Crop ground cover fraction and canopy chlorophyll content mapping using rapideye imagery
Autor(en): | Zillmann, E. Schönert, M. Lilienthal, H. Siegmann, B. Jarmer, T. Rosso, P. Weichelt, H. |
Herausgeber: | Schreier, G. Skrovseth, P.E. Staudenrausch, H. |
Stichwörter: | Canopy chlorophyll content; Canopy chlorophyll contents (CCC); Chlorophyll; Chlorophyll meter readings; Crops; Empirical relationships; Ground cover; Ground covers; Mapping; Precision agriculture; Predictive analytics, Canopy chlorophyll; RapidEye; Site-specific crop management; Spatial variability; Spatial variability, Remote sensing | Erscheinungsdatum: | 2015 | Herausgeber: | International Society for Photogrammetry and Remote Sensing | Enthalten in: | International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives | Band: | 40 | Ausgabe: | 7W3 | Startseite: | 149 | Seitenende: | 155 | Zusammenfassung: | Remote sensing is a suitable tool for estimating the spatial variability of crop canopy characteristics, such as canopy chlorophyll content (CCC) and green ground cover (GGC%), which are often used for crop productivity analysis and site-specific crop management. Empirical relationships exist between different vegetation indices (VI) and CCC and GGC% that allow spatial estimation of canopy characteristics from remote sensing imagery. However, the use of VIs is not suitable for an operational production of CCC and GGC% maps due to the limited transferability of derived empirical relationships to other regions. Thus, the operational value of crop status maps derived from remotely sensed data would be much higher if there was no need for reparametrization of the approach for different situations. This paper reports on the suitability of high-resolution RapidEye data for estimating crop development status of winter wheat over the growing season, and demonstrates two different approaches for mapping CCC and GGC%, which do not rely on empirical relationships. The final CCC map represents relative differences in CCC, which can be quickly calibrated to field specific conditions using SPAD chlorophyll meter readings at a few points. The prediction model is capable of predicting SPAD readings with an average accuracy of 77%. The GGC% map provides absolute values at any point in the field. A high R2 value of 80% was obtained for the relationship between estimated and observed GGC%. The mean absolute error for each of the two acquisition dates was 5.3% and 8.7%, respectively. |
Beschreibung: | Conference of 2015 36th International Symposium on Remote Sensing of Environment ; Conference Date: 11 May 2015 Through 15 May 2015; Conference Code:112074 |
ISBN: | 9780000000002 9781629934297 9781629935126 9781629935201 |
ISSN: | 16821750 | DOI: | 10.5194/isprsarchives-XL-7-W3-149-2015 | Externe URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930394247&doi=10.5194%2fisprsarchives-XL-7-W3-149-2015&partnerID=40&md5=9a0d07ba71c64858be0f75ac076ad978 |
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geprüft am 05.06.2024