Don’t panic, it’s just public transit data

In the beginning the GTFS standard was created by Google. This has made a lot of people very angry and has been widely regarded as a bad move.

Since its release in 2004, the General Transit Feed Specification (GTFS) has revolutionized the way we work with public transit data. It defines a common format for public transportation schedules and associated geographic information. A GTFS feed is composed of a series of text files collected in a ZIP file. Each file models a particular aspect of transit information: stops, routes, trips, and other schedule data.

Image classification with Google Earth Engine for the UN

For many years now, my experience as a GIS and remote sensing specialist has been marked by projects in the humanitarian sector: the UN, World Bank, Red Cross, WRI, Translators without Borders; you name it, I probably did some work for them. Back in 2018, when I worked for Urban Resilience Platform — a French startup dedicated to developing software for solid waste management in humanitarian crises — , we were given a very simple but hard to accomplish task: help UNDP and the Turkish government identify every illegal dumpsite in Turkey.

But why, though?

Turkey’s unique geographic position with a 911 Km…

A practical take on Ian McHarg's suitability analysis method.

The year of 2019 marked the 50 year anniversary of Ian McHarg's influential book, Design with Nature. I was first introduced to this book back in 2013, and no book has made a deeper impression in me since.

Back in 1969 when it was first published, the environmental movement was popping all over the world. The 1970s and ’80s were the time of landmark legislation surrounding ecological concerns, and McHarg argued that landscape architecture alone was able to integrate all the fields involved. The book's techno-utopian ideas of fitness, suitability, and the ability of data to reveal the “right” answers…

A hands-on guide for implementing some of the most beloved tools in the spatial python community

Over my career I’ve worked on many geospatial related projects using the ArcGIS platform, which I absolutely love. That means I get to consult in projects with cutting-edge geospatial technologies, like Multidimensional Rasters, Deep Learning, and spatial IoT automation. With that in mind, I always try to keep track of how to perform the same operations I’m working on without Esri’s beautifully crafted systems.

Over the last few weekends during an exceptionally tedious quarantine I've worked on this little script that would reproduce something I've been developing with ESRI's Living Atlas to achieve NDVI Zonal Statistics (Normalized Difference Vegetation Index

As someone who has worked in many fields and positions accross companies in geospatial — from urban planner to digital product manager — , I can say I've been around. I often had to learn a lot about specific subjects before I could tackle the task I was given, be it hydrodynamic modeling, stakeholders engagement or remote sensing scripts. In this article, I cover very basic knowledge on python for geospatial related flows that I had to learn quickly.

I was recently faced with a new challenge when one of my teachers from university invited me integrate his team at…

Nesse mapa espaço-temporal que chamamos de Quem falou em Zika? representamos todos os tweets sobre o Zika Vírus, de Janeiro de 2007 a Fevereiro de 2016.

O Zika é um vírus transmitido pelo mosquito Aedes aegypti e identificado pela primeira vez na America do Sul em 2007, mas a maior epidemia já registrada ocorre atualmente no Brasil. Grande parte da infestação do mosquito e das doenças decorrentes são notificadas em bairros pobres e periféricos em função de problemas na área do saneamento: água, esgoto, drenagem fluvial e coleta de resíduos sólidos. Essa situação oferece a condição ideal para a reprodução…

foto: Edouard Ducos

Promovido pelo Ministério Francês do Meio Ambiente, da Energia e do Mar, o Hackathon #HackRisques aconteceu em Paris no último fim de semana de novembro. Um de nossos sócios-fundadores participou da equipe Be Waste Resilient, que apresentou um protótipo de WebSIG para gestão de resíduos sólidos, levando pra casa o prêmio de terceiro lugar!

O que é esse mapa?
O que você está vendo é um mapa interativo da distribuição populacional no Brasil. Nele você vê espaços de até 1km² onde a população recenseada é igual a zero em 2010. Esse dado é fornecido pelo Censo Demográfico 2010 do Instituto Brasileiro de Geografia e Estatística (IBGE).

Resumidamente, o mapa foi gerado selecionando todas as áreas da grade estatística nas quais a informação de quantidade de residentes era igual a zero, desconsiderando corpos d’água como lagos e rios. Os dados desagregados do IBGE que dão origem a estes “quadrados” são muito mais precisos, no entanto…

Guilherme M. Iablonovski

Geospatial Data Scientist and Developer. GIS , sustainable urban planning, environment, data science and software development.

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