Object Attribute Metadata
Value
A data frame describing object attributes stored in
tracking_algorithm output
Examples
object_info()
#> feature
#> 1 storms
#> 2 time
#> 3 ObjectID
#> 4 x
#> 5 y
#> 6 u
#> 7 v
#> 8 PC
#> 9 meanI
#> 10 maxI
#> 11 P25
#> 12 P75
#> 13 P90
#> 14 Gamma_scale
#> 15 Gamma_shape
#> 16 Volume
#> 17 area
#> 18 gridcount
#> 19 x_mass
#> 20 y_mass
#> 21 Cx
#> 22 Cy
#> 23 alpha
#> 24 a_meter
#> 25 b_meter
#> 26 aspect_ratio
#> 27 eccentricity
#> 28 orientation
#> 29 ellipse_area
#> 30 EX1x
#> 31 EX1y
#> 32 EX2x
#> 33 EX2y
#> 34 EY1x
#> 35 EY1y
#> 36 EY2x
#> 37 EY2y
#> 38 Neighour
#> 39 dist.Neighour
#> description
#> 1 Storm ID produced by concatenating the first time step in the system file with an underscore and the track number (charchter).
#> 2 The time step of the object (character).
#> 3 The object ID at the specific time step produced by the compound labelling (Integer).
#> 4 x-coordinate or longitude of the object geometric centroid (double).
#> 5 y-coordinate or latitude of the object's geometric centroid (double).
#> 6 Object displacement along the x or longitude direction obtained from PIV (double).
#> 7 Object displacement along the y or latitude direction obtained from PIV (double).
#> 8 The object structures in Well Known Text (WKT) are MultiPoint (XYZ), where Z is the precipitation value (character).
#> 9 Mean precipitation of the object in mm/hr (double).
#> 10 Maximum precipitation of the object in mm/hr (double).
#> 11 25th percentile precipitation of the object in mm/hr (double).
#> 12 75th Percentile precipitation of the object in mm/hr (double).
#> 13 90th Percentile precipitation of the object in mm/hr (double).
#> 14 The scale parameter of the fitted gamma distribution to the object precipitation values (double).
#> 15 The shape parameter of the fitted gamma distribution to the object precipitation values (double).
#> 16 The volume of precipitated water (cubic meter) is calculated by multiplying precipitation rates by grid cell area (double).
#> 17 Object's area in square meters (double).
#> 18 Count of grid points that resemble the object (integer).
#> 19 x-coordinate or longitude of the object's centre of mass (double).
#> 20 y-coordinate or latitude of the object's centre of mass (double).
#> 21 x-coordinate or longitude of the fitted ellipse centroid (double).
#> 22 y-coordinate or latitude of the fitted ellipse centroid (double).
#> 23 The rotation angle of the fitted ellipse in radian (double).
#> 24 Length of the fitted ellipse major axis in meters (double).
#> 25 Length of the fitted ellipse minor axis in meters (double).
#> 26 The ratio of the length of the minor axis to the length of the major axis (double).
#> 27 The ratio between the foci of the ellipse and its major axis length ranging between 0 for a circle and 1 for a staight line (double).
#> 28 Deviation angle from the north of the major axis of the fitted ellipse in degree (double).
#> 29 Fitted ellipse area in square meters (double).
#> 30 x-coordinate or longitude of the first point of the fitted ellipse major axis (double).
#> 31 y-coordinate or latitude of the first point of the fitted ellipse major axis (double).
#> 32 x-coordinate or longitude of the second point of the fitted ellipse major axis (double).
#> 33 y-coordinate or latitude of the second point of the fitted ellipse major axis (double).
#> 34 x-coordinate or longitude of the first point of the fitted ellipse minor axis (double).
#> 35 y-coordinate or latitude of the first point of the fitted ellipse minor axis (double).
#> 36 x-coordinate or longitude of the second point of the fitted ellipse minor axis (double).
#> 37 y-coordinate or latitude of the second point of the fitted ellipse minor axis (double).
#> 38 The ID of the nearest object (integer).
#> 39 The distance to the nearest object (double).