Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska Peninsula and Nunivak Island

공공데이터포털

Provided here are two vector geospatial datasets that characterize the distribution of: (1) eelgrass (Zostera marina) and (2) seaweeds in waters adjacent to four National Wildlife Refuges in Alaska (Izembek NWR, Alaska Peninsula-Becharof NWR, Alaska Maritime NWR, and Yukon Delta NWR). These data were derived from satellite imagery (Landsat 5 TM and Landsat 7 ETM+) acquired on four different days (2002-08-02, 2006-07-20, 2007-06-04, 2009-08-04). After pre-processing, imagery was classified into land cover categories (eelgrass, seaweed, mud/sand, and channel). The eelgrass and seaweed distribution data were then extracted from the raster grid and converted to vector data.

Mapping Data of Eelgrass (Zostera marina) Distribution, Togiak National Wildlife Refuge, Alaska

공공데이터포털

Provided here are two vector geospatial datasets that characterize the distribution of eelgrass (Zostera marina) and seaweeds in waters adjacent to Togiak National Wildlife Refuge, Alaska. These data were derived from: (1) aerial photo imagery acquired on five different summer days 2005-2013 and (2) satellite imagery (Ikonos-2 and Quickbird-2) acquired on five different summer days 2002-2004. Additionally, the ortho-rectified photomosaics of the aerial photographs used for analysis are provided.

Mapping Data of Eelgrass (Zostera marina) Distribution, Togiak National Wildlife Refuge, Alaska

공공데이터포털

Provided here are two vector geospatial datasets that characterize the distribution of eelgrass (Zostera marina) and seaweeds in waters adjacent to Togiak National Wildlife Refuge, Alaska. These data were derived from: (1) aerial photo imagery acquired on five different summer days 2005-2013 and (2) satellite imagery (Ikonos-2 and Quickbird-2) acquired on five different summer days 2002-2004. Additionally, the ortho-rectified photomosaics of the aerial photographs used for analysis are provided.

Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska and Baja California, Mexico

공공데이터포털

This data release includes 4 child items with geospatial datasets that characterize the distribution of eelgrass (Zostera marina) and seaweeds in waters of southwestern Alaska and Baja California, Mexico. Child Item 1: "Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska Peninsula and Nunivak Island" Child Item 2: "Mapping Data of Eelgrass (Zostera marina) Distribution, Togiak National Wildlife Refuge, Alaska" Child Item 3: "Mapping Data of Eelgrass (Zostera marina) Distribution, Baja California, Mexico" Child Item 4: "Habitat Classification Data of Five Bays Along the West Coast of Baja California, Mexico"

Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska and Baja California, Mexico

공공데이터포털

This data release includes 4 child items with geospatial datasets that characterize the distribution of eelgrass (Zostera marina) and seaweeds in waters of southwestern Alaska and Baja California, Mexico. Child Item 1: "Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska Peninsula and Nunivak Island" Child Item 2: "Mapping Data of Eelgrass (Zostera marina) Distribution, Togiak National Wildlife Refuge, Alaska" Child Item 3: "Mapping Data of Eelgrass (Zostera marina) Distribution, Baja California, Mexico" Child Item 4: "Habitat Classification Data of Five Bays Along the West Coast of Baja California, Mexico"

Eelgrass (Zostera marina) Maps from 2016 and 2020, Izembek Lagoon, Alaska

공공데이터포털

This data package includes 40 geospatial rasters (maps) depicting various metrics about eelgrass (Zostera marina) coverage at Izembek Lagoon, Alaska, during 2016 and 2020. Two maps were produced from two Sentinel-2 satellite images collected on July 1, 2016, and August 14, 2020. Spectral classes derived from each satellite image were annotated and mapped based on data collected in the field at plots within each spectral class.

Eelgrass (Zostera marina) Maps from 2016 and 2020, Izembek Lagoon, Alaska

공공데이터포털

This data package includes 40 geospatial rasters (maps) depicting various metrics about eelgrass (Zostera marina) coverage at Izembek Lagoon, Alaska, during 2016 and 2020. Two maps were produced from two Sentinel-2 satellite images collected on July 1, 2016, and August 14, 2020. Spectral classes derived from each satellite image were annotated and mapped based on data collected in the field at plots within each spectral class.

Point Sampling Data for Eelgrass (Zostera marina) and Seaweed Distribution and Abundance in Bays Adjacent to the Alaska Peninsula-Becharof National Wildlife Refuges, Alaska, 2010

공공데이터포털

These data are in six tables relating to surveys of eelgrass beds in Chignik Lagoon and Mud Bay, Alaska Peninsula-Becharof National Wildlife Refuges. The tables provide environmental conditions, eelgrass abundance, distribution, and measurements used to estimate overall biomass.

Point Sampling Data for Eelgrass (Zostera marina) and Seaweed Distribution and Abundance in Bays Adjacent to the Alaska Peninsula-Becharof National Wildlife Refuges, Alaska, 2010

공공데이터포털

These data are in six tables relating to surveys of eelgrass beds in Chignik Lagoon and Mud Bay, Alaska Peninsula-Becharof National Wildlife Refuges. The tables provide environmental conditions, eelgrass abundance, distribution, and measurements used to estimate overall biomass.

Point Sampling Data for Eelgrass (Zostera marina) and Seaweed Distribution and Abundance in Bays Adjacent to the Alaska Peninsula-Becharof National Wildlife Refuges, Alaska, 2010

공공데이터포털

These data are in six tables relating to surveys of eelgrass beds in Chignik Lagoon and Mud Bay, Alaska Peninsula-Becharof National Wildlife Refuges. The tables provide environmental conditions, eelgrass abundance, distribution, and measurements used to estimate overall biomass.