NGA 2700 chart summary for Sat Sep 24 17:11:25 GMT 2011

processed: 1419

charts
evaluated: 1279 charts

pxhoriz: mean 1.00000 stddev 0.00015

>5*sd: 24311 93032 55001

>4*sd: 36005 21182 53091 56190

>3*sd: 42740 44187 54085 400 51150 107 51022 108 20 29123 621

pxverti: mean 0.99999 stddev 0.00014

>4*sd: 53290 56190 53287 24319 53266 43340

>3*sd: 18766 14003 26001 21182 61190 92200 44342 55001 22036 57220

pxsquare: mean 0.99999 stddev 0.00017

>3*sd: 63354 24381 93032 703 52160 53203

ratio: mean 1.00492 stddev 0.00178

censored: skipped 115 charts: 11 62 70 105 106 121 124 125 126 145 301 520 521 522 524 526 532 622 623 701 707 800 21141 21161 21621 21641 22100 22314 22404 22440 22528 22531 22533 22541 22542 22549 23051 23121 24121 24152 24154 24159 24215 24444 24511 26125 29282 29322 29324 29325 42036 42046 54289 54303 57022 61003 63015 63361 71009 71012 71018 71036 71140 71330 71350 71400 71455 73034 74024 76201 81016 81127 81145 81303 81329 81427 81511 81563 81565 81576 81616 81729 81737 81791 81796 82025 82304 82384 82534 82564 83010 83020 83039 83052 83105 83218 83392 83495 83555 91020 91030 91060 91096 91314 91326 91407 92025 92030 92033 92040 92050 92140 92190 92560 96036

notmercator: skipped 25 charts: 14221 17421 18419 28164 29323 43064 43263 43344 43363 43371 43377 43378 43386 44192 44310 54362 54364 54368 55064 56191 76171 76181 81327 82071 91286

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Processed all charts with status:

+ 'Rectangular, doable'

+ 'Rectangular, partly doable - rectangular insets'

+ 'Rectangular, partly doable - non-rectangular insets'

+ 'Rectangular, not doable in Phase 1 because of special PLY's needed'

+ 'Chart done, checked and locked'

'processed' is the number of charts processed

'evaluated' is the number of processed charts that didn't get skipped

'pxhoriz' compares the lengths of the N and S edges, which should be equal

'pxverti' compares the lengths of the E and W edges, which should be equal

'pxsquare' compares the lengths of the NE-SW and NW-SE diagonals, which should be equal

'ratio' compares the aspect ratios of the REF point rectangle and the projected corner

+ coordinates, which should be equal

All those 'shoulds' are assuming a rectangular chart area in mercator projection.

'>n*sd' charts are greater than n standard deviations from the mean

'>5*sd' should be none

'>4*sd' should be none

'>3*sd' should be 3/1000 of the charts processed

All those 'shoulds' are assuming a normal distribution.

'censored' are outliers previously checked and looked 'okay',

+ there may still be a problem with data entry, or the chart may just be crooked.

'notmercator' are charts that aren't mercator or unknown