Photogrammetry in mangroves refers to photogrammetry applied to the monitoring of coastal ecosystems where there is a presence of mangroves (mangrove forests). It is a practice that has gained popularity thanks to the greater availability of unmanned aerial vehicles (UAVs or Drones in English), which can be used in an affordable and practical way for the monitoring of natural ecosystems (environmental monitoring) that are subject to conservation, restoration processes and/or some other form of human intervention for the benefit of the local ecosystem.

Drone photogrammetry uses aerial photography techniques to produce orthophotos and/or orthomosaics, by adapting the sampling route, flight patterns and height of the UAV to produce images of adequate quality for mangrove monitoring.

The images produced with these methods are classified as having high or very high spatial resolution, depending on whether the pixel covers 1 to 5 meters or 1 to 100 centimeters, respectively.[1] This resolution is very useful in the context of environmental conservation projects since it allows for more precise analyzes than those obtained through satellite images, which tend to have spatial resolutions with pixels of 10 meters or more per side, as is the case with mission images. Sentinel-2 and Sentinel-3.

The use of UAVs by communities and conservation groups has recently been registered as a strategy for the management, conservation and defense of the territory, as well as for social oversight processes where communities are empowered in the conservation of their natural environment by being able to generate reliable and accurate information on the natural areas for which they advocate.[2]​[3]​.

There are some key differences between aerial photography and photogrammetry, especially in the type of information generated with each technique. Aerial photography produces two-dimensional photographs of variable extent where a territory is represented with the minimum possible distortions, but elevation is not considered a key factor in the final product, only in the image correction process; while photogrammetry considers two (latitude, longitude) or three dimensions (latitude, longitude and elevation) for the development of its products, resulting in more complex products such as three-dimensional images, point clouds and elevation models, among others.