The MiddleFork04.ssn data folder contains the spatial, attribute,
and topological information needed to construct an SSN object using
the SSN2 package.
edges are a modified version of the United States
National Hydrography Dataset
(http://nhd.usgs.gov/). sites, pred1km and CapeHorn
are unpublished United States Forest Service data.
The MiddleFork04.ssn folder contains five geopackages:
edges: geopackage with LINESTRING geometry representing the stream network
sites: geopackage with POINT geometry representing the observed site locations
pred1km: geopackage with POINT geometry prediction site locations at approximately 1km intervals throughout the stream network
CapeHorn: geopackage with POINT geometry representing prediction site locations on the Cape Horn River
The MiddleFork04.ssn includes two text files, netID1.txt and netID2.txt, which contain the
topological information for the two stream networks in the Middle Fork 2004
dataset.
The distance folder contains four folders that store the hydrologic
distance matrices for each of the point datasets (obs, CapeHorn, and pred1km). See ssn_create_distmat() for a
detailed description of the distance matrix file structure.
Attribute data is also stored within each of the spatial datasets. The column names are defined as follows:
edges:
rid: Reach identifier
COMID: Common identifier of an NHD feature or relationship
GNIS_Name: Feature name as found in the Geographic Names Information System
REACHCODE: Unique identifier for a reach. The first 8 digits contain the identfier for the HUC8 and the last 6 digits are a unique within-HUC8 identifier for the reach
FTYPE: three-digit integer used to classify hydrography features in the NHD and define subtypes
FCODE: Numeric code that contains the feature type and its attributes as found in the NHDFCode lookup table
AREAWTMAP: Area weighted mean annual precipitation (mm) at the lowermost location on the edge
SLOPE: Slope of the edge (cm/cm)
rcaAreaKm2: Reach contributing area (km2) for each edge feature. The RCA represents the land area that drains directly to the edge feature
h2oAreaKm2: Watershed area (km2) for the lowermost location on the edge feature
areaPI: Segment proportional influence value, calculated using watershed area (h2oAreaKm2)
afvArea: Additive function value, calculated using areaPI
upDist: Distance from the stream outlet (most downstream location in the the stream network) to the uppermost location on the line segment
Length: Length of line segment (m)
netID: Network identifier
sites:
rid: Reach identifier of the edge the site resides on
pid: Point identifier
STREAMNAME: Stream name
COMID: Common identifier of an NHD feature or relationship
AREAWTMAP: Area weighted mean annual precipitation (mm) at lowermost location on the line segment where the site resides
SLOPE: Slope of the line segment (cm/cm) where the site resides
ELEV_DEM: Elevation at the site based on a 30m DEM
Source: Source of the data - relates to the ID field of the source table
Summer_mn: Overall summer mean termperature (C) of the deployment
MaxOver20: Binary variable: 1 represents the maximum summer temperature was greater than 20C and 0 indicates that it was less than 20C
C16: Number of times daily stream temperature exceeded 16C
C20: Number of times daily stream temperature exceeded 20C
C24: Number of times daily stream temperature exceeded 24C
FlowCMS: Average stream flow (cubic meters per sec) for August, by year, from 1950-2010 across 9 USGS gauges in the region
AirMEANc: Average mean air temperature (C) from July 15 - August 31, from 1980-2009 across 10 COOP air stations within the domain
AirMWMTc: Average maximum air temperature (C) from July 15 - August 31, from 1980-2009 across 10 COOP air stations within the domain. MWMT = maximum 7-day moving average of the maximum daily temperature (i.e. maximum of all the 7-day maximums)
rcaAreaKm2: Reach contributing area (km2) for each edge feature the site resides on. The RCA represents the land area that drains directly to the edge feature
h2oAreaKm2: Watershed area (km2) for the lowermost location on the edge feature the site resides on
ratio: Site ratio value; provides the proportional distance from the downstream node of the edge to the site location
upDist: Distance upstream from the stream outlet (m)
afvArea: Additive function value calculated using waterhsed area (h2oAreaKm2)
locID: Location identifier
netID: Stream network identifier
snapdist: Distance (m) that site was moved when it was snapped to the edges
pred1km and CapeHorn:
rid: Reach identifier of the edge the site resides on
pid: Point identifier
COMID: Common identifier of an NHD feature or relationship
GNIS_Name: Feature name of the edge the site resides on, as found in the Geographic Names Information System
AREAWTMAP: Area weighted mean annual precipitation (mm) at lowermost location on the line segment where the site resides
SLOPE: Slope of the line segment (cm/cm) where the site resides
ELEV_DEM: Elevation at the site based on a 30m DEM
rcaAreaKm2: Reach contributing area (km2) for each edge feature the site resides on. The RCA represents the land area that drains directly to the edge feature
h2oAreaKm2: Watershed area (km2) for the lowermost location on the edge feature the site resides on
ratio: Site ratio value; provides the proportional distance along the edge to the site location
upDist: Distance upstream from the stream outlet (m)
afvArea: Additive function value calculated using watershed area (h2oAreaKm2)
locID: Location identifier
netID: Stream network identifier
snapdist: Distance (m) that site was moved when it was snapped to the edges
FlowCMS: Average stream flow (cubic meters per sec) for August, by year, from 1950-2010 across 9 USGS gauges in the region
AirMEANc: Average mean air temperature (C) from July 15 - August 31, from 1980-2009 across 10 COOP air stations within the domain
AirMWMTc: Average maximum air temperature (C) from July 15 - August 31, from 1980-2009 across 10 COOP air stations within the domain. MWMT = maximum 7-day moving average of the maximum daily temperature(i.e. maximum of all the 7-day maximums)
mf04p for the Middle For 04 data as an SSN object.