WINETECH Technical Yearbook 2021

4. To further the understanding of temperature and terrain, a high density wireless logger (50) network has been installed in the Banghoek/Jonkershoek Valley. This resource will be used to interpolate very high resolution climate surfaces, which will be compared against the regional interpolations, thereby providing new information for improved understanding of climate and terrain dynamics and improving spatial interpolation methods in the future. 5. TerraClim project has advanced even further in 2020 with re- search and development, creating a grapevine suitability tool within TerraClim that can recommend future plantings and utilise the integrated geodatabase. This new and novel suitability tool developed within TerraClim, can be tailored to any crop type based on the input data for analysis. Extensive council with viticulturists, consultants and researchers rendered the best source for suitability analysis to be an existing database of currently planted vineyards in the Western Cape. The suitability analysis is based on a data-mining approach, using a test database of actual vineyards (seven wine

FIGURE 4. Shows the regional delineation selected for TerraClim processing, area extent covers approximately 97.9% of vineyards in the Western Cape. The image on the left shows the RMSE per region for study area, areas highlighted in red are of greater concern than areas in green. On the right is an example of merged daily average temperature (14 February 2019) symbolised using a natural breaks stretch (left) and quantile classification (right).

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