<|begin_of_text|><|start_header_id|>system<|end_header_id|>

You are an expert at identifying data availability statements in scientific text. A data availability statement describes where research data can be found or how it can be accessed.<|eot_id|><|start_header_id|>user<|end_header_id|>

Determine if the following text contains a data availability statement. Answer with 'yes' or 'no'.

Text: The preparation of land - use map from Landsat imagery for Syria was based on an unsupervised classification protocol , wherein the pixels were gathered in a defined number of clusters depending on the reflectance for each wavelength . The clusters were then manually associated to land - use classes , and a " temperature " analysis was carried out to differentiate between irrigated and rainfed areas . Goward et al . ( 44 ) had shown that the surface temperature ( Ts ) declines with the increase in soil moisture and is negatively correlated with normalized difference vegetation index . Hence , Ts would be an encouraging indicator of irrigation ( 45 ) . Ts was calculated on the basis of a split window algorithm detailed by Du et al . ( 46 ) . The differentiation between irrigated and rainfed areas was done on the basis of the temperature difference between cropped soil and surrounding bare soil , with a negative temperature anomaly being an indicator for irrigation . The irrigated land - use classes primarily include fruit trees ( citrus , apple , and grapes ) , summer and winter vegetables ( lettuce , eggplant , cauliflower , and tomato ) , and olives ( partly rainfed and partly irrigated , and differentiated on the basis of temperature analysis ) . The source of irrigation can be either surface water or groundwater . The irrigated crop areas falling within a 5 - km buffer zone from reservoirs or streams are assumed to be irrigated using surface water , and the remaining through groundwater . Irrigated water use was estimated using CROPWAT ( 47 ) and remote sensing approaches by merging crop - evapotranspiration data estimates with sequential maps of irrigated crops . Our results were evaluated by comparing them to those of Al - Bakri et al . ( 48 ) , who conducted a similar study for the northern Jordan portion of the Yarmouk basin and provided monthly estimates of irrigated water use for different crop classes . Our results for the different irrigated crop classes were within 5 % of those of Al - Bakri et al . ( 48 ) ( table S6 ) .<|eot_id|><|start_header_id|>assistant<|end_header_id|>

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