The Answer You Didn't Want: Fiskardo Evacuation Routing
During a wildfire, how long does it take to move people out of Fiskardo by road? That was the question. It sounds like a database query, because it…
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Location King: геогессер на спутниковых снимках
Геогессеры обычно строятся на панорамах улиц: вид с земли, а вы ищете вывески, дорожные знаки, номера машин. Работает, но угадываете вы в итоге по н…
One Gigabyte per Survey, of Which 108 KB Goes in the Database
Here is the disk layout of one mobile mapping survey — a vehicle with a LiDAR scanner and a panoramic camera, driven along a road: data/001_MMS/ 507…
One View Per Layer: Four Sharp Edges I Found in My Own Code
There is a layer in my database called 1 . Somebody created it, presumably by accident, and it sat there for months looking harmless. It was the onl…
Same Zone, Same Projection, 427 Metres Apart
I was writing a blog post about the architecture of a system I built when I found a bug in it. This is that bug, and the much more interesting thing…
We Publish the Data Before It's Correct. On Purpose.
Someone asks for yesterday's maximum temperature in Belgrade. We don't have it. We won't have it for another four days, and when we do have it, the…
Building an Open-Source NOAA MRMS Radar Renderer in Python
When I started building Weather Experience , I wasn't planning to release an open-source project. I simply wanted to answer a question: Could I buil…
Why your Valhalla turn-by-turn distances are wrong: a distance-axis mismatch
Originally published on my site . I build an offline motorcycle navigation app. It routes on-device with Valhalla , snaps the rider's GPS onto the r…
🚀 India Village Finder Introduces Farmer Schemes & Farm-Input Insights
Village Finder is an open-source, serverless, and multilingual map tracking over 78,000 villages across Andhra Pradesh, Telangana, Karnataka, and Ta…
Какой кригинг выбрать: простой, ординарный, с трендом, блочный, индикаторный
Мы создаем софт для горно-геологических служб калийных рудников, и после первой статьи про [кригинг на чистом NumPy]( https://habr.com/ru/articles/1…
How to Geocode Thousands of Addresses for Free
Geocoding large address datasets (finding latitude and longitude coordinates for addresses) can quickly become expensive, especially when you need t…