Specialized Photogrammetric Markers

Elevated Target Markers (ETMs) and Spinner Target Markers (STMs) provide a means to connect independent photogrammetric networks that typically do not share common points. ETMs and STMs are imaged in more than one network, thus allowing multiple photogrammetry surveys to be linked into a uniform coordinate system.


Click here for more information on ETM/STMs.


Field Marker Targets (FTMs) are designed for photogrammetric measurement in tall grass, typically adjacent highway shoulders and median areas involving vehicle crash evidence.


Click here for more information on FTMs.