Temperature and precipitation datasets are some of the most important types of data used for drought and climate analysis. Temperature and precipitation data are collected from weather stations, weather radar, satellite and computer models. To make the data easier to use, many organizations derive products from the raw data. These derived products may start with station data, which estimate (or interpolate) the information between stations using different methodologies. Radar and satellite based products may include station data as ‘ground truth’ to remove bias and create more accurate products.