These data contain Kriging estimates for Cockle and Razor clam densities, lengths, and fresh weights.

zip-file contains:
data_krige_autumn2011.txt: estimates for the autumn 2011 sampling
data_krige_spring2012.txt: estimates for the spring 2012 sampling

grid: grid identifier
CockleNDensity.pred: cockle numeric density, in cockles/m^2
CockleNDensity.var: variance in cockle numeric density
CockleLength.pred: cockle length in mm
CockleLength.var: variance in cockle length
CockleWeight.pred: cockle fresh weight
CockleWeight.var: variance in cockle fresh weight
CockleFreshWeightDensity.pred: cockle fresh weight density in g/m^2
CockleFreshWeightDensity.var: variance in cockle fresh weight density
EnsisNDensity.pred: ensis numeric density, in individuals/m^2
EnsisNDensity.var: variance in ensis numeric density
EnsisLength.pred: ensis length in mm
EnsisLength.var: variance in ensis length
EnsisFreshWeightDensity.pred: ensis fresh weight density in g/m^2
EnsisFreshWeightDensity.var: variance in ensis fresh weight density
SeabedHeight: bathymetric height in cm NAP (Dutch mean sea level)
RDX: x-coordinate of the Dutch national grid (Rijksdriehoek-coordinates)
RDY: y-coordinate of the Dutch national grid (Rijksdriehoek-coordinates)
GridIndex: grid-point identifier
CockleAdult.ks: cockle numeric density, estimated using an alternative kernel smoothing method. Can be ignored.
EnsisAdult.ks: ensis numeric density, estimated using an alternative kernel smoothing method. Can be ignored.
Area: area of the grid point
FET: fractional exposure time of this patch (between 0 and 1, 0=always submerged, 1=always exposed)
Patch_ID_Quote: alternative grid-point identifier
Patch_ID: alternative grid-point indentifier
