Frequently Asked Questions
How to order a high-resolution satellite imagery?
When using the app, in the bottom-left corner of the map you have a button that allows you to enter the HD imagery picker. The button activates when:
- you’re logged in
- you zoomed in on an area of interest (e.g. it will not activate when viewing very large areas)
This is where you can find the button:
The purchase is only possible if there is high-resolution satellite imagery available for your area of interest. The picker allows you to browse and purchase archive high-resolution imagery by defining three main parameters – imagery resolution, date and order size.
Imagery resolution and date
You can choose from available satellite imagery using resolution options switch and date options switch(see image below). Before buying, it’s worth having a look at differences in satellite imagery resolution.
The exact area that you’re ordering will be defined by the square box in the middle. Just pan and zoom the map in order to set the box over the area for which you would like to purchase imagery. The red area underneath the box defines the extent of the currently chosen satellite imagery(based on resolution and date options). You won’t be able to buy an area outside of the currently chosen satellite acquisition. You can change the size of the box using area size options(see image below).
When using a high-resolution imagery picker the mini-map in the top-right corner displays a low-resolution preview of the currently chosen imagery. This is to help you when trying to avoid cloudy areas and as an overview of the lighting conditions on the image that you consider buying.
What are the differences in satellite-imagery spatial resolutions?
For a quick answer please use the slider below to see a difference between a 10m resolution(left) and 50cm resolution(right) satellite imagery of Main Square in Krakow, Poland.
Now the long answer. The spatial resolution of satellite imagery describes the size of image pixels in the physical world. It’s a value that you can use as a reference when thinking about what type of objects you’ll be able to see on the image. For example, 10m resolution imagery will only allow you to observe large scale events(e.g. wildfires) or objects(e.g. airports). When looking for smaller objects or a more detailed view, you’ll need high-resolution imagery.
Let’s take a car as an example. The average size of a car is around 4.5m x 2m. That’s 9m². You won’t see a car on a 10m resolution image, as the area of one pixel is 10m x 10m = 100m². Anything that will fall in that one pixel will be a single colour blob. If you take 50cm imagery, one pixel will be 0.5m x 0.5m = 0.25m². Therefore, a 9m² car will have 36 pixels which should be enough to describe a car’s shape, but it’s not like you’re going to read the license plates 😉
How can I use the high-resolution imagery from app.spectator.earth?
For more details on using SPOT and Pleiades data provided by Airbus please refer to Airbus License to use the satellite data.
Can I see some high-resolution data samples?
Can I access raw spectral bands or georeferencing information for commercial data?
At the moment we provide commercial data as a layer on the map. We don’t provide access to raw data products including spectral bands and georeferencing.
Where can I find all my purchased imagery?
All your purchased items are visible at all times in the layers controller. The layers controller is available in the top-left corner of the map as shown in the image below.
Can I see live view from the satellites?
The satellite tracking in the app is performed in real-time however, the imagery acquired by the satellites is usually significantly delayed(a very rough estimation is “a couple of hours”). Moreover, not all satellites acquire images with the same frequency, so always pay attention to the imagery date displayed in the app.