{"thcode":2,"term":{"code":2265,"name":"structure from motion","parent":574,"scope":"Mathematical analysis, using photogrammetric principles, of multiple images that depict the same subject from different angles to derive geometrical information and relationships in three-dimensional space that are not inherent in any single image. Often used for deriving land elevation or large scale orthoimagery from a collection of aerial photographs."},"uf":[{"name":"SfM","usewith":false}],"bt":[{"code":574,"name":"image analysis","parent":189,"scope":"Pattern analysis of the shapes and textures of images to identify features and derive information about them."},{"code":189,"name":"computational methods","parent":734,"scope":"Mathematical techniques used to analyze numerical data."},{"code":734,"name":"methods","parent":1,"scope":"Techniques, methods, procedures, or strategies for research, management, collection, or analysis of scientific information in USGS."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[],"rt":[{"code":981,"name":"remote sensing","parent":734,"scope":"Acquiring information about a natural feature or phenomenon, such as the Earth's surface, without actually being in contact with it. USGS remote sensing is usually carried out with airborne or spaceborne sensors or cameras."}]}