Topogram

Topogram is a web-based app to visualize the evolution of networks over time and space.

Try it online at app.topogram.io or install your own.

Features

• Time-based navigation in graph
• Network layouts + geographic data
• Online/real-time data update via API

Input data

Currently, the simplest way is to input data is to use the Python API client to push data directly into the database.

from topogram-python-client import TopogramAPIClient

topogram = TopogramAPIClient("http://localhost:3000")

# create a new network
topogram.create_topogram("Awesome viz of geo-time network")

# add data
r = topogram.create_nodes(topogram_ID, [...nodes])
r = topogram.create_edges(topogram_ID, [...edges])

Data format

Nodes

You can add geographic and time information to the nodes.

Name	Type		Description	Example
id	String	required	Id of the node. Should match node Id provided to the edges	'My node 1'
name	String	optional	The name of the node	'Michael'
lat	Float	optional	Latitude (in degrees)	-6.7589
lng	Float	optional	Longitude (in degrees)	105.8671
start	Date	optional	Date when the node started existing	2015
end	Date	optional	Date when the node stopped existing	2012
color	String	optional	Color of the node	'#555000'
weight	Float	optional	Weight of the node	4
group	String	optional	Some category to classify the node	'male'
notes	String	optional	(Markdown) Additional info about the nodes	'# Title'

See the model in /imports/api/nodes/Nodes.js

Example of mapping using the Python API Client :

  node = {
    "id" : str,
    "name" : str,
    "lat" : float,
    "lng" : float,
    "weight" : float,
    "start" : datetime,
    "end" : datetime,
    "notes" : str
    }

Edges

Edges require a source and target. When source node or target node are absent from the data, the edge will be ignored.

| Name | Type | | Description | Example | |--- |--- |--- |--- | | source | String | required | Id of the source node (required) | 'My node 1' | | target | String | required | Id of the target node (required) | 'My node 2' | | id | String | optional | Id of the edge | 'My edge 1' | | name | String | optional | The name/label of the edge | 'Loves' | | start | Date | optional | Date when the edge started existing | 2015 | | end | Date | optional | Date when the edge stopped existing | 2012 | | color | String | optional | Color of the edge | '#555000'| | weight| Float | optional | Weight of the edge | 4 | | group | String | optional | Some category to classify the edge | 'male'| | notes | String | optional | (Markdown) Additional info about the edge | '# Title' |

See the model in /imports/api/edges/Edges.js

Example of mapping using the Python API Client :

  edge = {
    "source" : str,
    "target" : str,
    "weight" : float,
    "notes" : str
    }

Visualization

Once you have created your topogram, it will be available at the list at the address /topograms of your server. You can click on the title to access

Panel Selector

The main visualization is divided between 3 panels :

• network graph
• geographical map
• timeline

You can toggle each of these panels by using the panel selector. When no geo or time element are detected, the checkboxes are disabled automatically.

Side menu

By clicking on the title, you can access the main menu to manipulate and edit your topogram.

Map background

Change the tiles of the map according to your needs.

Network layout

Different layouts are available to display your graph. Try different options to see what fits you best.

Node Radius

Different options are available to display the nodes. It can used the degree of the node in the graph or a user-defined weight (if you assigned it in the data).

Selection mode

When the selection mode is activated, you can click to highlight specific elements of the graphs.

Download & Install

You need Meteor JS to install Topogram.

git clone https://github.com/topogram/topogram-client.git
cd topogram-client
meteor npm install
meteor