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shelfData20150423.Rmd
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---
output: pdf_document
---
#Shelf Data Project Metadata
##Last updated: April 23, 2015
************
#Data Definitions:
browseURL('https://github.com/BKreakie/shelfData/blob/master/shelfData20150423.Rmd')
************
The data can be loaded into R with the following code:
************
#Get the Data
library(RCurl)
x<-getURL("https://github.com/BKreakie/shelfData/blob/master/modern_04212015.csv")
modernData<-read.csv(text=x)
x<-getURL("https://github.com/BKreakie/shelfData/blob/master/historic_04212015.csv")
historicData<-read.csv(text=x)
************
**Shelf Data**: This work is based on two main data sets that were collected by two different sampling effort. The historic data was collected between 2000 and 2005 and had fewer variables measures. The modern data was collected between 2010 and 2013.
'historic_04212015.csv': 235 obs. of 16 variables: NOTE: some missing values
'modern_04212015.csv': 209 obs. of 31 variables: NOTE: some missing values
************
###Modern Data
**Field** | **Definition**
------------- | -------------
FID_ | Sample identifier
Cruise | ID for NOAA sampling cruise
month | Month in which the sample was collected
year | Year in which the sample was collected
Station | ID for NOAA sample location
position | Whether sample was collected at the 'Surface (Surf)' or 'Deep'
lat | Latitude
long | Longitude
d15N | Mean stable isotope measure for nitrogen
d13C | Mean stable isotope measure for carbon
iso | Filtered for iso (ml)
Chl | Chlorophyll (flo-thru)
discreteCh | Chlorophyll (discrete)
NO3 | Nitrate
NO2 | Nitrite
sumN | Total of summed nitrate and nitrite
PO4 | Phosphate
NH4 | Ammonium (dropped from anaylsis due to contamination)
distMeters| Distance (in meters) from sample point to any land
PN | Particulate Nitrogen
Season | season of the year based on month sampled
temp | Surface tempture
sal | Salinity
nearLand | Distance (in meters) from sample point to coast line
densityLar | Density of population centers based on large radius
densitySma | Density of populatation centers based on small radius
Ches | Euclidead distance to Chesapeake Bay (centroid)
Del | Euclidead distance to Delaware bay
Hud | Euclidead distance to Hudson Bay
LI | Euclidead distance to Long Island Sound
Nar | Euclidead distance to Narragansett Bay
Bos | Euclidead distance to Boston Harbor
###Historic Data
**Field** | **Definition**
------------- | -------------
FID_ | Sample identifier
month | Month in which the sample was collected
year | Year in which the sample was collected
lat | Latitude
long | Longitude
d15N | Mean stable isotope measure for nitrogen
d13C | Mean stable isotope measure for carbon
distMeters| Distance (in meters) from sample point to any land
nearLand | Distance (in meters) from sample point to coast line
densityLar | Density of population centers based on large radius
densitySma | Density of populatation centers based on small radius
Ches | Euclidead distance to Chesapeake Bay (centroid)
Del | Euclidead distance to Delaware bay
Hud | Euclidead distance to Hudson Bay
LI | Euclidead distance to Long Island Sound
Nar | Euclidead distance to Narragansett Bay
Bos | Euclidead distance to Boston Harbor