Files with sdml extension are known as CAD and GIS storing data files.
SDML file extension - Spatial Data Modeling Language VRML file
What is sdml file? How to open sdml files?
File type specification:
The sdml file extension is used for files written in the spatial description language used for storing CAD and GIS data, such as found in Landscape Planning, Design, and Architectural databases. Spatial Data Modeling Language was developed by the Silicon Graphics.
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