pixel_longitude Variable Comparison

report produced with glance, version 0.2.6.12
comparison generated Fri Oct 23 15:50:45 2009 by user evas on craackly.ssec.wisc.edu

file A:

path: /tmp/graemem/geocatNAV.Meteosat-8.2006237.120000.hdf
md5sum for file A: caf8874cc2ee87caf8da58943274b4d8
last modified: Fri Oct 23 15:06:55 2009

file B:

path: nav_geocat2.hdf
md5sum for file B: 5db00f839216229af8cf9ea8254b68ca
last modified: Thu Oct 22 19:55:46 2009

latitude: pixel_latitude
longitude: pixel_longitude
longitude/latitude comparison epsilon: 0.1

WARNING: 192 data points (0.001393% of all data) show possible mismatch in values stored in file a and file b longitude and latitude values. Depending on the degree of mismatch, some data value comparisons in this report may be distorted or spatially nonsensical. Please consider re-running this report and including an examination of your longitude and latitude variables with appropriate epsilons in order to analyze the significance of the difference.
View mismatching points in A's lon/lat system
View mismatching points in B's lon/lat system

Original Data

Comparison Information

variable name: pixel_longitude
epsilon value: 2e-05
"missing" data value in A: -999.0
"missing" data value in B: None

Statistical Summary

Finite Data Statistics
a_finite_count*: 10280909
a_finite_fraction*: 0.7461
b_finite_count*: 10280821
b_finite_fraction*: 0.7461
common_finite_count*: 10280821
common_finite_fraction*: 0.7461
finite_in_only_one_count*: 0
finite_in_only_one_fraction*: 0

General Statistics
a_missing_value*: -999
b_missing_value*: None
epsilon*: 2e-05
max_a*: 81.19
max_b*: 81.2
min_a*: -81.19
min_b*: -81.2
num_data_points*: 13778944
shape*: (3712, 3712)
spatially_invalid_pts_ignored_in_a*: 3498035
spatially_invalid_pts_ignored_in_b*: 3498123

Missing Value Statistics
a_missing_count*: 0
a_missing_fraction*: 0
b_missing_count*: 0
b_missing_fraction*: 0
common_missing_count*: 0
common_missing_fraction*: 0

NaN Statistics
a_nan_count*: 0
a_nan_fraction*: 0
b_nan_count*: 0
b_nan_fraction*: 0
common_nan_count*: 0
common_nan_fraction*: 0

Numerical Comparison Statistics
correlation*: 1
diff_outside_epsilon_count*: 9592376
diff_outside_epsilon_fraction*: 0.933
max_diff*: 0.2953
mean_diff*: 0.0004004
median_diff*: 0.0001813
perfect_match_count*: 3611
perfect_match_fraction*: 0.0003512
rms_diff*: 0.001356
std_diff*: 0.001296
trouble_points_count*: 9592376
trouble_points_fraction*: 0.6962