entering a location and timeframe, investigators can see if a reported train travel aligns with what's realistically possible.
* Potentially track movement patterns: Analyze potential routes and locations reachable by train within a specific timeframe, helping identify areas a person of interest might have visited.

### How does it work? 

The platform’s [GitHub page](https://github.com/benjamintd/chronotrains) provides an explanation of the tools' inner workings.
Expand All @@ -69,27 +76,6 @@ For each station, the system checks which other stations you can get to in a cer

**API by Direkt Bahn Guru:** This data is made easier to access and use through a tool (API) provided by Direkt Bahn Guru, which helps to organize and provide the data in a convenient format.

_Data Processing (Scraping and Pre-computing):_

* Scraping Data: This means Chronotrains is collecting and gathering train data from its source. 
* Pre-computing Isochrones: Before you use the map, the system calculates (pre-computes) the travel times and areas you can reach in advance.

_Storing and Displaying Isochrones:_

* GeoJSON: This is a format for encoding geographic data. The isochrones are stored in this format.
* Served on Hover: When you hover your mouse over a station on the map, it shows the isochrones (areas you can reach within a certain time).

### Possible use cases

While originally used to plan trips, Chronotrains can be repurposed for open-source investigations. 

This can aid open-source investigations with a time-sensitive location element. 

It can be used to:

* Potentially verify travel claims: By entering a location and timeframe, investigators can see if a reported train travel aligns with what's realistically possible.
* Potentially track movement patterns: Analyze potential routes and locations reachable by train within a specific timeframe, helping identify areas a person of interest might have visited.

## Cost

* [x] Free
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