Surface temperature measurement from space : a case study in the South Western Cape of South Africa
| dc.contributor.author | Sandham, L. A. | en_ZA |
| dc.contributor.author | Zietsman, H. L. | en_ZA |
| dc.date.accessioned | 2017-06-08T09:25:45Z | |
| dc.date.available | 2017-06-08T09:25:45Z | |
| dc.date.issued | 1997-03 | |
| dc.description | CITATION: Sandham, L. A. & Zietsman, H. L. 1997. Surface temperature measurement from space : a case study in the South Western Cape of South Africa. South African Journal of Enology & Viticulture, 18(2):25-30, doi:10.21548/18-2-2250. | |
| dc.description | The original publication is available at http://www.journals.ac.za/index.php/sajev | |
| dc.description.abstract | This paper reports on the use of Landsat Thematic Mapper (TM) thermal infrared (TIR) and Transformed Normalised Difference Vegetation Index (TNDVI) data to map summer surface temperature distribution in a portion of the South Western Cape (South Africa). It adopts a ground truth calibration approach, as a possible solution for alleviating the paucity of spatial temperature data. Means and standard deviations of the TIR and transformed NDVI of all pixels within a radius of 120 m around each ground truth point were regressed on spatially collocated surface-observed temperature data. Linear multiple regression analysis showed that mean TIR and standard deviation of TNDVI were effective in accounting for 43 % of variation in surface temperature. The regression equation was used to generate a temperature map at a spatial resolution of 30 m, showing good agreement with expected mesoscale spatial temperature patterns in terms of general climatic principles. The temperature map provides a useful tool for depicting and assessing the spatial variation in daily temperatures, providing information currently unavailable to the fruit-producing farmers in the South Western Cape. | en_ZA |
| dc.description.uri | http://www.journals.ac.za/index.php/sajev/article/view/2250 | |
| dc.description.version | Publisher's version | |
| dc.format.extent | 6 pages : illustrations | |
| dc.identifier.citation | Sandham, L. A. & Zietsman, H. L. 1997. Surface temperature measurement from space : a case study in the South Western Cape of South Africa. South African Journal of Enology & Viticulture, 18(2):25-30, doi:10.21548/18-2-2250 | |
| dc.identifier.issn | 2224-7904 (online) | |
| dc.identifier.issn | 0253-939X (print) | |
| dc.identifier.other | doi:10.21548/18-2-2250 | |
| dc.identifier.uri | http://hdl.handle.net/10019.1/101729 | |
| dc.language.iso | en_ZA | en_ZA |
| dc.publisher | South African Society for Enology and Viticulture | |
| dc.rights.holder | South African Society for Enology and Viticulture | |
| dc.subject | Earth temperature -- Cape Town (South Africa) | en_ZA |
| dc.subject | Landsat satellites -- Cape Town (South Africa) | en_ZA |
| dc.subject | Thematic maps -- Cape Town (South Africa) | en_ZA |
| dc.subject | Infrared radiation -- Cape Town (South Africa) | en_ZA |
| dc.subject | Thermal infrared -- Cape Town (South Africa) | en_ZA |
| dc.subject | Transformed Normalised Difference Vegetation Index (TNDVI) | en_ZA |
| dc.title | Surface temperature measurement from space : a case study in the South Western Cape of South Africa | en_ZA |
| dc.type | Article | en_ZA |