LLID Application Help Page

Layers can be added or removed from the map, as shown in the image to the right. The map layers are well-known features like cities, major roads, minor roads, county boundaries and sub-basin boundaries that may be useful geographic references. Also included are streams, large lakes, small lakes and zip code boundaries.

The Minor Roads layer is a detailed layer that will only be shown when the Map Width (shown at bottom of map) is 15 miles or less.

To add layers: Click on the box for each layer to checkmark. Then click on the “Redraw Map” button at the bottom of the list.

To remove layers: Click on the box to uncheck the layer and click on the “Redraw Map” button.

To identify stream LLIDs and river miles, the Streams layer needs to be turned on. The Streams layer can be turned on or off at any time, but the map will re-draw faster when zoomed in to a smaller area on the map.

To identify stream LLID and River Mile: Select “Streams” from Features to Identify at top of map, then click on the stream at the point of interest.  The stream name (if name is available) and LLID, and the River Mile, Latitude, and Longitude of the point will appear in the column to left of map. The point clicked on the stream will show as a red circle on the map and the selected stream will be highlighted in red. Zoom in to a Map Width (shown below the map) of 1 mile or less for an accurate River Mile.

To find specific stream using LLID:  De-construct LLID into longitude and latitude, and use “Locate Lat/Long” in column to the left of the map.  For example, LLID 1231425447502 represents a stream with mouth at Longitude -123.1425 and Latitude 44.7502 (Santiam River).

To locate a specific point with known latitude and longitude: In the column to the left of the map under “Locate Lat/Long”, type in the latitude (in decimal degrees) in the form yy.yyyy and the longitude (in decimal degrees) in the form –xxx.xxxx and click “Locate” button. The point for that location will be displayed on the map as a yellow circle.

Several control options are provided above the map, as shown in the image below:

Click on the Map to:

Zoom In or Zoom Out - See more map details or move out for a broader view. Click on the “Zoom In” or “Zoom Out” button, then click on the map.

Pan - Move the map display horizontally or vertically to show other areas. Click on “Pan” button , then click on the map. The map will re-draw and be centered on the point that was clicked.

Map Latitude/Longitude - Identify the latitude and longitude at any point on the map. The point is displayed on the map as a cyan circle, and the latitude and longitude are displayed in the column on left of map.

Select feature to identify:

Identify individual features on the map - Select the map layers with the features of interest and Redraw the map. Click on the button of the feature type of interest, then click on the map on the specific feature to identify.

Cities, Major Roads, Minor Roads, Large Lakes, Small Lakes, or Zip Code - The individual feature will be highlighted on the map and a label with the specific feature information will be added to the map. Example: Redraw map showing Large Lake layer.  Click on a lake in the map and a label with the lake name will be shown.

Streams – The stream name (if name is available) and LLID, and the River Mile, Latitude, and Longitude of the point clicked on the stream will appear in the column to the left of map. The point clicked on the map will show as a red circle on the map and the stream will be highlighted in red.  For better results if multiple streams and tributaries appear highlighted, zoom in to a Map Width of 25 miles or less to correctly select and identify the stream of interest.