Page History

...

1. In Geoprocessing pane, click the Spatial Analyst Tools toolbox, click the Map Algebra toolset, click the Raster Calculator tool.
2. In the list of ‘Layers and variables’‘Rasters’, double-click the DEMSubbasin layer.
3. In the calculator, double-click the * button.
4. In the equation box, type “3.281”, which is the conversion factor from meters to feet.
5. For ‘Output raster’, rename the raster from “rastercalc” to “DEMft”.
6. Ensure your ‘Raster Calculator’ window appears as shown below and click Run.
   

...

1. Again, go back to the Raster Calculator tool. Delete the previous expression.
2. In the list of ‘Layers and variables’'Rasters’, double-click the DEMft layer.
3. In the calculator, double-click the <= button.
4. In the equation box, type “15”.
5. For ‘Output raster’, rename the raster from “demft_raster” to “Flood15ft”.
6. Ensure your ‘Raster Calculator’ window appears as shown below and click Run.
   

...

1. In a web browser, go to www.ncdc.noaa.gov/cdo-web/.
2. Click the Mapping Tool tab.
   
   You will search for data using the NHD hydrologic units. Previously, you had been working with the Buffalo-San Jacinto subbasin (HUC = 12040104). In this case, you will step up two levels to the Galveston Bay-San Jacinto subregion (HUC = 1204). 
3. On the Surface Maps tab, click Normals
   
4. In the left sidebar, on the Layers tab, uncheck Daily Climate Normals, and check Annual Climate Normals.
5. To the right of Annual Climate Normals, click the Map Tools button.
   
6. In the new ‘ANNUAL CLIMATE NORMALS TOOLS’ window, click Location.
7. Use the drop-down menu to select USGS HUC.
8. Use the ‘Select a HUC type’ drop-down menu to select Subregions (4-digit).
9. Use the ‘Select a HUC’ drop-down menu to select Galveston Bay-San Jacinto.
   
10. Click Zoom to location.
11. The left sidebar switches to the Results tab. Click Get All Location Data.
    
12. For Step 1, select CSV for the output format and click CONTINUE.
    
    
13. For ‘Station Detail & Data Flag Options’, check Station name, Geographic location, and Include data flags to include those variables the data table.
    
    
14. For ‘Select data types for custom output’, click the Annual Precipitation category to expand it.
15. Check Long-term averages of annual precipitation totals (ANN-PRCP-NORMAL).
    
    
16. At the bottom of the window, click CONTINUE.
17. Type your email address twice and click SUBMIT ORDER.
    
    Check your email. You should receive two emails a couple minutes apart, although it may take a few hours to receive the second email. The first one indicates that your data request was submitted and the second one includes the requested data.
    
    
18. In your email, click the Download link to download the requested CSV file.
    
    

...