CBS SportsTicker shots vs. NHL official Shots

Shot comparison for http://www.nhl.com/scores/htmlreports/20062007/PL020008.HTM

MM:SS DIFF T1 FT T2 X Y NHL Player CBS Player 00:18:20 - 63 26 - DRAPER - - - - 100 37 21 - N. Lidstrom 00:17:08 -10 182 59 172 -48 -17 LIDSTROM N. Lidstrom 00:16:26 -7 221 36 214 10 19 ZETTERBERG H. Zetterberg 00:15:51 -11 260 54 249 45 -25 SALO K. Bieksa 00:15:30 -14 284 57 270 43 9 BIEKSA K. Bieksa 00:15:17 -7 290 42 283 8 9 NASLUND D. Sedin 00:15:07 -7 300 44 293 1 -7 SEDIN M. Naslund 00:14:12 - 313 10 - NASLUND - 00:14:12 -4 352 60 348 45 -20 LIDSTROM N. Lidstrom 00:12:14 3 463 58 466 44 -21 FITZPATRICK B. Morrison 00:09:05 - 516 61 - SALO - 00:09:05 -6 661 40 655 36 -10 LILJA K. Draper 00:06:29 -2 813 17 811 9 -11 DATSYUK P. Datsyuk 00:04:55 0 905 15 905 5 -3 DRAPER K. Draper 00:04:45 -7 922 63 915 45 -23 MITCHELL W. Mitchell 00:01:18 -12 1134 29 1122 17 -3 ZETTERBERG H. Zetterberg - - - 1144 36 -25 - M. Samuelsson 00:00:05 0 1195 13 1195 82 1 NASLUND M. Naslund 00:19:43 -3 1220 11 1217 11 10 COOKE M. Cooke 00:17:48 -13 1345 12 1332 40 6 LINDEN M. Naslund 00:17:35 -2 1347 28 1345 6 0 GREEN T. Linden 00:16:38 -20 1422 22 1402 15 -10 HUDLER J. Hudler 00:15:56 -26 1470 38 1444 36 -12 SEDIN H. Sedin 00:14:19 0 1541 47 1541 29 4 SALO S. Salo 00:14:11 -14 1563 13 1549 42 4 WILLIAMS P. Datsyuk 00:14:02 -10 1568 36 1558 10 -5 DATSYUK J. Williams 00:10:45 - 1631 30 - MORRISON - 00:10:45 - 1718 38 - ZETTERBERG - 00:10:45 -10 1765 17 1755 5 -9 SCHNEIDER M. Schneider 00:09:26 -6 1840 45 1834 35 4 SAMUELSSON M. Samuelsson 00:07:15 - 1848 16 - CLEARY - 00:07:15 -21 1986 14 1965 6 -3 HUDLER J. Hudler 00:06:59 -14 1995 12 1981 10 5 ZETTERBERG H. Zetterberg 00:04:05 0 2155 44 2155 14 18 ZETTERBERG H. Zetterberg 00:17:12 - 2373 12 - FRANZEN - 00:17:12 - 2494 66 - NASLUND - 00:17:12 -7 2575 50 2568 40 3 KRONVALL N. Kronwall 00:16:08 -5 2637 11 2632 38 -6 SAMUELSSON N. Lidstrom 00:15:41 - 2640 56 - LIDSTROM - 00:15:41 -3 2662 43 2659 31 -28 WILLIAMS D. Cleary 00:15:18 -6 2688 42 2682 26 18 SAMUELSSON M. Samuelsson 00:10:59 -27 2968 11 2941 -2 7 WILLIAMS J. Williams 00:05:40 - 3070 52 - MALTBY - 00:05:40 -17 3277 46 3260 43 0 LIDSTROM N. Lidstrom - - - 3310 34 15 - M. Samuelsson 00:02:40 -14 3454 68 3440 53 -15 SALO S. Salo 00:01:17 -22 3545 62 3523 39 23 MARKOV D. Markov

If anyone is wonder how you go about getting these shots to agree, this is how. I should note FT: represents the ft recorded in the NHL play-by-play. T1 is seconds since start of game from NHL official sheets, and T2 is seconds since start of game from CBS SportTicker. Diff is the difference between T1 and T2, X,Y is the cordinates of the shot supplied by CBS (I changed X a little though).

I recently discovered that the official sheets are not even close to 100% accurate with their shot information. For example, Green has a shot recorded 2 seconds after Linden's goal (early second perid), but Linden's goal came off a rebound from Green's shot (2 seconds before). The CBS SportsTicker didn't record Green's shot and the NHL recorded it wrong. Also watching the games it appears that the NHL records extra "marginal" shots that may have appeared to be going wide that the NHL later determined were "on net", how they figure this out I'm not sure. I haven't figured out which figure the NHL play-by-play shot distance or CBS X,Y cords are more accurate yet.

I'm not to sure how the SportTicker stuff is physically done, but it appears shots occur on average well before they physically occur. A good example is J. Williams shot at 2941 (CBS time), that the NHL recorded as 2968 (27 seconds later), that's one great prediction. So I'm curious exactly how they determine the times for the SportsTicker. CBS converts the SportsTicker data (GAME_TIME (Time in Period [As opposed to time remaining on clock])) to time remaining so they could have a mistake in their algoritm (or mine could be wrong). The times recorded of shots appear to be the release time as opposed to the stoppage in play time (when they hit the goaltender).

If anyone has ideas how to make things work better quickly that'd be great.