Aerial surveys of waterbirds in Alaska 1957-94 : population trends and observer variability
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Information and Technology Report↗
Geology topics
J.I. Hodges
Publications and source records attributed to J.I. Hodges.
Locating waterfowl observations on aerial surveys
We modified standard aerial survey data collection to obtain the geographic location for each waterfowl observation on surveys in Alaska during 1987-1993. Using transect navigation with CPS (global positioning system), data recording on continuously running tapes, and a computer data input program, we located observations with an average deviation along transects of 214 m. The method provided flexibility in survey design and data analysis. Although developed for geese nesting near the coast of the Yukon-Kuskokwim Delta, the methods are widely applicable and were used on other waterfowl surveys in Alaska to map distribution and relative abundance of waterfowl. Accurate location data with GIS analysis and display may improve precision and usefulness of data from any aerial transect survey.
Wildlife Society Bulletin↗