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SIGNATURE EXTENSION [1 record]
Record 1 - internal organization data 2002-04-05
Record 1, English
Record 1, Subject field(s)
- Remote Sensing
Record 1, Main entry term, English
- signature extension
1, record 1, English, signature%20extension
correct, officially approved
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
The use of training statistics obtained from one geographic area to classify data from similar areas some distance away. 2, record 1, English, - signature%20extension
Record number: 1, Textual support number: 1 CONT
The alternative to depending on training sites for classification is to apply the concept of signature extension. This term refers to the assumption that a single, more or less constant, spectral signature may be defined as characteristic of any class, and that this signature has broad (universal) applicability to any scene in a region, or even worldwide. As a specific example, the signature for winter wheat at its maturation should be essentially the same for fields in the U.S. Great Plains, Argentina, the Ukraine, and Australia - provided such variables as differing air masses, Sun position, soil types, soil moisture, etc. are compensated for. If that proves true, then an unknown feature or class in a given scene anywhere should be classifiable by comparing its spectral properties (for a Landsat pixel, its multiband digital number [DN] values) to a "data bank" containing standard values for each of many classes. The closest fit of the unknown's DN [digital number] values to those of some one class in the bank is assumed to identify it. 3, record 1, English, - signature%20extension
Record number: 1, Textual support number: 1 OBS
signature extension: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG). 3, record 1, English, - signature%20extension
Record 1, French
Record 1, Domaine(s)
- Télédétection
Record 1, Main entry term, French
- extension de signature
1, record 1, French, extension%20de%20signature
correct, feminine noun, officially approved
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
En classification des données, application des statistiques d'une zone géographique donnée à d'autres zones semblables, plus ou moins éloignées. 2, record 1, French, - extension%20de%20signature
Record number: 1, Textual support number: 1 OBS
extension de signature : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR). 2, record 1, French, - extension%20de%20signature
Record 1, Spanish
Record 1, Textual support, Spanish
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