Intro to Raster Data

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Raster plot with ggplot2 using the viridis color scale
Raster plot with ggplot2 using the viridis color scale

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Raster plot with ggplot2 using the viridis color scale
Raster plot with ggplot2 using the viridis color scale

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Raster plot with ggplot2 using the viridis color scale on the original CRS
Raster plot with ggplot2 using the viridis color scale on the original CRS

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UTM zones in the USA.
The UTM zones across the continental United States. From: https://upload.wikimedia.org/wikipedia/commons/8/8d/Utm-zones-USA.svg

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Multi-band raster image

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Raster plot showing location of extreme values
Raster plot showing location of extreme values

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Plot Raster Data

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Open and Plot Vector Layers

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Extent image

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Explore and Plot by Vector Layer Attributes

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Map of the large beds in the study area.
Map of the large beds in the study area.

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Map of the large beds where they are classified by percent cover.
Map of the large beds where they are classified by percent cover.

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Map of the boardwalks in the study area.
Map of the boardwalks in the study area.

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Map of the dense seagrass beds where beds are colored by size in hectares.
Map of the dense seagrass beds where beds are colored by size in hectares.

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Roads and trails in the area.
Roads and trails in the area.

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Figure 8

Map of the beds in the 2022 area with large-font and border around the legend.
Map of the beds in the 2022 area with large-font and border around the legend.

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2013 Seagrass Beds in Casco Bay.
2013 Seagrass Beds in Casco Bay.

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Plot Multiple Vector Layers

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Handling Spatial Projection & CRS

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Maps of the United States using data in different projections. Source: opennews.org, from: https://media.opennews.org/cache/06/37/0637aa2541b31f526ad44f7cb2db7b6c.jpg
Maps of the United States using data in different projections. Source: opennews.org, from: https://media.opennews.org/cache/06/37/0637aa2541b31f526ad44f7cb2db7b6c.jpg

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Convert from .csv to a Vector Layer

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Extracting Data from Rasters using Vectors

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Extent illustration Image Source: National Ecological Observatory Network (NEON)

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Image shows raster information extraction using 20m polygon boundary. Image Source: National Ecological Observatory Network (NEON)

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Image shows raster information extraction using 20m buffer region. Image Source: National Ecological Observatory Network (NEON)

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Work with Multi-Band Rasters

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Image Stretch

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Image Stretch light

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Raster Calculations

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the visible spectrum in nm
the visible spectrum in nm

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chl eqn
chl eqn

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CARI eqn Let’s see how simple it is to make these work for us!

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New Hampshire and Southern Maine in Winter 2023
New Hampshire and Southern Maine in Winter 2023

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