TSTool_User_09-09-00 - Laserfiche WebLink

Using the Map TSTool Documentation Real -time data (often provisional data available for a short period). Real -time extended data — real -time data collected for the past year, for example, having received limited or no quality control Real -time archived data — real -time data for the historical period, quality controlled Hourly accumulation — for example, convert real -time precipitation data to hourly totals Daily accumulation — for example, convert hourly precipitation data to daily totals Monthly accumulation — etc. Yearly accumulation — etc. The first two examples are often referred to as "real- time" data whereas the last five examples are often referred to as "historical' data. In a system that is homogeneous, a map layer that shows "Precipitation Stations" will imply that all of the above time series are available at the station. However, in a system where, for various reasons, not all stations have real -time and historical data, more attention to detail may be needed on maps. To address this case, the map could show separate layers for real -time and historical stations (two layers). However, this does not address the issue that there may be multiple categories of real -time data and multiple categories of historical data. To address this issue, additional layers might be added for each time series type, using the same or similar symbols for each layer. The limitation in this approach is that the map now has many layers and many of the points will be the same and will therefore symbols will plot on top of each other. Layered symbols can be used to help with visualization. For example, use the symbol size and shape, and configure the order of layers to ensure that multiple symbols drawing on each other will still allow sufficient visibility of the symbols. This can be applied to indicate data types collected at a location, and also data type /interval information. The following example shows this approach to indicate station type: Streamflow Station + Reservoir Elevation Station ❑ Climate Station • Operations Information Only �4nlh Pa Lake Wimnipesaukea v Poarfarm Bank � ' "� ❑ - walfek?nry �L t_akepart Cam z <', V'An niisqu Sa f Silver Lake OL Vumnipesaukee . tt4 ` Merrimack Rifer A r r' �4L �. SymbolExample Example of Symbol Layering Using many layers and symbols to indicate time series data interval may not be appropriate if the symbols are to be used for classification. For example, the symbol size or color may indicate a physical characteristic of the feature. For this reason and because maps usually focus on physical features, using symbols to indicate the various data intervals is not common. More common are maps that show a layer for real -time data and a layer for historical data, as shown in the following figure: Using the Map - 2 1