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Postholer - Hiking & GIS

@postholer.com
1.5K followers 383 following 394 posts

GIS, Interactive & Printed Trail Maps, Data Books, Trip Planners, Snow, Wildfires, Gear Lists, Open Source, GDAL Evangelist. www.postholer.com, cloudnativemaps.com, femafhz.com

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Reposted by Postholer - Hiking & GIS
tomwellborn3rd @wellborn.net · 22h
The Las Playas Intaglio is a 272-foot fish carved into the Arizona desert 6,500 years ago, older than Stonehenge, the oldest geoglyph in the Americas. It survived every civilization on 2 continents. In April a border wall contractor scraped a 50-foot path through it. CBP: "inadvertently disturbed."
politimix.substack.com
The Oldest Artwork in the Americas Survived 6,500 Years. Then It Met a Border Wall Contractor.
The Las Playas Intaglio, a 272-foot fish older than Stonehenge, lasted through every civilization on two continents until a crew with heavy equipment scraped a 50-foot path through it in April.
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Postholer - Hiking & GIS @postholer.com · 18/09/2026
Updated our land cover/fire recovery charts (added 2024/2025). Example, 2009 Station Fire 67% evergreen cover to 0%, with almost no recovery in 16 years, along linear feature #PacificCrestTrail. Grasses, then shrubs dominate: www.postholer.com/map/Pacific-... Available for 26 trails.
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Postholer - Hiking & GIS @postholer.com · 26/07/2026
As of this morning, Oregon is scorching the way for wildfires this season (so far). Utah is a very distant second: #wildfires #oregon
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Postholer - Hiking & GIS @postholer.com · 22/07/2026
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. www.postholer.com/portfolio/no... #GIS
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Postholer - Hiking & GIS @postholer.com · 18/07/2026
America First. The U.S. is the largest producer of oil in the world. So why are gas prices so high in the U.S.? Because energy companies honor their highly profitable foreign contracts before the needs of Americans. So, um, yeah. America First. Thanks Don.
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Postholer - Hiking & GIS @postholer.com · 17/07/2026
Stay up-to-date with the latest #surfaceSmoke conditions and air quality with this interactive map. Updates hourly: www.femafhz.com/map/39.74098... #wildfire #smoke #airquality
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Postholer - Hiking & GIS @postholer.com · 17/07/2026
Tropical storm Elida and sea surface temps: www.femafhz.com/map/27.91676... 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. #tropicalStorm #hurricane #elnino
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Postholer - Hiking & GIS @postholer.com · 16/07/2026
Create a median composite raster from Sentinel-2 using only #GDAL This tutorial achieves the same result as #spatialthoughts Python tutorial: courses.spatialthoughts.com/python-remot... ...using only GDAL and Bash, without Python and it's dependencies. www.postholer.com/portfolio/no...
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Postholer - Hiking & GIS @postholer.com · 13/07/2026
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.
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Postholer - Hiking & GIS @postholer.com · 12/07/2026
You know it's true...
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Postholer - Hiking & GIS @postholer.com · 22/06/2026
Creating multi-layer images with GDAL CLI pipeline, using various nested raster/vector pipelines. Data: ETOPO_2022 1KM resolution bathymetry/elevation, NaturalEarth and trail vector data. #gis
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Postholer - Hiking & GIS @postholer.com · 11/06/2026
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. www.postholer.com/trail-fires
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Postholer - Hiking & GIS @postholer.com · 31/05/2026
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.
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Postholer - Hiking & GIS @postholer.com · 29/05/2026
Sierra Snow animation on May 28th, from 2004 to 2026. www.postholer.com
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Postholer - Hiking & GIS @postholer.com · 14/05/2026
El Nino: Hazard or hype? Social media is awash with "weather wandas" seeking clicks, professing doom & gloom about El Nino. Here's a look over the years of its impact in California, in terms of precipitation.
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Postholer - Hiking & GIS @postholer.com · 09/05/2026
967 distinct eco-regions from the @EPA for CONUS, levels 1-4. That's 5,842 at level 4. Base map turned off for clarity. Zoom in to increase eco-region level. Click for name: www.postholer.com/map/Pacific-...
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Postholer - Hiking & GIS @postholer.com · 27/04/2026
It seems folks are struggling with @fema Flood Hazard (NFHL) data. Create your own spatial database, allowing you to query by FIRMID, FIPS, community id, date, geometry and retrieve data in bulk: postholer.com/portfolio/no... @cloudnativegeo.org @radiant.earth @briannaritapagan.bsky.social
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Postholer - Hiking & GIS @postholer.com · 18/11/2025
Anyone notice a massive increase of bad internet traffic coming from South America over the last few months? Here's looking at you #Brazil: www.femafhz.com/map/-17.9518... #gis #osint
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Postholer - Hiking & GIS @postholer.com · 12/11/2025
GDAL CLI version 3.12.0 is out! #gdal #gis #MtHood
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Postholer - Hiking & GIS @postholer.com · 07/11/2025
Comparison of NBM QPF (precipitation) forecast model vs actual QPF amounts, for 2 events, Oct 24-27 and Nov 04-06 2025 along the California north coast. Consistency is an issue. @nws.noaa.gov #weather #california
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Postholer - Hiking & GIS @postholer.com · 03/11/2025
National Risk Index, Riverine Flooding - Expected Annual Loss Rate - National Percentile shown. Choose category by state, county or census tract #polygons. www.femafhz.com/map/35.13787... #30DayMapChallenge
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Reposted by Postholer - Hiking & GIS
Martin A. Nuñez @martin-nunez.bsky.social · 03/11/2025
a century of glaciers melting 🧪🌐
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Postholer - Hiking & GIS @postholer.com · 01/11/2025
Using PostGIS ST_LineInterpolatePoints to evenly get points from line features (roads) and ST_ClusterDBScan to get (mostly) non-overlapping points for road shields on interactive map. Using only st_clusterdbscan for non-overlaping GNIS place names. #30DayMapChallenge #points #postgis #leafletjs
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Postholer - Hiking & GIS @postholer.com · 09/10/2025
Modern Python:
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Reposted by Postholer - Hiking & GIS
Euronews @euronews.com · 08/10/2025
The authors say it's a sign that renewables can keep up the pace with the growing appetite for electricity worldwide.
l.euronews.com
Renewables overtake coal as biggest global source of electricity
The authors say it's a sign that renewables can keep up the pace with the growing appetite for electricity worldwide.
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Postholer - Hiking & GIS @postholer.com · 06/10/2025
State of California: 4th largest GDP in the *world*. 71% of the U.S. economy originates from blue states. Red states are being *subsidized* by blue states. What a complete embarrassment.
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Postholer - Hiking & GIS @postholer.com · 26/09/2025
Stay tuned! Always current interactive map: femafhz.com/map/33.39475... #Invest94L
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Postholer - Hiking & GIS @postholer.com · 05/09/2025
Per the #PCTA: "The Trump Administration this week formally announced its intention to roll back longstanding protections for Inventoried Roadless Areas in National Forests..." www.pcta.org/2025/scrappi... Map for all trails, layers->Protected Areas->Roadless Areas: www.postholer.com/trail-maps
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Postholer - Hiking & GIS @postholer.com · 04/09/2025
Hmmm....
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Postholer - Hiking & GIS @postholer.com · 28/08/2025
A peculiar whale breaching in the Indian Ocean. ;) x.com/SpaceX/statu...
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Postholer - Hiking & GIS @postholer.com · 20/08/2025
Hurricane #Erin at noon-ish, eastern. It's getting quite large. www.femafhz.com/map/31.24170...
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Postholer - Hiking & GIS @postholer.com · 17/08/2025
California, the 4th largest economy in the world, has a balanced budget, *without a deficit*. Maybe the state isn't just a bunch of idiots after all? x.com/GovPressOffi...
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Postholer - Hiking & GIS @postholer.com · 16/08/2025
Hurricane #Erin intensifies to category 5 in record time. www.femafhz.com/map/26.80446...
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Postholer - Hiking & GIS @postholer.com · 15/08/2025
The northern 3rd of the #PacificCrestTrail is gonna see some significant rain. Get a current forecast and tread carefully! www.postholer.com/map/Pacific-...
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Reposted by Postholer - Hiking & GIS
radams @radamssmash.bsky.social · 08/08/2025
My goto is to ask LLMs how many states have R in their name. They always fail. GPT 5 included Indiana, Illinois, and Texas in its list. It then asked me if I wanted an alphabetical highlighted map. Sure, why not.
A shitty map created by ChatGPT5.  it purports to be US States with an R in their name, but it's wrong and dumb and worthless just like LLMs.
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Postholer - Hiking & GIS @postholer.com · 04/08/2025
Air quality over the U.S. right now is marginalized at best over CONUS. Here's a 'surface smoke' interactive map that updates hourly: www.femafhz.com/map/40.94671...
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Reposted by Postholer - Hiking & GIS
Internet Archive @archive.org · 02/08/2025
Our #livestream runs 24/7. But when the microfiche scanning team takes a well-earned break, the feed keeps rolling, with #lofi music accompanying home movies, silent films & other gems from the Internet Archive. Here's a sample. Tune in ➡️ www.youtube.com/live/aPg2V5R...
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Postholer - Hiking & GIS @postholer.com · 30/07/2025
Since everyone is getting all worked up for no reason regarding a west-coast #tsunami, I'll post an image of Crescent City, CA tsunami evac zones. Being a CC resident, I'll predict this #earthquake will be a non-event. Click the 'evac zones' in the interactive map layers: www.delnorteresort.com
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Postholer - Hiking & GIS @postholer.com · 20/07/2025
Sleeping bag temperature rating: An interactive map What 'season' bag do I need? This map shows 5 ranges: 1,2,3,4 season and extreme, for every month of the year. Here's the @pacificcresttrail.bsky.social for May: www.postholer.com/map/Pacific-... Available for anywhere in the lower 48 states.
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Postholer - Hiking & GIS @postholer.com · 12/07/2025
Camp Mystic building footprints and their placement in FEMA flood zones. Kerr County flood data was last revised on Aug 4, 2022. The vast majority of buildings are in a 'High, Insurance Required' zone, the highest level. www.femafhz.com/map/30.00863...
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Postholer - Hiking & GIS @postholer.com · 05/07/2025
Tropical storm Chantal @noaa.gov, and #FEMA National Risk Index Score, for hurricane, at state level (zoom in for county or tract). www.femafhz.com/map/38.77121...
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Postholer - Hiking & GIS @postholer.com · 08/05/2025
Here are 2 must have links for Weather & Climate data: NOAA OneStop: data.noaa.gov/onestop/ NCEI Data Access: www.ncei.noaa.gov/access/searc... Government data being retired, moved, consolidated is a daily event. Much of it is finding a home above. #gischat #gis #weather #climate
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Postholer - Hiking & GIS @postholer.com · 07/05/2025
Hey @nsidc.bsky.social, no data for the last 2 days in: noaadata.apps.nsidc.org/NOAA/G02158/... Thanks!
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Postholer - Hiking & GIS @postholer.com · 25/04/2025
I reduced web traffic 80% by blocking #googleCloud from accessing my websites. Real user traffic is unaffected.
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Reposted by Postholer - Hiking & GIS
Pacific Crest Trail @pacificcresttrail.bsky.social · 23/04/2025
Viewshed of the entire #PacificCrestTrail. A viewshed is the unobstructed area you can see standing at a given location. A vista, you probably have expansive views. The bottom of a canyon, maybe not so much. www.youtube.com/watch?v=tmY2... There's one for the #JohnMuirTrail, too! #ParkChat
youtube.com
Pacific Crest Trail Viewshed
YouTube video by Postholer
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Reposted by Postholer - Hiking & GIS
geospatialist.bsky.social @geospatialist.bsky.social · 16/04/2025
Each hex is keyed to the max Z value in US elevation it's over. I'm doing another on where they are given the average elevation value instead of max to see how it comes out. #arcgispro #b3d
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Postholer - Hiking & GIS @postholer.com · 08/04/2025
Cloud Native Data formats. A quick cheat-sheet in case you weren't sure... #gischat
A summary of what defines Cloud Native Data, in context of spatial data. It's become a marketing term and not the definition it was intended to be.
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Reposted by Postholer - Hiking & GIS
CNN @cnn.com · 07/04/2025
Hiking the Pacific Crest Trail that runs through three western states is already challenging. Now the grueling journey may become even tougher this year due to federal cuts.
cnn.com
Storms tore up two of America’s most iconic trails. Federal cuts have disrupted repairs | CNN
Hiking the Pacific Crest Trail that runs through three western states is already challenging. Now the grueling journey may become even tougher this year due to federal cuts.
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Postholer - Hiking & GIS @postholer.com · 02/04/2025
Moderate flooding expected. Stay tuned. Forecast flood map, click any station for details: www.femafhz.com/map/36.18242... #flood #gischat
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