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Folders: ROOT > ScienceBase Catalog > US Fish and Wildlife Service (USFWS) > Programs > Migratory Birds > Region 7 U.S. Fish and Wildlife Service Migratory Bird Management > USFWS MBM Alaska Waterfowl Program > Fall Steller's Eider Overhead Survey at Nelson Lagoon, Alaska, 2020 ( Show all descendants )

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_ScienceBase Catalog
__US Fish and Wildlife Service (USFWS)
___Programs
____Migratory Birds
_____Region 7 U.S. Fish and Wildlife Service Migratory Bird Management
______USFWS MBM Alaska Waterfowl Program
_______Fall Steller's Eider Overhead Survey at Nelson Lagoon, Alaska, 2020
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Decide whether or not to fly the survey. This is a somewhat subjective call, but current and forecasted weather, especially ceiling height and cloud density, visibility, wind and rain are the main components that go into making that decision. Wind >15kts, ceiling <2,000ft, steady rain or visibility <5 mi generally results in a “no go” for flying the survey at that time. If any of these conditions are forecasted in the following 4-6 hrs, also generally calls for waiting for better conditions or forecasts.If a survey is a “go”, the survey aircraft departs Nelson Lagoon airstrip and flies east toward transect number 1. All photographic gear, cameras, computers, screens have been previously set up and software tested....
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We have used the software program ‘ImageJ’ to count birds in the overhead photographs taken for the STEI_Overhead survey. Following is a description of this software. Links to the ImageJ guide and specific detailed instructions for counting these photographs are linked to and include:Counting sea ducks with ImageJ.docxImageJ_user-guide_2020.pdfAs well as another quick guideSoftware description ImageJ is a Java-based image processing program developed at the NIH and LOCI. ImageJ was designed with an open architecture that provides extensibility via Java plugins and recordable macros. ImageJ can be run as an online applet, a downloadable application, or on any computer with a Java 5 or later virtual machine. The source...
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This is a table that contains all eight Aviatrix, GPS & camera data fields, including camera angle, transect number, sequence, computer time, camera time, latitude, longitude, and altitude. This table will be joined with the table that contains survey and file data and observer results to comprise the final data table that will be run through the bird analyses.
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These are the geospatial files used to construct the transects (the survey polygon) and the transect files themselves, created and exported using AeroScientific software. These files include:Survey area polygon (.xml file created from an ArcGIS mxd), survey transects (.xml and .fpl files), both created in AeroScientific’s FlightPlanner software as described in record 2.
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Currently, the Aviatrix software produces data that is recorded and associated with each trigger point, but does not connect data from the camera (i.e., camera name) to these records. In order to calculate area for each photo that contains STEI, we would like to know the altitude of that photo. Therefore, we need to combine the Aviatrix data for each trigger point to the photo name that was taken at that trigger point. Spatial data collected by the GPS in the Aviatrix triggerbox along with camera and computer clock data is assembled to align spatial data (altitude and position data) with the imagery, mainly in order to assign the correct altitude to the images to calculate ground area within the photo frame.To do...
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All of the individual observer datasheets (‘PRI’, ‘SEC’, ‘TER’ and ‘ERR’, products described elsewhere in this document) and the camera and spatial data (also described in this document) are combined into this final data table that will be used for analysis.
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Several photo ‘observers’ examine images and enter data based on what they see in the imagery. The first observer, ‘PRI’ = the primary observer, looks at all photos taken and records bird presence/absence. The ‘SEC’ = the secondary observer, speciates the birds found by the primary observer, and counts the Steller’s eiders. The ‘TER’ = the tertiary observer, reviews the speciation and/or counts of the secondary observer as a check. The ‘ERR’ = the error rate observer, independently records bird presence/absence in a subset (10%) of the photos that the primary observer viewed as a check on the PRI accuracy. When all are complete, they are combined into the final data table, Combined Datasheet_STEI Overhead, that...
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A survey area polygon was constructed and used to create a series of survey transects bounded by the polygon. The polygon was created in ArcGIS (can also be built in Google Maps or Google Earth). The AeroScientific software FlightPlanner used this polygon to create transects within the polygon. See linked document for detailed instructions for these processes. This document is:Construction of STO transects_metadata.docx
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After each survey, camera memory cards are downloaded and organized into folders by YEAR, SURVEY, CAMERA, BATCH, PHOTO#. Then, files are renamed to give every file in every survey and every year a unique name. Naming convention consists of: survey name, survey year, month and day, survey number, camera number, batch number, photo number. Thus, all photo names will follow the convention: STO18_1004_S1C1B1_0237.JPG which in this case = STEI Overhead in 2018, Month & Day, Survey#, Camera#, Batch#, Image#. These file names are entered into a spreadsheet along with other variables in preparation for analysis.As photos are analyzed by various observers, different subsets of photos are placed in separate folders for observers...
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There are four kinds of observers that will be examining photos for birds, and four separate datasheets will contain results from these observers for each survey. The first observer, ‘PRI’ = the primary observer, looks at all photos taken and records bird presence/absence. The ‘SEC’ = the secondary observer, speciates the birds found by the primary observer, and counts the Steller’s eiders. The ‘TER’ = the tertiary observer, reviews the speciation and/or counts of the secondary observer as a check. The ‘ERR’ = the error rate observer, independently records bird presence/absence in a subset (10%) of the photos that the primary observer viewed as a check on the PRI accuracy. When all are complete, they are combined...
    map background search result map search result map Camera Operator Protocol for Steller's Eider Overhead Survey in Nelson Lagoon, Alaska Observer Data Results for Overhead Steller's Eider Survey Survey Design Files for Steller's Eider Overhead Survey at Nelson Lagoon, Alaska Combining Aviatrix with Photo Data for Steller's Eider Overhead Survey Observer Analysis Instructional Protocol for Steller's Eider Overhead Survey Combine Data for Overhead Steller's Eider Survey of Nelson Lagoon, Alaska Counting Birds in Photographs Protocol with ImageJ Software for Steller's Eider Overhead Survey Photo Files Organization and Preservation Protocol for Steller's Eider Overhead Survey Spatial Data for Steller's Eider Overhead Survey at Nelson Lagoon, Alaska Transect Design Protocol for Steller's Eider Overhead Survey in Nelson Lagoon, Alaska Camera Operator Protocol for Steller's Eider Overhead Survey in Nelson Lagoon, Alaska Observer Data Results for Overhead Steller's Eider Survey Survey Design Files for Steller's Eider Overhead Survey at Nelson Lagoon, Alaska Combining Aviatrix with Photo Data for Steller's Eider Overhead Survey Observer Analysis Instructional Protocol for Steller's Eider Overhead Survey Combine Data for Overhead Steller's Eider Survey of Nelson Lagoon, Alaska Counting Birds in Photographs Protocol with ImageJ Software for Steller's Eider Overhead Survey Photo Files Organization and Preservation Protocol for Steller's Eider Overhead Survey Spatial Data for Steller's Eider Overhead Survey at Nelson Lagoon, Alaska Transect Design Protocol for Steller's Eider Overhead Survey in Nelson Lagoon, Alaska