@postholer

GIS, Interactive & Printed Trail Maps, Data Books, Trip Planners, Snow, Wildfires, Gear Lists, Open Source. Portfolio: https://xitter.cf/t.co/tARZ3syM4P

 Crescent City, California, USA
postholer.com
Joined April 2009
  • Tweets2K
  • Following188
  • Followers787
403Media
Postholer - GIS Resources retweeted
Joshua Stevens@jscartoOct 21
Phosphor now supports qualitative palettes. It includes my own presets that are mathematically designed to maximize visual differentiation, as well as common palettes from ColorBrewer and Tableau. And each is editable, shareable, and exportable.
3
17
822
Monitor water year and month-to-date precipitation as the winter unfolds on an interactive map. Updates daily. Will #ElNino impacts be hype or reality? Follow along: femafhz.com/map/37.727701/-1… You can see intense tropical storm moisture impact in the image. #NCEP
89
Just updated our land cover/fire recovery charts (added 2024/2025) for 26 trails:
Postholer - GIS Resources@postholerSep 18
Replying to @USGS_EROS
As a side note, charting land cover change in fire recovery areas. Example, 2009 Station Fire 67% evergreen cover to 0%, with almost no recovery in 16 years, along linear feature #PacificCrestTrail. Grasses, then shrubs dominate: postholer.com/map/Pacific-Cr… Available for 26 trails.
2
124
#Hurricane risk and the west coast: femafhz.com/map/29.502798/-1…
1
83
Busy, busy, busy. #Edouard #Marie #Karina #Lowell femafhz.com/map/27.992672/-1…
1
2
531
All those saps that bought into the DuckDB hype, who are now dependent on it, get to pay Amazon for the privilege.
Bert Temme@berttemmeAug 26
AWS to acquire DuckLabs, the Amsterdam-based company behind DuckDB aboutamazon.com/news/company…

AWS to acquire DuckLabs, the Amsterdam-based company behind DuckDB

Amazon has announced it has signed a definitive agreement to acquire DuckLabs, the Amsterdam-based company behind the open source analytical database DuckDB.

aboutamazon.com
1
1
218
2026 #Wildfires as of Aug 17. Gray areas are burn scars.
1
147
Postholer - GIS Resources retweeted
Phys.org
@physorg_comAug 18
420 km of optical fiber now links two entangled quantum memories, more than four times the previous memory-based record, using atom clouds that never physically touch. @physrevlett @arxiv phys.org/news/2026-08-physic…

Physicists entangle quantum memories across a record-breaking 420 km

Optical fibers are already the backbone of global communication systems. Recently, however, physicists have started to explore how their functionality could be boosted further by conveying informat...

phys.org
2
13
1
54
7,483
El Nino/La Nina snow impact on the sierra in California for DJF and JFM periods, 2004-26. Avg based on Apr 1. The top 10 snow years averaged -0.28 or mild Nina. The biggest snow year, 22-23, was -0.86 mild/moderate Nina. @WeatherProf @Weather_West #ElNino #SNODAS #ggweather
1
1
1
2
390
As of this morning, Oregon is scorching the way for wildfires this season (so far). Utah is a very distant second: #wildfires #oregon @US_Stormwatch @Weather_West
1
3
515
The following creates a spatially indexed @flatgeobuf (FGB) of @USGSLandsat ARD #metadata by polygon. It accesses over 2.3 million rows (currently). 1982 to present. It is blazing fast and does not require an API or complex client stack. postholer.com/portfolio/note… #GIS
1
4
844
Tropical storm Elida and sea surface temps: femafhz.com/map/27.916767/-1… Change the layer to sea surface anomaly to visualize how temps are compared to normal. Sea surface temps are actually below normal for a large swath near the California coast. @US_Stormwatch
142
Create a median composite raster from Sentinel-2 using only @GdalOrg This tutorial achieves the same result as @spatialthoughts Python tutorial, using only GDAL and Bash, without Python and it's dependencies. postholer.com/portfolio/note…
Sentinel-2 median composite raster of Bengaluru, IN.

ALT Sentinel-2 median composite raster of Bengaluru, IN.

1
7
1
56
3,214
Pssst! Hey extremists. Yeah, you. Whether you're red-hat-wearing MAGA traitor or a hamas loving Woke revolutionary, a message for you. Your vitriol directed toward Lindsey Graham says everything about you and nothing about the deceased. #moderate #civility #reason
1
1
156
ArcGIS analysts without a mouse.

ALT ArcGIS analysts without a mouse.

1
88
Creating multi-layer images with GDAL CLI pipeline, using various nested raster/vector pipelines. Data: ETOPO_2022 1KM resolution bathymetry/elevation, NaturalEarth and personal trail vector data. @GdalOrg @gdaltips #gis #bash
1
6
327
Postholer - GIS Resources retweeted
TechXplore@TechXplore_comJun 20
A shake-powered capsule inactivated 99.9999% of bacteria and viruses in up to 4 liters of water, while also checking conductivity to judge whether disinfection should begin. techxplore.com/news/2026-06-…

Shake-powered capsule tests and disinfects unsafe drinking water

It is a sobering fact that in the 21st century, 1 in 4 people still lack access to safe, clean drinking water, according to the World Health Organization (WHO). The figures increase slightly during...

techxplore.com
4
12
2,679
Since El Nino was officially declared today, here's a ZERO hype reminder of how little it impacts Sierra Nevada snow pack in California over the last 23 years. In fact, La Nina clearly has a greater impact. @BenNollWeather @WeatherProf @Weather_West @RyanWeather
Postholer - GIS Resources@postholerMay 31
More evidence against El Nino hype. Looking at the last 22 years, there's no evidence strong/moderate El Nino contributes to wetter weather. Only 2 of the top 10 years were moderate. 6 were Nina's!!! The opposite seems to be true in a changing climate. bsky.app/profile/postholer.c…
105
Our trail fires page is ready for the upcoming fire season. We've added video that shows smoke, hotspots, burn scars and fire weather index over the last 72 hours, in 1 hour increments. Choose your trail. postholer.com/trail-fires
48
More evidence against El Nino hype. Looking at the last 22 years, there's no evidence strong/moderate El Nino contributes to wetter weather. Only 2 of the top 10 years were moderate. 6 were Nina's!!! The opposite seems to be true in a changing climate. bsky.app/profile/postholer.c…
1
1
227
Load more