What is Photogrammetry?

• Believe it or not, but your camera is a remote sensing instrument!
• Photographs of clouds, for example, can be very useful when studying convection.
• We can use cloud photos in a scientific manner.
• It is possible to create an azimuthal/elevation angle grid on the photograph.
• This technique is called cloud photogrammetry 
• The azimuth/elevation angle grid is created by knowing the locations of landmarks in the picture.

• Hence, it is important to have the horizon in your image with distinguishable features on the horizon.
• The azimuth/elevation angle grid on the image is very similar to putting lat/lons on a satellite image.
• If you have gridded pictures from more than two photo sites, it is possible to triangulate cloud locations to determine their exact locations.
• Also, if you know the cloud position, you can accurately determine cloud base.
• It is also possible to combine radar data with photogrammetrically analyzed photographs.  Here are a couple examples.