This display mechanism is used in ArcGIS Pro, and Map Viewer in both ArcGIS Online and ArcGIS Enterprise. Data containing U and V components will be automatically converted to magnitude and direction during drawing. One is vector symbol drawing, in which the raster is divided into tiles, magnitude and direction values are calculated for each tile, and a vector symbol is drawn for each tile using the calculated magnitude and direction. There are two rendering mechanisms in ArcGIS. ![]() ![]() So how can you visualize the two rasters, either magnitude and direction variables, or U and V components? ArcGIS has a vector field data type and special renders for this purpose. To visualize wind or water flow, it is common to use vectors to symbolize size, color to represent speed, and symbol angle to represent flow direction. ![]() These can also be measured as U and V components, where U is the velocity toward east, and V is the velocity toward north. This blog describes the capabilities of visualizing wind and ocean current data in ArcGIS, as well as the workflow for preparing layers for visualization. The pair can be either magnitude (speed) and direction, where magnitude measures how fast wind or water flows, and direction measures the direction of the flow. Some scientific phenomena in the ocean or atmosphere, such as wind and current, are normally measured with a pair of variables.
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