iiinova — where your digital self keeps evolving

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 · 24/07/2026

Here you go. I broke it down in several steps instead of a single pipeline:

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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 · 20/07/2026

You can 'fix' it with another DEM. + get 1m DEM footprint as vector + clip 1m DEM with vector buffer -3 meters + stack a 10m DEM with the clipped 1m + clip stack'd to original footprint and save Untested GDAL attached:

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Postholer - Hiking & GIS @postholer.com · 19/07/2026

Hurricane season is heating up. Interactive map: www.femafhz.com/map/30.07318... #hurricane #TD2

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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

Animation, last 72 hours of smoke, hotspots and landcover that represents fire weather index. Updates every 4 hours. Lot's going on right now. www.postholer.com/trail-fires/...

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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 · 25/04/2026

Here's a GDAL only version of your parquet parcels example:

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Postholer - Hiking & GIS @postholer.com · 20/11/2025

Here's the 11/13 23:00 3 day NBM QPF forecast compared to actual precip. Red means NBM over-stated (in inches):

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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 · 17/11/2025

Roll your own without hosting any DEM data or 3rd party dependencies, using GDAL and Sentinel data on AWS. Add the following to your server side API: #maps #gis

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Postholer - Hiking & GIS @postholer.com · 12/11/2025

Here's an interactive map with the same data. Double-click anywhere to get the annual precipitation for an exact location: www.femafhz.com/map/48.62379...

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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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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 · 27/10/2025

Here's a National Risk Index map for those disasters, except interactive, at state, county, census tract level for 24 different categories and 20+ metrics, percentile, expected annual loss, etc ,etc. 2022 data. Riverine Flooding shown: www.femafhz.com/map/36.98500...

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Postholer - Hiking & GIS @postholer.com · 27/10/2025

Fully interactive map of #Melissa, with the most up-to-date NHC data: www.femafhz.com/map/19.43551...

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Postholer - Hiking & GIS @postholer.com · 26/10/2025

Here's the same result using only #GDAL, cutting out the python nastiness: Simplify: gdal vector simplify --input=states.gpkg --tolerance=.5 --output=simple.gpkg Clean coverage: gdal vector clean-coverage --input=simple.gpkg --snapping-distance=.7 --output=clleaned.gpkg

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Postholer - Hiking & GIS @postholer.com · 23/10/2025

#Melissa Cat 2-4, Sun 8am to Tues 8am, with Jamaica on the right hand side of the storm, 50km away. Brutal. www.femafhz.com/map/17.66233...

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Postholer - Hiking & GIS @postholer.com · 16/10/2025

"GeoParquet file plonked on a web server" is disingenuous. Only Spark/SedonaDB query by polygon/attribute, requiring HDFS. Examples DuckDB, GeoPandas, GDAL all use bbox. With FGB you don't need any of that. Overture 145M buildings, single 35GB FGB remote web server: www.femafhz.com/map/26.90634...

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Postholer - Hiking & GIS @postholer.com · 09/10/2025

According to Bureau of Reclamation, Powell has a 10% chance of 'minimum power pool' for 2027/28/30. 3% chance for 2029. Mead has 7% chance for 2029, 3% for 2030, otherwise 0%. www.usbr.gov/lc/region/g4...

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Postholer - Hiking & GIS @postholer.com · 08/10/2025

Interactive map, always the latest info: www.femafhz.com/map/27.32653...

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Postholer - Hiking & GIS @postholer.com · 28/09/2025

Always current interactive map, tracks, intensity, wind fields, watches & warnings, etc: www.femafhz.com/map/38.03078...

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Postholer - Hiking & GIS @postholer.com · 28/09/2025

Always current interactive map, tracks, intensity, wind fields, watches & warnings, etc: www.femafhz.com/map/38.03078...

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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

Interactive with flood, risk & tons more: www.femafhz.com/map/37.84965...

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Postholer - Hiking & GIS @postholer.com · 03/09/2025

Interactive: www.femafhz.com/map/22.89978...

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Postholer - Hiking & GIS @postholer.com · 02/09/2025

Interactive: www.femafhz.com/map/32.67719...

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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 · 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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Postholer - Hiking & GIS @postholer.com · 11/08/2025

Said "journalist" reporting on Oct 7th:

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Postholer - Hiking & GIS @postholer.com · 11/08/2025

Said "journalist" reporting on the day of Oct 7th:

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