South Lake Tahoe Caldor Fire Timelapse

Friday, September 3, 2021 

Sentinalhub Playground is an excellent resource for near real time, albeit not quite google earth 1m resolution, satellite images.  One of the cool features is being able to adjust the mapping of the satellite bands to RGB outputs.  For example, using Sentinel-2 L2A image data of South Lake Tahoe between 2021-08-17 and 2021-09-01 and remapping the 2190nm (SWIR2) to red, which tends to highlight fires though isn’t thermal, 783nm to green, a vegetation band (though it is NIR to humans) to make vegetation cover more obvious, and 443nm to blue instead of 490nm as shorter wavelengths tend to be scattered more by aerosols and smoke the fire line (bright red) and smoke (obvs) is very visible while vegetation is (false) green. Burnt earth shows as dark red, compared to bare ground, which tends to show tan in this mapping, thus revealing the current line of fire, the recently burned areas, and the wind direction carrying smoke, which tends to correlate with the advancing line, and fuel (vegetation) still standing.

Sentinel-2 L2A image on 2021-09-01 if South Lake Tahoe Caldor Fire


Then using the history controller to generate and save a sequence of stills, we can animate the progress of the fire with a simple FFMPEG command:

ffmpeg -framerate 1 -pattern_type glob -i '*.jpg' -vf crop=1754:1146 -c:v libx264 -r 30 -pix_fmt yuv420p fire.mp4

and you get:


Posted at 08:17:00 GMT-0700

Category: EventsGeopostmaptechnologyvideoweather

Visiting the Burj Khalifa

Saturday, February 2, 2013 

Dubai is an interesting contrast to Iraq. The first time I went through DXB from BSR it was more than a little culture shock. Getting out of the airport only amplifies the experience.

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Jared and I had dinner at the Mall of Dubai and before eating had a little walk around the fountains – the largest dancing fountains in the world at the foot of the tallest man-made structure in the world.

Dubai DSC03693.jpg

Dubai is an good place to spot cars. Obviously the gold accented rolls is more pose-worthy than the $450k GTO. Then again they were probably posing with the license plate number which I think was 1, and therefore cost as much as 20 Ferrari GTOs.

Dubai DSC03695.jpg
The fire fountains:
[quicktime width=”560″ height=”331″][/quicktime]

Dubai DSC03692.jpg

Posted at 17:58:15 GMT-0700

Category: mapphotoplacestravelvideo

Google Street View ReflectoPorn

Tuesday, March 6, 2012 

Google drove past our little village in Italy and caught themselves in the turning mirror just about perfectly.

The coverage they have is getting pretty impressive.

Posted at 22:59:11 GMT-0700

Category: mapphotoplaces

New Espresso Machine @ LAX RCC!

Monday, May 11, 2009 

Yay! Tastes like coffee even. Finally, real coffee-based espresso drinks rather than RealCaughfee industrial powder based reconstituted hot beverages. This is a huge improvement. One side has a Concordia IBS, the other side has a 2500i. Both are good. Both have a double shot option. I am now wired for the day.

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Posted at 12:13:49 GMT-0700

Category: Geopostmapphotoplanestravel

Cool Tracking Technology

Wednesday, February 4, 2009 has a pretty cool solution. Nothing radically novel in concept, but it does pretty much just work and with most devices with a GPS.


It’s a little different from Google Latitude, which has a social aspect (your friends) but no history. Latitude is built into Google Maps Mobile 3.0, so everyone will have this on their phone in a few days. That’ll be weird fur sure.

Amazingly I downloaded this app this morning at 3.0.0, by the time I’d told a friend about it the release was 3.0.1, and the last person I told got 3.0.2. I guess Google is excited about this one.

Posted at 12:30:05 GMT-0700

Category: cell phonesGeopostmapplacestechnology

Bit by a dog!

Sunday, November 23, 2008 

I was running up in Redwood Regional Park today and this very hippy couple in brightly colored hand woven South American fabrics came along the trail the other way with three dogs. Two passed in typical dog-like manner. But the last, a floppy moppet of a white spaniel or something comes running by and bites my leg on the way.

I thought at first it was just a smack and went on my way, but then I saw blood drooling down my leg, mixed with dog drool, so I ran back to the couple to make sure the dog’s shots were up. They didn’t even offer their names, which suggests to me that they were probably from Berkeley because it seemed more like Presumed Entitlement than Attitude, which would have suggested Oakland provenance. I had just started a 5.25 mile run and didn’t want to stop and deal with it, so floppy gets to bite another day.

In the end it doesn’t feel too bad, a couple of cuts on the bony side and one little puncture on the chewy side.  The picture is after about an hour of running and then driving home and washing it off, but it did look butch with a rivulet of blood running down my shin and coloring my sock.


Once somebody said “Oh, I didn’t know you had a sister.”
I didn’t bite the dog.  Nor Karve my initials on the møøse with a toothbrush.

Posted at 02:26:47 GMT-0700

Category: Geopostmapphoto

Hi from San Miguel

Saturday, November 15, 2008 

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We stopped in a little store in San Miguel on our way to Parkfield to see DVR’s project and buy some beer.  It seems they approve of that type of transaction in San Miguel.
Posted at 19:00:13 GMT-0700

Category: Geopostmapphotoplacestravel


Thursday, October 9, 2008 

I went to a local VC/Entrapeneur meet n’ greet in Waterloo Canada.  It was quite good – lots of interesting people.
Posted at 21:00:12 GMT-0700

Category: mapphoto

Police waiting

Wednesday, October 8, 2008 

Lots of cops… What for I wonder.

Maybe a very bad flight…
Posted at 19:00:15 GMT-0700

Category: mapphotoplanes

The Pacific from the Delfina

Monday, September 22, 2008 

the pacific from the delfina.jpg

I’m staying at the Sheraton Delfina Hotel in Santa Monica.  It’s a very nice hotel – not quite as dramatic through the lobby as some, the rooms are comfortable and the views are good.  The shower was a bit weak though and the AV system is nowhere near as cool as the Holiday Inn on King in Toronto.

Odd thing, the local high school football field was right next door so I woke to the sound of the marching band trying to figure out Eleanor Rigby.

Posted at 17:00:12 GMT-0700

Category: hotelsmapNeutralphotoreviews