Warbird Information Exchange

I happened to be looking for something in SoCal and took a look at Chino. I was very surprised to see it shows the airshow aircraft and vendor tents but no crowd. This is on Google Maps.

https://goo.gl/maps/pMAaYSVcbdWdmH249

Why is this surprising? That picture was probably taken at least a day or two before the airshow. Vendor tents and infrastructure don't magically appear the morning of an airshow. I don't think most people realize the HUGE amount of planning it takes to setup an airshow. Some airshows/events set up things weeks and not days in advance. I don't know about Chino, but I do know that in the Reno Air Races this is the case.

Good catch, fun to see all the show aircraft lined up!

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I know what it takes to set up for an airshow and the planning involved. I was just surprised that the satellite happened to pass over during the period of the show.

Airshow - 2020 style...

Phil

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It looks to me like it was taken on Friday 5/3/2019. We were on the ground in the media area that day.

All 4 P-47s are lined up in front of the media area and Hairless Joe came in on Thursday.

Probably not a satellite.

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Correct. Most (all?) of the high res stuff you see on Google is from aerial photography.

Incorrect. Most of what Google uses now is satellite. There are now several constellations that take high-res imagery on a nearly daily basis of the planet and Google and Microsoft have both been in the process of replacing the previously aerial photography with satellite data because they can also use it to create the photogrammetry that results in the 3D buildings and terrain data that has much higher precision than previously possible.

Most of Google's imagery now comes from MAXAR - https://www.maxar.com/

Their standard resolution now is 30CM and their newest satellites are producing 15CM resolution and potentially better with the new WorldView Legion constellation that will be launching this year - https://www.maxar.com/splash/it-takes-a-legion

I agree, probably a Friday afternoon. Nobody in the Superior Sod parking area and my truck isn't in front of my hangar! The current military jets are all in place as well.

This is a parking lot near my house. You think the image is from a satellite?

https://www.google.com/maps/@33.8783234 ... a=!3m1!1e3

The answer from Google is that they use both satellite and aerial photography.

How images are collected
You can see a large collection of imagery in Google Earth, including satellite, aerial, 3D, and Street View images. Images are collected over time from providers and platforms. Images aren't in real time, so you won't see live changes.

When images are collected
Some images list a single acquisition date, which is defined by the image provider.
If an image is a mosaic of multiple satellite or aerial photos taken over days or months, a date range with a start date and an end date is displayed to show the dates the images were collected between.
If little or no date information is supplied by the data provider, a start and end date are shown for the range within which we can be reasonably certain the image was taken.
Examples:

"Summer 1995" might become start:1995-06-01 and end:1995-09-30
"1943" might become start:1943-01-01 and end:1943-12-31
Note: For all images with date ranges, the "Imagery Date" shows the oldest date in the possible range, so that a date is never newer than the actual image collection date.

If you’re looking for more information about when an image was collected, contact the original provider of that dataset. Image providers are shown in copyright dates. Google is not able to provide any more information about imagery it owns beyond what is displayed in Google Earth and Maps.

Why image dates change
Images closer to the ground are usually made up of one image. The date displayed in these cases should stay the same wherever you move your cursor.
Aerial images are usually made up of a mosaic of several images. The date may change as you move your cursor around the map.
No date is shown when there is no date information available for the image or when your cursor is over the seam of two images.
More about image types & their collection dates
Satellite & aerial images
The satellite and aerial images in Google Earth are taken by cameras on satellites and aircraft, which collect each image at a specific date and time. Those images can be used in Google Earth as a single image with the specific collection date, but sometimes:

The images are combined into a mosaic of images taken over multiple days or months. These images are displayed as one seamless image and the date may change as you move your cursor around the map.
There is limited information about the image collection and the date displayed reflects the start of a date range when the image was most likely collected.
When the "3D Buildings" layer is turned on, the detailed terrain and buildings images are derived from aerial images collected over multiple dates, so Google Earth does not display a collection date.
The collection date information is lost or inaccurate due to human error or other issues.

Anyone else see the winless F-89?

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On Google Earth the image is dated May 2nd.

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Google uses a combination of aerial mapping and satellite technology. I use to work for a contractor that did aerial mapping for Google.
First they have a fleet of Cessna 206's that at the time I left had six cameras on board. 4 oblique and two top down. These cameras were medium format digital cameras that had a very high pixel resolution. Each city was broken down into boxes and these boxes had on average about 13-15 lines in each box. Each box would take about 1.5 hours to fly and we could do about 1.5 boxes on a single flight before the hard drive was full. Since the resolution was so high each picture was about 40-50MB and we would collection over 6000 pictures per box. These boxes were flown about 3700 AGL. Google also used King Air's to fly a higher altitude profile somewhere around 18000-19000 feet. I don't know much about this program but did run into the King Air guys several times. Google still uses the planes as I have seen them with my current flying job. Most of the work we did will end up on Google Earth and can be seen with their 3D buildings.

Kevin

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Kevin Orr
https://b-25history.org/index.htm