Help Bald Eagle Search Map

Help using the Bald Eagle Search Map ( Virginia Fish and Wildlife Information Services, June 2013 )

Virginia land owners may use this interactive map depicting areas where coordinating human activity with Bald Eagle activity is important for promoting a thriving Bald Eagle population.

What is on this page?

the VaFWIS page header
1. portal links
  1. a link to Commonwealth of Virginia web page
  2. a link to Govenor of Virginia web page
  3. a link to DGIF web privacy policy
  4. a link to Contact Us
2. heading links
  1. DGIF logo image is a link to DGIF home page
  2. VaFWIS logo image is a link to VaFWIS home page
  3. title "Virginia Department of Game and Inland Fisheris" is a link to DGIF home page
  4. web search fucntion "Search Va DGIF"
    1. text area for search words
    2. "Go" button to activate a Google web search for documents
  5. title "FWIS" is a link to VaFWIS home page
a link to DGIF document "Bald Eagle Nests, Concentration Areas, and Communal Roosts in Virginia: A Guide for Landowners "
a link to Center for Conservation Biology web page - "online Eagle Nest Locator"
a link to DGIF document "Interpretation of Bald Eagle Nest Status: (Draft May 14, 2013 DGIF Staff)"
a map legend
1. a text area used to position the map center. The text may be
  1. Bald Eagle nest Identifying code
    1. nest codes are a string composed of 2 letters and 4 numbers
    2. as shown on the map as the nest "mouse rollover" title
  2. a string of numbers that are recognized as a coordinate. Please see http://vafwis.org/fwis/Help/VaFWIS_Help_Coordinates.html
    1. Latitude Longitude
      1. decimal degrees
      2. degrees,minutes
      3. degrees, minutes, seconds
    2. Unversal Transverse Mercator
      1. Meters East and North
      2. Meters East and North and Zone
        
        zone 17
        zone 18
  3. a string of numbers or characters sent to Google Geocoding Service.
    1. a zip code
    2. a town or city name
    3. a place or colloquial name
    4. a street address
    5. see secion Address Component Types at https://developers.google.com/maps/documentation/geocoding/
2. button "set as Map Center" change area displayed to location entered above
3. Bald Eagle nest symbols
  1. a check box - "click" to change from checked to unchecked or change unchecked to checked.
    1. show nest symbols when checked
    2. hide nest symbols when not checked
  2. pictures of nest symbols representing 3 DGIF activity status classes for Bald Eagle nests
    1. Recently Active - red triangle
    2. Activity Unknown - yellow triangle - the site has not been visited in recent years, but the nest was considered recently active at the time of the last site visit.
    3. Historic - green triangle - old records of nesting activity exist at this site.
4. Bald Eagle Concentration Areas and Communal Roost Areas
  1. a check box - "click" to change from checked to unchecked or change unchecked to checked.
    1. show area symbols when checked
    2. hide area symbols when not checked
  2. a "mouse draggable" control to change the transparancy of the area symbols.
    1. "drag" the control to the right to make the symbols more opaque.
    2. "drag" the control to the left to make the symbols more transparent.
  3. pictures of example areas ( when the transparency control is set in the middle )
    1. Communal Roosts as "green"
    2. Summer Concentration Areas as "red"
    3. concurrent Summer and Winter Concentration Areas as "violet"
    4. Winter Concentration Areas as "blue"
    5. concurrent Communal Roost areas with concentration areas are shown as dull "greenish""
5. Bald Eagle Nest buffer zones
  1. a check box - "click" to change from checked to unchecked or change unchecked to checked.
    1. show buffer symbols when checked and map zoom is one of 13, 14, 15, 16, 17, 18, or 19
    2. hide area symbols when not checked or when zoom not one of 13, 14, 15, 16, 17, 18, or 19
  2. 330 feet as specified in U.S. Fish and Wildlife Service 2007 National Bald Eagle Management Guidlines
  3. 660 feet as specified in U.S. Fish and Wildlife Service 2007 National Bald Eagle Management Guidlines
the map
1. a line depicting current mouse location and map zoom
2. the map provided by Google.com. see Google Maps Javascript API V3 Reference
  1. bounds are restricted such that some portion of the displayed map is within a "box" encompasing Virginia
3. Google Maps - control symbols
  1. pan - "click" to pan the map
    1. pan restricted such that some portion of the displayed map is within a "box" encompasing Virginia
  2. map type - "click" to change base map
    1. Map - cartography
    2. Satellite - imagery
  3. zoom - "click" to zoom in or out.
    1. in - lower zoom number gives larger area coverage with less detail
    2. out - highr zoom number gives smaller area coverage with greater detail
  4. North arrow
  5. Scale bar
  6. Google copyright notice
  7. a link to Google terms of use
  8. a link to Google to a form for requesting Google to add, delete, or change something on their map.
4. Google Maps mouse controls
  1. "drag" a point on the map activates pan function to show a differrent area
  2. "double-click" map activates zoom-in function at the point clicked
  3. "mouse wheel" activates zoom-in or zoom-out function at the current map center
  4. single "click" on map
    1. "click" on map removes information windows
    2. "click" on visible symbol
      1. "click" on Bald Eagle nest symbol activates information window as described under section I-E
      2. "click" on Communal Roosts and Concentration Areas activates information window as described under section VI-F
      3. Bald Eagle nest buffer has no "click" action
    3. "click" on map within 1000 feet of Bald Eagle Nests, when visible, activates an information window
      1. list of Bald Eagle nests within 1000 feet of point clicked
        
        DGIF Bald Eagle nest status symbol
        Nest identification code with "click" link to show an individual nest information window
5. Bald Eagle Nest symbols
  1. visibility controled by legend check box
  2. symbol designates DGIF nest activity status as described under section V-C-2
  3. "rollover" activates a title showing Bald Eagle nest identification code
  4. "click" activates information window
    1. DGIF Bald Eagle nest status symbol
    2. Nest Identification Code
    3. Observer name
    4. last observation date
    5. DGIF Bald Eagle nest status
    6. nest location
6. Communal Roost, Summer Concentration Area, and Winter Concentrationa Area symbols
  1. visibility controled by legend check box
  2. symbol as described under section 5-III-C
  3. "click" activates information window declaring
    1. state Communal Roost if present
    2. state Summer Concentration Area if present
    3. state Winter Concentration Area if present
7. Bald Eagle nest buffers
  1. visibility controled by legend check box
  2. visibility restricted to map zoom level. see section V-D-1
VaFWIS footer
1. a link to DGIF home page
2. a link to VaFWIS credits page
3. a link to VaFWIS dislaimer
4. a link to DGIF web privacy policy
5. notice of copyright by DGIF
6. a link If you have difficulty reading or accessing documents, please Contact Us for assistance.
resources employed to create this web page
1. Commonwealth of Virginia Department of Game and Inland Fisheries
  1. Bureau of Wildlife Resources, Statewide Resources
    1. Environmental Services Section
    2. Fish and Wildlife Information Services Section
2. College of William and Mary & Virginia Commonwealth University
  1. The Center for Conservation Biology
3. HTML-5
4. JavaScript
5. Google Maps API - https://developers.google.com/maps/documentation/javascript/reference
6. Google Fusion Tables - https://developers.google.com/fusiontables/
7. Google AJAX - https://developers.google.com/speed/libraries/devguide
8. VaFWIS - http://vafwis.org/fwis
  1. Perl - http://www.activestate.com/activeperl
  2. ImageMagick - http://www.imagemagick.org/