There are a number of geospatial alt data resources out there today.
The one we use for the majority of our data is Synthetic Aperture Radar (radar satellites), or SAR for short. If you're not familiar with the technology, though, it might not be intuitive how we go from a radar satellite image to an answer used in business decision making.
This infographic offers a quick step-by-step overview of how this process works.
Click here to download.