California Department of Fish and Wildlife

BIOS Tutorial: Mammal Corridor


Analyzing Southern California Mammal Corridor Data

In the BIOS Mapviewer:

  • Open the BIOS Data Catalog by clicking the "Add BIOS Layers" tool (1).
  • Then, filter the list of Available Layers by selecting the "Layer Name" filter field (2) and entering the search term "corridor" in the Search Term box (3).
  • Add the filter (4) and then check the "Mammal Corridors" item (5) to add it to the "Checked Layers" box on the right.
  • Then click the "Add Checked Layers to Map" button (6) to add this layer to the map.

Back in the map:

  • Click the checkbox next to the added layer name to turn it on (7).
  • Click on the layer name text to make it the "Active Layer".
  • Finally, click the "Refresh Map" button to reflect your changes.

Next, examine the mammal corridor data more closely:

  • Select the "Zoom" tool (8), and anchoring with the mouse button, draw a zoom box about the size shown at (9). Attempt to capture an area and scale similar to the map extent in the image (10).
  • Manually set the map scale by entering the value "175,000" in the map scale entry box (11) and pressing the enter key.

This analysis example illustrates the use of two parameters in a query. In this case to determine season-specific detections of species along a mammal corridor in southern California:

  • Open the "Attribute query" tool (12) and clear any old query parameters from the last query by clicking on the "Clear" button below the left query panel (13).
  • Construct the query by selecting (double-clicking) "Bobcat" from the left query panel (14), the "=" operator from the center query panel (15), and the value "1" (meaning present) from the right query panel (16).
  • Add the operator "and" (16) and complete the remainder of the query by double-clicking the "season" item in the right query panel (17), the "=" operator (17), and the "fall" value from the left query panel (18).
  • Execute the query (19) and note the results on the map (20).