https://ctech.com/studio_help/file-format-details/gmf-file/index.htmlGeology Multi-File Geology Multi-Files: Unlike the .geo file format, the .gmf format is not based on boring observations with common x,y coordinates. The multi-file format allows for description of individual geologic surfaces by defining a set of x,y,z coordinates (separated by spaces, tabs, and/or commas). Geologic hierarchy still applies for definition of complex geologic structures. This file format allows for creation of geologic models when the data available for the top surface and one or more of the subsurface layers are uncorrelated (in number or x,y location). For example, a gmf file may contain 1000 x,y,z measurements for the ground surface, but only 12 x,y,z measurements for other lithologic surfaces. This format also allows for specification of the geologic material color (layer material number).Hugoen-ushttps://ctech.com/studio_help/file-format-details/gmf-file/ctech-example-gmf/index.htmlMon, 01 Jan 0001 00:00:00 +0000https://ctech.com/studio_help/file-format-details/gmf-file/ctech-example-gmf/index.htmlctech_example.gmf Database Generated GMF File (Creation at 7/22/2003 5:36:07 PM) Surface 1: 25 Coordinates Database Columns [GMF_Surface0 (Ground Surface)]: X, Y, Top surface 1 Sand