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Open_Data/St__Johns__Flagler_and_Volusia_counties_1991_1993_Manatee_Distribution_Survey_Observations (MapServer)

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Service Description: Aerial distribution surveys are used by marine mammal biologists from FWC and other agencies to determine the seasonal distribution of manatees. Most surveys are conducted from small, four-seat, high-winged airplanes (Cessna 172 or 182) flying at a height of 500-1000 ft at a speed of 70-90 kts. Small helicopters may be used instead of fixed wing aircraft in urban areas or where waters are particularly opaque and hovering may be required. Flights are usually six hours long and are most commonly flown every two weeks for two years. The surveys are designed to maximize the manatee counts by concentrating on shallow nearshore waters around the state where manatees and their primary food source, sea grasses, are located. Flight paths curve parallel to the shoreline, and the airplane circles when manatees are spotted until a count of the number of animals in each group is obtained. Offshore waters are usually not surveyed. Dolphin and sea turtle sightings are recorded opportunistically. All aerial data are recorded on paper maps and entered into a GIS shapefile for spatial analysis. GIS is a computer software system for representing data spatially and for conducting spatial analyses. Surveys of St. Johns, Flagler and Volusia County were flown twice a month from March 1991 to November 1993. FWC staff members were observers for these flights. The survey area includes the coastal, estuarine, and riverine waters of St. Johns, Flagler and Volusia counties. The St. Johns River or tributaries were not included. The survey extended from the Duval-St. Johns county line south to Mosquito Lagoon at the Volusia-Brevard county line. The water bodies included in the survey are Tolomato, Guana, Matanzas, San Sebastian, Tomoka and Halifax rivers; Turnbull Bay and Salt Run; Spruce Creek and Palm Coast canal systems.

Map Name: Open Data Manatee

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Layers: Description: Aerial distribution surveys are used by marine mammal biologists from FWC and other agencies to determine the seasonal distribution of manatees. Most surveys are conducted from small, four-seat, high-winged airplanes (Cessna 172 or 182) flying at a height of 500-1000 ft at a speed of 70-90 kts. Small helicopters may be used instead of fixed wing aircraft in urban areas or where waters are particularly opaque and hovering may be required. Flights are usually six hours long and are most commonly flown every two weeks for two years. The surveys are designed to maximize the manatee counts by concentrating on shallow nearshore waters around the state where manatees and their primary food source, sea grasses, are located. Flight paths curve parallel to the shoreline, and the airplane circles when manatees are spotted until a count of the number of animals in each group is obtained. Offshore waters are usually not surveyed. Dolphin and sea turtle sightings are recorded opportunistically. All aerial data are recorded on paper maps and entered into a GIS shapefile for spatial analysis. GIS is a computer software system for representing data spatially and for conducting spatial analyses. Surveys of St. Johns, Flagler and Volusia County were flown twice a month from March 1991 to November 1993. FWC staff members were observers for these flights. The survey area includes the coastal, estuarine, and riverine waters of St. Johns, Flagler and Volusia counties. The St. Johns River or tributaries were not included. The survey extended from the Duval-St. Johns county line south to Mosquito Lagoon at the Volusia-Brevard county line. The water bodies included in the survey are Tolomato, Guana, Matanzas, San Sebastian, Tomoka and Halifax rivers; Turnbull Bay and Salt Run; Spruce Creek and Palm Coast canal systems.

Service Item Id: ce156d02543c4919977368a208130ab1

Copyright Text: Flights were flown and data were collected by FWC staff. Data were entered and verified by FWC staff. Use of these data must be credited in any reports or other written publications by the following sentence: "Manatee specific data used in analyses were collected under scientific research permit #MA773494 issued to FWC-FWRI."

Spatial Reference: 102967  (6439)  LatestVCSWkid(0)


Single Fused Map Cache: false

Initial Extent: Full Extent: Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info: Supports Dynamic Layers: true

MaxRecordCount: 2000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, geoJSON, PBF

Supports Query Data Elements: true

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true



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