QAM channel maps being broadcast

[loonsailor]

I'm having a hard time getting the channel maps right on my hdhr tuners. Since the switchover to cable, Comcast has been putting the proper maps in the program stream because their DTA's need it, so all the data necessary to keep the maps updated and correct is there. It can be read with the program scte65scan http://scte65scan.sourceforge.net/. Running it gives a bunch of interesting output:

./scte65scan -H 10146a1a,0 -p -V 3170 us-Cable-Standard-center-frequencies-QAM256 >mychannels.txt

mychannels.txt now has three sections, which I've excerpted here:

VCT_ID 3070 (0x0bfe) at 261012500hz, version 8
  VC CD.PROG M# NAME
====================
   2   86.1   4 KTVU
   3   87.1   4 KNTV
   4   86.2   4 KRON
   5   86.3   4 KPIX
   6   87.2   4 KICU
   7   86.4   4 KGO
   8   86.8   4 KTSF
   9   86.5   4 KQED
  10   87.4   4 KTEH
  11   80.9   4 HSN
  12   86.10  4 KBCW
  13   86.7   4 KOFY
  14   86.6   4 KDTV
  15   80.1   4 CSPAN
  16   87.5   4 KKPX
  17   81.4   4 KCSM
  18   87.3   4 KSTS
  19   86.9   4 KTNC
  20   81.5   4 KFSF
  21   81.3   4 KCNS
  22   81.1   4 KRCB
  24  119.1   4 EDUC-SF
  25   81.6   4 KTLN

CD    FREQUENCY
================
  1   75250000hz
  2   57000000hz
  3   63000000hz
  4   69000000hz
  5   79000000hz
  6   85000000hz
  7  177000000hz
  8  183000000hz
  9  189000000hz
 10  195000000hz
 11  201000000hz
 12  207000000hz
 13  213000000hz
 14  123000000hz
 15  129000000hz
 16  135000000hz
 17  141000000hz
 18  147000000hz
 19  153000000hz

PSIP channels
   VC     NAME  FREQUENCY   MODULATION PROG
===========================================
  6.3  KVIEVme  261012500hz QAM_256      4
  6.1   KVIEHD  261012500hz QAM_256      1
  6.2    KVIE2  261012500hz QAM_256      5
  5.1  KPIX-DT  531000000hz QAM_256      1
  2.1  KTVU-DT  531000000hz QAM_256      2
  2.2  KTVU-SD  531000000hz QAM_256      3
 22.1     KRCB  567000000hz QAM_256      1
 60.1     KCSM  567000000hz QAM_256      4
 38.1     KCNS  567000000hz QAM_256      3
 32.1     KMTP  567000000hz QAM_256      2
 68.1     KTLN  567000000hz QAM_256      6
 66.1     KFSF  567000000hz QAM_256      5
  9.4     V-ME  567000000hz QAM_256      9
  9.5     KIDS  567000000hz QAM_256     10
  9.3    WORLD  567000000hz QAM_256      8
 36.2  KICU SD  591000000hz QAM_256      3
 36.1  KICU HD  591000000hz QAM_256      1
209.1     KQED  597000000hz QAM_256      5
 26.1     KTSF  597000000hz QAM_256      8
204.1     KRON  597000000hz QAM_256      2
207.1      KGO  597000000hz QAM_256      4
 14.1     KDTV  597000000hz QAM_256      6
244.1     KBCW  597000000hz QAM_256     10
 42.1     KTNC  597000000hz QAM_256      9
205.1     KPIX  597000000hz QAM_256      3
202.1     KTVU  597000000hz QAM_256      1
220.1     KOFY  597000000hz QAM_256      7
 44.1  KBCW-DT  705000000hz QAM_256      5
  4.2  KRON HD  705000000hz QAM_256      1
  7.1   KGO-HD  753000000hz QAM_256      1
  9.1  KQED-HD  753000000hz QAM_256      2
  9.6  LIF/ENC  753000000hz QAM_256      3
  7.2  LIVWELL  753000000hz QAM_256      7
  7.3  KGOACCU  753000000hz QAM_256      8

It looks like everything is here to keep the hdhr QAM maps updated. However, there are a few questions:

• If I get a correct map out of this program, is there a way to get it into sage, other than manually?
• How do the 3-part channels (75-5-1), which sage shows me after after a scan correspond to the 2-part channels that I see in the result of scte65scan? For instance the scan tells me that KTVU, channel 2, is on 86.1. Sage thinks it's on 86-202-1. KVIE2, and HD channel, is on Sage as 30-6-2. This map show me that it's "sort of" on channel 30.5. I say "sort of" because the PSIP map shows that it's on "261012500hz program 5", and channel 30 is 261000000hz.
• Some of the station names are slightly different that Zap2it's. The map shows channel 104 is "Comcast Hometown", zap2it calls it LOOR104. Some of the channels on the map aren't in zap2it (173 63.7454 KTSF-KBS - and WTF is 63.7454 anyway?). I guess one could work from the numbers, or come up with a table of text correspondence, but some of the logical numbers are different too. KPIXDT is in the map as channel 5.1, on physical channel 75.1. Zap2it shows it on channel 705, and sage thinks its physical channel is 75-5-1. Oh, yes, I'm confused.
• Is there an easier way to keep the QAM maps updated automatically? Sage isn't doing well for me.

Has anybody played with this? It seems like something that Sage might want to take on, because if it can be made to work automatically the whole QAM channel mapping problem goes away and it becomes automatic.