Geodata Blockchain
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Welkom to the Deltares 'Building a Blockchain' portal!

Blockchain technology is a disruptive innovation. It is a transparent, secure and distributed ledger that can be used to register all kinds of transactions, without the need for a middleman. Cryptocurrencies are the best known examples. They offer a safe means for payments on the internet, without the need for a bank. One of the pillars of blockchain is that it creates trust, giving distributed control over the content to all its participants. With this poratl we use subsidence in Gouda as a proof of concept for applying blockchain technology. Deltares is active in several projects in the region with numerous stakeholders and it enables us to join initiatives such as the Living Lab Land-subsidence Gouda. This portal hosts a private blockchain to provide a fixed number of stakeholders access to a limited dataset and its associated workflow and gain experience with this new technology. Every stakeholder will have full access to the data and in addition there will be an interface presenting data integrity, showing who has submitted and accessed the data and if the data were processed and or edited. Such actions will be authenticated, verified and registered on a local node that is under control of the stakeholders. This provides full insight and control on the data provenance and processing.

It is our expectation that this will increase the trust in the acquired and processed data with all stakeholders.



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Wekelijks rapport:

Toon wekelijks raport met daarin een overzicht van alle Blockchain bestanden met een hash die afwijkt van de Wareco waarde.

Selecteer datum voor Blockchain selectie:

Selecteer een datum om te zien welke bestanden beschikbaar zijn op de Blockchain voor die dag.

Eenmaal per dag worden voor alle Wareco peilbuis en alle parameters de dagwaarden uitgelezen.
De resultaten worden opgeslagen in het bestand dat te vinden is in de kolom 'Blockchain bestand'.
Van ieder bestand wordt de hash waarde (SHA256) afgeleid en geregistreerd op de Blockchain.

Transaction table
Blockchain bestand
Wareco bestand

Blockchain informatie voor 'Blockchain bestand' uit geselecteerde rij

Toegevoegd aan Blockchain
Hash (unique code bestand)

Hash waarden van Blockchain en Wareco bestanden uit geselecteerde rij

Hash Blockchain
Hash Wareco

Laad zelf een bestand en vergelijk met 'Blockchain bestand' uit de geselecteerde rij

Hash Blockchain
Hash Geüpload

Join the 'Building a Blockchain' project

One of the strength of the Blockchain is that it is open and transparent. All stakeholders can participate by setting up their own block chain instance and connecting to the 'Geoblockchain' project.

Follow the steps below (in Dutch) to setup your own MultiChain instance. These steps can also be downloaded here:

Installatie stappen

Dit is de instructie voor het installeren van een node die mee doet in de Geoblockchain van Deltares en Xurux. Het resultaat is dat u een werkende node heeft in een virtuele machine op uw PC.

Stap 1
Download de virtuele machine. Haal deze op van de server van de Geoblockchain
Plaats het bestand geo-blockchain-3.ova op uw lokale harde schijf door het te kopiëeren. Let op het is een groot bestand! Zorg voor voldoende harde schijf ruimte ( 1 GB).

Stap 2
Download de software om een virtuele machine mee te starten.
- Ga naar
- Kies de Virtualbox voor uw operating system. Dit is het operating systeem van uw lokale machine.

Stap 3
Installeer de VirtualBox software door het .exe bestand dat u heeft gedownload te starten. Volg de instructies van de installatie.

Stap 4
Dubbelklik het geo-blockchain-3.ova bestand. De Virtualbox software zal nu starten en een scherm tonen met de mogelijkheid de virtuele machine te importeren. Importeer de virtuele machine en accepteer de default waarden.

Stap 5
Selecteer de virtuele machine binnen VirtualBox en klik op start in het menu bovenin (Groene pijl) of dubbel click de virtuele machine (geo-blockchain_3).
Er verschijnt een scherm met een login. Daar hoeft u (nog) niks mee te doen. Het zal enige tijd duren voordat de virtuele machine klaar is met opstarten. Dit hele proces vindt op de achtergrond plaats. U hoeft daar niets voor te doen behalve wachten. Waarschijnlijk is 10 minuten genoeg. Het proces is klaar als u de localhost in de volgende stap kunt benaderen en de Multichain blockchain explorer kunt zien.

Stap 6
Als het allemaal goed is gegaan kunt u in uw internetbrowser naar http://localhost:2750 gaan om uw blockchain node te zien via de Multichain blockchain explorer.

U kunt ook inloggen op de virtuele machine door bij de loginprompt 'root' te typen en als password 'geo' te gebruiken. U komt dan in de virtuele machine. Dit is een Ubuntu Linux machine. Dit heeft alleen zin als u Linux kent. U kunt er weer uitgaan door het woord 'exit' te typen.