Which of the following file formats is NOT recognized as an OGC standard?

The choice of DOCX as the file format not recognized as an Open Geospatial Consortium (OGC) standard is grounded in the purpose and design of the file formats involved. DOCX is a document format developed by Microsoft for word processing documents, and it does not adhere to the standards set by OGC for geospatial data exchange.

In contrast, the other file formats mentioned—GeoTIFF, LAS, and GML—are widely recognized and utilized in the realm of geographic information systems. GeoTIFF is a raster graphics format that includes georeferencing information within a TIFF file, enabling the storage of spatial data. LAS is a binary file format used for LiDAR (Light Detection and Ranging) point cloud data, widely accepted in the fields of remote sensing and surveying. GML, or Geography Markup Language, is an XML-based format used for expressing geographical features, which is explicitly defined as an OGC standard.

Thus, while DOCX serves a different purpose, GeoTIFF, LAS, and GML are inherently aligned with OGC's goals of promoting interoperability in geospatial data.