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RDMO – Research Daten Management Organizer

RDMO is a tool to support the systematic planning, organisation and implementation of the data management throughout the course of a research project. RDMO is funded by the Deutsche Forschungsgemeinschaft (DFG).

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An installation of RDMO contains of three parts:

  1. A directory which holds all the settings and customisations, custom to your installation of RDMO. We will call this directory rdmo-app, but you can use any name you see fit.
  2. The actual rdmo package, which is centrally maintained by the RDMO team, is installed as a dependency in a virtual environement.
  3. A database to store the content, which is generated by the users of your RDMO installation. Currently, we support Postgres, MySQL, and SQLite.

This chapter shows how these components are set up. Optional components can be installed afterwards and are covered under Configuration.

For testing and development, you can run RDMO using your regular user account. On a production system, a dedicated user account should be used. We suggest to create a user called rdmo with the group rdmo and the home directory /srv/rdmo: sudo adduser rdmo --home /srv/rdmo . We will use this user throughout this documantation.

Do not use the root user to run RDMO! It is a bad idea anyway and several steps of the installation will not work. sudo is used in the installation when needing root-privileges to install packages.


Basic Introduction

React Leaflet provides bindings between React and Leaflet. It does not replace Leaflet but leverages it to abstract Leaflet layers as React components.

React Leaflet uses React’s context API to make some Leaflet elements instances available to children’s elements that need it.

Each Leaflet map instance has its own React context, created by the MapContainer component. Other components and hooks provided by React Leaflet can only be used as descendants of a MapContainer.

Lifecycle process

  1. The MapContainer renders a container <div> element for the map. If the placeholder prop is set, it will be rendered inside the container <div>.
  2. The MapContainer instantiates a Leaflet Map for the created <div> with the component properties and creates the React context containing the map instance.
  3. The MapContainer renders its children components.
  4. Each child component instantiates the matching Leaflet instance for the element using the component properties and context, and adds it to the map.
  5. When a child component is rendered again, changes to its supported mutable props are applied to the map.
  6. When a component is removed from the render tree, it removes its layer from the map as needed.


’npm‘ can be used to install React leaflet and its dependencies.

React, React DOM and Leaflet are required peer dependencies. We must add them to our project if they are not already installed:

npm install react react-dom leaflet

Then we can install React Leaflet:

npm install react-leaflet

Modules can then be imported using bare specifiers when supported by a bundler such as webpack

import { MapContainer } from ‚react-leaflet/MapContainer‘
import { TileLayer } from ‚react-leaflet/TileLayer‘
import { useMap } from ‚react-leaflet/hooks‘

Alternatively, all the components and hooks can be imported from the module entry-point:

import { MapContainer, TileLayer, useMap } from ‚react-leaflet‘


Use the following code:

<MapContainer center={[51.505, -0.09]} zoom={13} scrollWheelZoom={false}>
attribution=’&copy; <a href=“https://www.openstreetmap.org/copyright“>OpenStreetMap</a> contributors‘
<Marker position={[51.505, -0.09]}>
A pretty CSS3 popup. <br /> Easily customizable.




Example to visualize multiple locations with markers


return (
    <div style={{ height: ’50px‘ }} id=“map“>
      <MapContainer center={[51.505, -0.09]} zoom={13} scrollWheelZoom={true}>
          attribution=’&copy; <a href=“https://www.openstreetmap.org/copyright“>OpenStreetMap</a> contributors‘
          markerData.features.map((data) => {
            return (
              <Marker position={[data.geometry.coordinates[1], data.geometry.coordinates[0]]}>
        <LocationMarker />



Still having trouble? Use the react-leaflet tag on Stack Overflow. 😉





React.js frontend und PHP backend


„Now can we use React js with Php ?

Yes. This is possible. Reactjs is just the ‘V’ in MVC. React doesn’t care what you are using at backend. One can render React’s components on server side in PHP using V8Js PHP extension, but this is not necessary. Server side rendering in Reactjs is optional. Here are some things you can do:
1. Compile your whole reactjs JSX code using babel. It would be better if you make use of some module bundler like webpack and compile your reactjs code into a single file. Upload that single file on your server.
2. You can populate default states in your react code using php.
The best way to use PHP as backend with React Js as front end is to keep both seperate. Make a stand alone front-end and use PHP to create APIs which interacts with the database. Then consume the API through HTTP AJAX or whatever mechanism React Js contains.

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