Author: Lucas Jellema
Quickly creating a geo-map illustration for an article. Showing off PDOK as geo data source, QGIS as geo data inspector and editor and Datawrapper to create the actual map. …
In this article I take a custom GeoJSON file that defines some 20 custom locations – the office locations for the Conclusion ecosystem – and process it in the …
PDOK – Publieke Data op Kaart – is a Dutch data service that offers 230+ geo data sets on many different aspects of the public space in The Netherlands. …
Leaflet is a great JavaScript library for creating map visualizations in web applications. Leaflet is created with that specific purpose in mind. It caters for most of the things …
Using QGIS to gather, visualize, analyze, edit, process and export Geo Data is fun. I only discovered QGIS fairly recently. And now of course I see it popping up …
Last month we organized an internal competition around The Advent of Code 2023. Some 70 colleagues participated, Six had completed all puzzles at New Year’s Eve Midnight – our …
In a recent investigation I stumbled on two valuable things: the free QGIS desktop tool that allows inspection, transformation and analysis of Geo data the ProRail ArcGIS Map Server …
My challenge: show Dutch rail tracks on a map. This challenge is composed of several steps: find a dataset that contains geographic data on Dutch railways convert that data …
The combination of GeoJSON data sets and the JavaScript d3.js for SVG visualizations is quite valuable for creating rich and interactive visualizations of data that is related to geography …
In several recent articles on Data Visualization using a Thematic World Map with color shades assigned to countries based on their value for a specific property in a world …
In two earlier articles I have discussed how to create a data visualization through a world map showing countries colored in shades representing their value for a selected property. …
This article is a sequel to my introduction into World Map visualization (using d3, SVG and JavaScript). The previous article introduced the visualization of country specific data on a …
Data associated with countries is fairly common. Presenting such data in the form of world map that shows the countries and presents the associated data through a color is …
B2b, B2C, Application-2-Application integration – I have been active in data integration scenarios for many years. Typically real time, high volume and increasingly asynchronous. And virtually always fully automated. …
Just over three weeks ago, a colleague told me about The Advent of Code 2023. She explained how for 8 years every year in days and weeks leading up …
The production database is the holy grail of any organisation or at least any microservice or business application. The data and the current structures and definitions of the database …
I have created a tutorial “Building a web application with Vue”. You will find it here in a GitHub Repo. It is targeted at people who – like me …
If I had not seen it, I doubt I would have believed it. If you click this link you will open a StackBlitz workspace right in your browser. You …
Ik maak met enthousiasme gebruik van OV9292. Ik geef aan waar ik wil zijn en waarvandaan ik ga reizen. Ik geef aan hoe laat ik wil vertrekken of aankomen. …
Speaker: Lucas Jellema (four weeks of Vue3 experience)Language for this session: EnglishDate: Tuesday 22nd AugustTime: 17.00-20.30 CET Location: Conclusion Utrecht, Herculesplein 80, 16th floor / Digital via Teams Target …
I started web development in the ’90s. Plain HTML and JavaScript, some images and perhaps a little bit of CSS. Static websites. I have made quite a journey since …
Dit is een verhaal over mijn ervaringen als klant van een leasemaatschappij. Of misschien als belanghebbende (want mijn werkgever is de klant). Een verhaal op twee niveaus: de klantervaring …
Platys is a tool created by Guido Schmutz, architect and data specialist at Accenture and frequent teacher at various universities. In order to be able to quickly create an …
That is a long title. In this article, I introduce a Gitpod workspace (cloud based ephemeral development environment) in which you can try out NocoDB – an open source …
Click on a button- or this link. Wait about four to five minutes. You will have access to a free cloud based environment with a three-broker-node Apache Kafka Cluster, …
The core Formula One data could be represented in a graph like this: Drivers compete in races that are hosted on circuits. A result is achieved by the driver …
I bet you are used to relational data structures that you query using SQL. And so do I. And there is nothing in terms of data that a good …
My fellow Oracle ACE Directors and former AMIS-colleagues Patrick Barel and Alex Nuijten have co-authored an impressive book: The book discusses many of the wonders of SQL and PL/SQL …
In an earlier article, I showed how to quickly get going with an Oracle Database 23c Free instance in a Gitpod workspace – cloud based, ephemeral, quick start, zero …
This should surprise if not baffle you. Session 1 inserts a record and commits it. Session 1 performs an update on this record. And does not yet commit its …
A new major Oracle Database release is a special occasion. I joined Oracle in May 1994 just after the Oracle7 release (December 1993) although I worked with Oracle6 for …
Op maandag 20 maart vindt weer een Code Café plaats waarin we tools en technologie bespreken en uitproberen. Tussen 17 en 20.30 staan drie onderwerpen op de agenda, eten …
I am not normally a cynic. I trust people’s good intentions. However, I am a little suspicious when an argument in favor or against a specific way of doing …
I have written about Steampipe before. And I have stated how much I like this idea of using SQL to access data on cloud resources (and many other types …
In addition to the OCI Console, there are many ways to inspect the status of Oracle Cloud resources – including the OCI CLI, Terraform, Grafana OCI Plugin, REST API, …
Apache Superset is an open source end user tool for analyzing and visualizing data. Dozens of chart types are available out of the box, dashboards can be created, finetuned …
Apache Superset is an open source platform for data exploration and visualization. It can be described as an open, free alternative for Microsoft PowerBI, Tableau, Qlik and Oracle Analytics …
Oracle Cloud Infrastructure DevOps is a service I have written about on several occasions. The OCI DevOps service provides an Artifact Repository, Git Code repositories, Build Pipelines and Deployment …
Triggered by an assignment my son had to do for one of his university courses – and given the fairly light weight laptop we have him work with – …
ChatGPT is a bit of a “tongue twister” so I will speak of Cheppy. AMIS has a long history of spotting, exploring, embracing and rolling out new concepts and …
