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Show your estimated location on the map

Geolocation obtains your geographical position through the browser. Geolocation is most accurate for devices with GPS. After clicking the button, you will be asked for permission to share your location with this webpage.


Sacramento River GIS Viewer

Usage tips

  • Add layers from dropdown menu
  • Click Select Tool and click to get info on a feature
  • Navigate with Shift+Drag to rotate and zoom the map around its center
  • Click for more tips

Current Basemap



Shift+Drag to rotate and zoom the map around its center

Zooming: You can use your mouse wheel, or click the blue zoom in or zoom out buttons on the upper-left corner of the map.

Panning: Left-click on the map and drag to pan to a location.


Adding Layers: To add a map layer, select a layer from the drop-down menu that says Choose a layer to add. Once a layer is selected, it will load & draw on the map (This can take time with complex data). When the layer is loaded, a new legend entry will be added.

Getting Information about a layer: Click the info button within a layer's legend. This will display metadata and other information such as permalinks and download links.

Getting Information about features on the map: Click the Select Tool button at the top toolbar. Then either left-click to select a single feature or Control+left-click to draw a select box. A pop-up window will appear with tabular information on the selected layer. If more than one feature is selected, a popup window helps narrow down a feature of interest.

Removing Layers: Click the X on the legend item for a given layer. It will then be removed from the map.

Layer Appearance: For a given layer, you can toggle visibility, change its stacking order with the buttons on its legend entry. If you click Tools in the layer's legend, the Layer Settings dialog can be used to zoom, change opacity, change color, outline width, and alter the symology and labels.


Changing the basemap: Click the Basemap button on the top toolbar. A dialog will display from which you can change the current basemap and its opacity