Precipitation Viewer — How to use

Load daily or aggregated precipitation, pick an area, and export data. Follow the steps below.

1. Choose a data mode:
   • Daily: pick a single date — the layer loads automatically.
   • Aggregated: set From and To (≤ 90 days), choose a method (Average / Maximum / Total), then click Load Aggregated Data.
2. Select an area (top tools):
   • Search a place, county, or state to use its outline.
   • Draw Polygon or Draw Rectangle for a custom shape.
   • Upload Boundary to use your own GeoJSON or Shapefile (.zip containing .shp and other required meatdata).
   • One tool at a time: if a shape/boundary exists, click Delete Shape(s) before searching, drawing, or uploading again.
   Tip: You can load data first or select an area first. The selection matters for exports (clipping), not for loading.
3. Read the map:
   • Units switch (mm/in) updates the legend values.
   • Change Basemap anytime (street, topo, imagery, etc.).
   • Move your mouse over the map to see location and precipitation at the cursor.
4. Export data:
   • Pick Raster scope: Selected area (clips to your shape) or Entire raster.
   • Choose a format: GeoTIFF, CSV, or NetCDF, then click Download Raster.
5. Reset: Use Clear to remove the current layer and selection. The bottom-right button toggles fullscreen.