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Old 20-11-2011, 12:33   #1111
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Re: Charts II: NGA - 2700 Charts

....and there's still room for discussion?
81563 I redid as a case in point...see?is it necessary to include blank space when the only extra info is the scale on the chart?Or where a quilt line can be placed "close enough" to read the extra info deemed useful at a readable zoom but still chop out garbage and blank?
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Old 21-11-2011, 04:14   #1112
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Re: Charts II: NGA - 2700 Charts

Hi
I am new and wanted to ask a question. What are you doing for charts like 21125. It is two rectangles of about equal size. Are you making two out of it. Say 21125A and 21125B or do you have a way to calabrate it as one.
Bob
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Old 21-11-2011, 04:27   #1113
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Re: Charts II: NGA - 2700 Charts

Bob,
cases like this are technically the same thing as small insets in a big charts - they have to calibrated separately and more KAP files have to be created - I'm currently coding the tools to do that.

Pavel
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Old 21-11-2011, 06:01   #1114
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Re: Charts II: NGA - 2700 Charts

Ok
But will the end result be two files or one. I am thinking I could start on these and submit them when you are ready. Do not want to waste time. If your code will do this I do not need to. I can break them down into parts then calabrate if needed.
Bob
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Old 21-11-2011, 06:07   #1115
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Re: Charts II: NGA - 2700 Charts

Bob...
we are trying not to do any part of the calibration locally - that would be a total nightmare to coordinate and manage. Just wait for a while when the website extension is ready.

Pavel
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Old 21-11-2011, 06:37   #1116
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Re: Charts II: NGA - 2700 Charts

OK
Bob
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Old 21-11-2011, 08:05   #1117
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Re: Charts II: NGA - 2700 Charts

And Bob,

thanks for stepping in - we appreciate every helping hand!

So stay tuned!

Hubert
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Old 03-12-2011, 15:25   #1118
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Re: Charts II: NGA - 2700 Charts

I just went through the 20000 series again to look for charts that would benefit from some PLYing.
I have updated the plys for 2450, 25526, 26070, 26145, 26306, 26307, 26344, and 28042. They will have 12/03 dates.

I'm having problems with 26280 and 26284. When I try to update the PLY polygon, it seems to hang with the message "crunching chart 26084" or something like that.
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Old 18-12-2011, 10:12   #1119
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Re: Charts II: NGA - 2700 Charts

Here is some good reading, very relevant to our project.
The latest about chart accuracy, datums etc. It's from a BA point of view, but still applies to a large extent.
Excerpts from "The Mariners Handbook" published 2009.

Thomas
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Old 18-12-2011, 14:42   #1120
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Re: Charts II: NGA - 2700 Charts

It seems read permission is not granted for some of the original jpg files such as ftp://ftp.weizterfish.com/21478/21478.jpg
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Old 18-12-2011, 17:11   #1121
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Re: Charts II: NGA - 2700 Charts

Quote:
Originally Posted by z.stadler View Post
It seems read permission is not granted for some of the original jpg files such as ftp://ftp.weizterfish.com/21478/21478.jpg
so it is!Well,might be shut for a good reason....?
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Old 18-12-2011, 22:40   #1122
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Re: Charts II: NGA - 2700 Charts

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Originally Posted by HappySeagull View Post
so it is!Well,might be shut for a good reason....?
I don't think so.
  1. There are links from opencpn.info to these files, such as NGA Charts Status Region 2 at OpenCPN.info (English)
  2. Many other maps are available
  3. Why would the results of a community effort not be available to the community?
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Old 19-12-2011, 00:54   #1123
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Re: Charts II: NGA - 2700 Charts

Zeev & Happy...
No reason at all, the files uploaded to the server by other means than ftp belonged to a different user and didn't have the right permissions set to be readable through anonymous ftp. Should be corrected now.

Pavel
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Old 19-12-2011, 11:25   #1124
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Re: Charts II: NGA - 2700 Charts

Quote:
Originally Posted by cagney View Post
Here is some good reading, very relevant to our project.
The latest about chart accuracy, datums etc. It's from a BA point of view, but still applies to a large extent.
Excerpts from "The Mariners Handbook" published 2009.

Thomas
...yikes! A Highlight for me is:
" the largest difference found to date (2009) is 7 miles in the Pacific ocean but larger differences may exist"
(section 2.12 about undetermined datums)....

I fired up Nohals GE plugin to see if I can spot this!....Many of the NGAs don't agree perfectly but ,GE can't get the Greenwich meridian right (it's .249 min west) so maybe that's as far as I'd allow GE to correct my charts,too...unless I had a real report.
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Old 19-12-2011, 11:43   #1125
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Re: Charts II: NGA - 2700 Charts

Happy,
I'm confused by "GE can't get the Greenwich meridian right (it's .249 min west)" Couldyou say a little more?
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