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Forum: OpenCPN

18-03-2016, 02:16

Replies: 1,918

Sticky: OpenCPN General

Views: 584,065

Posted By Markus451

Re: OpenCPN General

Thanks for your reply, Dave. I believe that you are mistaken when you say the NAD27 grid is just ink on paper even after being corrected but I really appreciate your effort to share your experience....

Forum: OpenCPN

14-03-2016, 20:06

Replies: 1,918

Sticky: OpenCPN General

Views: 584,065

Posted By Markus451

OpenCPN Chart Datum Correction, kap line "DTM= 0.00, 0.00"

Good to know it's an option but my charts list the specific northing and easting required to instantly make the chart NAD83 compliant, so that's why I'm trying to fix the correction entry in the...

Forum: OpenCPN

11-03-2016, 20:16

Replies: 1,918

Sticky: OpenCPN General

Views: 584,065

Posted By Markus451

Chart Datum Basics in case anyone is interested

Natural Resources Canada has a webpage that converts NAD27 to NAD83:

NTv2 (https://webapp.geod.nrcan.gc.ca/geod/tools-outils/ntv2.php?locale=en)

Here is a clear explanation of what it's all...

Forum: OpenCPN

11-03-2016, 20:10

Replies: 1,918

Sticky: OpenCPN General

Views: 584,065

Posted By Markus451

Re: OpenCPN General

Great idea about hex editor, I'll try that! The charts are from the late 90's and the rocks haven't gone anywhere, whereas sand bars shift every year, so I don't see the need to get new charts. ...

Forum: OpenCPN

11-03-2016, 19:32

Replies: 1,918

Sticky: OpenCPN General

Views: 584,065

Posted By Markus451

Re: OpenCPN General

OK, good to know. But I still prefer to gain the knowledge and fix my existing charts. It's the same as learning how to fix an engine. If you just pay to make a problem go away, you haven't...

Forum: OpenCPN

10-03-2016, 20:12

Replies: 1,918

Sticky: OpenCPN General

Views: 584,065

Posted By Markus451

Re: OpenCPN General

Now we're getting somewhere! Great idea, thanks. The logfile showed exactly what went wrong:

C:\MARINE\CHARTS\BSB_ROOT\BSB_CANADA_WEST\347302.KAP
5:43:02 PM: Chart datum {NAD27} invalid on...

Forum: OpenCPN

10-03-2016, 19:38

Replies: 1,918

Sticky: OpenCPN General

Views: 584,065

Posted By Markus451

Re: OpenCPN Chart Datum Error

OpenCPN does indeed have the capability to work with different datums. The documentation says so and it says the corrections are automatically applied. However, the info in the KAP file must be...

Forum: OpenCPN

10-03-2016, 19:03

Replies: 1,918

Sticky: OpenCPN General

Views: 584,065

Posted By Markus451

Re: OpenCPN General

I've got all the RNC charts for BC and more than half are NAD27. The CHS charts now sold have the proper datum corrections, thus the datum listed in the chart legend isn't relevant, but mine don't. ...

Forum: OpenCPN

10-03-2016, 18:56

Replies: 1,918

Sticky: OpenCPN General

Views: 584,065

Posted By Markus451

Re: Tool for georeferencing scanned charts?

IN CASE ANYONE STILL WANTS TO CONVERT PAPER CHARTS.. The current version of OpenCPN's helpfile has all that info, or more specifically it has the links to the OpenCPN website with all the info you...

Forum: OpenCPN

09-03-2016, 21:04

Replies: 1,918

Sticky: OpenCPN General

Views: 584,065

Posted By Markus451

Re: OpenCPN General

AFTER WORKING FOR HOURS, THIS IS THE UPDATED VERSION OF POST:

My issue is that many of my RNC charts of BC waters use the old NAD27 chart datum, instead of NAD84 used by modern GPS's. OpenCPN...

Forum: OpenCPN

09-03-2016, 18:33

Replies: 1,918

Sticky: OpenCPN General

Views: 584,065

Posted By Markus451

OpenCPN Chart Datum Error

This is my first post on the forums; I hope I have placed it properly.

My issue is that many of my RNC charts of BC waters use the old NAD27 chart datum, instead of NAD84 used by modern GPS's. ...

Showing results 1 to 11 of 11

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