Using the points and polygons options of "Ad Hoc Operations" can quickly calculate time series values for areas of interest between different Map Windows. 

This task will demonstrate creating time series for "Point and Polygon Operations" to compare different precipitation products for the same observed period.  

Examine the Datasets.

• Close all Map Windows except for the "MBRFC Precip 1HR" and "MRMS Precip 1HR" Map Windows.
• The Map Windows can be placed side by side using the "Tile Windows" button.
• In the "MBRFC Precip 1HR" zoom into the heaviest precipitation in the Vermillion, Lower Big Sioux, and Rock HUC 8s. 
• The Map Windows can be synced by right clicking in the "MBRFC Precip 1HR" Map Window and selecting "Sync Session Map Windows To This Map Window" option. 
  

Notice how the basin averages for the Vermillion, Lower Big Sioux, and Rock HUC 8s vary between the Map Windows. The basin average values are close but not the same. The "MBRFC Precip 1HR" Map Window is displaying hourly Stage IV grids and the "MRMS Precip 1HR" is displaying hourly MRMS grids. Both of these grid sets estimate observed precipitation but are produced by different National Weather Service centers. 

Adjust Project Settings.

• Navigate to the Properties and select the Global Settings. 
• Click on the drop down for the "Time Series Sampling Method" and select the "All Windows, Single Plot."
  
  
• This will ensure that sampled time series from all Map Windows plot into to a single Time Series Plot. 

Sample From the Map Windows.

• Click on the "MBRFC Precip 1HR" Map Window and then select the "Define Polygon" tool. 
• Draw a polygon in the Vermillion HUC 8. 
• Use the Ad Hoc Polygon Operations to plot the time series. 
• HEC-MetVue will calculate the time series for both Map Windows and place them into the same Time Series Plot.
  
• To adjust the color of one of the time series select Edit in the Time Series Plot and then Plot Properties. 
• Change the "MRMS Precip 1HR Polygon" line to have a color of "blue" and select "OK."
• Now the plot will show different colors for the Map Windows.
  
• Add another polygon for the Rock HUC 8 and a point in the Lower Big Sioux HUC 8. 
• These time series are added to the same Time Series Plot.
• Adjust the line colors for the additional polygon and point.
  

Question: Which precipitation dataset has the highest value?

Tasks

Part A – Introduction to the Project and Datasets

• Task A.1 – Opening the Project
• Task A.2 – Reviewing the Project Settings
• Task A.3 – Reviewing the MBRFC Datasets

Part B – Ad-Hoc Operations - Time Series

• Task B.1 – Exploring Point and Polygon Time Series Sampling Through the Ad Hoc Operations
• Task B.2 – Comparing Two Observed Precipitation Products
• Task B.3 – Comparing and Animating Two Forecasted Precipitation Products
• Task B.4 – Comparing and Animating a Forecast to Actual Observations

Part C – Mass Processing of Samples

• Task C.1 – Mass Processing of Subbasins
• Task C.2 – Mass Processing of Time Series Point Samples