New blog post by Tim Appelhans: State of the (open source) web map – Part I: The base(map)

A thoughtful dive into the open source web mapping tools. Recommended.

Read here: https://tim-salabim.codeberg.page/sotwm/sotwm.html

Suuper pre-print from the big guys in spatial data and analysis: "Spatial Data Science Languages: commonalities and needs"
A great and almost necessary read if you work with spatial data. https://arxiv.org/html/2503.16686v1 #GIS #GISChat

ayayay!
"tmap.mapgl: two new tmap modes: mapbox and maplibre"

https://r-tmap.github.io/tmap.mapgl/
#rstats #RStatsCommunity #GISChat

Unofficial public transport maps: “@larstransportworld” is a project by a transport planner passionate about #train-travel and #mapdesign, offering a growing collection of unofficial #publictransport maps for European countries. The maps cover a wide range of services with...
https://spatialists.ch/posts/2025/05-04-unofficial-public-transport-maps/ #GIS #GISchat #geospatial #SwissGIS

Howdy #gischat folks - I'm seeing a lot of #AGOL maps lately with "cartoony" borders for political boundaries like states and counties. They look hand-drawn, with lots of obvious gaps and tilts. But they appear so often that I suspect there's a common source.

There's nothing "wrong" with them usually, because they are effective to convey the information at the typical scale. But they bug me just from an aesthetic perspective. Anyone know the source(s)?

Oh bei #Wikidata Coordinate Me 2025 kann man helfen die Koordinaten für allerlei Dinge zu finden
https://m.wikidata.org/wiki/Wikidata:Events/Coordinate_Me_2025/de

Done mapping all 20 #barangays of Rosario, Cavite, #Philippines in #OpenStreetMap, creating their #Wikidata items, and linking the two with each other.

Wanna play around? Here is the Overpass Turbo query: https://overpass-turbo.eu/s/23my

And here is the Wikidata Query Service (WDQS) query: https://w.wiki/DySX

Previously: https://en.osm.town/@seav/114262897070010378

My job is moving more of their stuff from legacy systems and paper-based workflows to digital, and I think that's probably a good thing.

But. They're asking *me* to do it. And they want me to use our *Esri* stuff.

When I think about how deep into Esri software we are as a County, and how much of that I have personally facilitated, I don't like how I feel.

Wish I was proficient enough in alternatives to start turning things around, but that's a ways off, I think.

CaGIS Vol 52 Issue 3 is now out! Check out all our articles at https://www.tandfonline.com/toc/tcag20/52/3, and the thread below for more details: #GISchat

Network simplification in Python: #neatnet, a new #Python package from @martinfleis, @anavybor, and @JamesGaboardi offers promising functionality for #network simplification.
https://spatialists.ch/posts/2025/04-29-network-simplification-in-python/ #GIS #GISchat #geospatial #SwissGIS

#QGIS folks: any tips for creating balanced zones/territories?
I’m after an algorithm or plugin that can partition areas into regions of roughly equal size and equal potential (population, sales, etc.) based on underlying layers.

Pointers, docs, or workflows welcome!

NOAA/NGS and CGS are "finishing" (after many delays) the "Modernization of the National Spatial Reference System". That includes new systems like NATRF2022 and NAPGD2022.

Using the data they publish as "alpha" I did an auxiliary database for PROJ in https://github.com/jjimenezshaw/NSRS-2022-PROJ (but not inside PROJ project ;)

It is for testing purposes only. Enjoy it.

has anyone got insights into getting the Earth Explorer tool from USGS to let you download historic aerial imagery?

I've been wrestling with incomplete downloads for more than a week now

and while I'm sure some of it is our underpowered server, I think there's some issue on the USGS end as well -- it's showing things as in my download that just don't appear when I unzip the resultant files

(this is after their "maintenance" a couple weeks back, of course )