Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 05-01-2016, 06:49   #1
bcn
Registered User

Join Date: May 2011
Location: underway whenever possible
Boat: Rangeboat 39
Posts: 2,769
Quilting of different chart types

I'm posting this in a different thread as it seems not 4.1.1301 related.

Several charts - Raster (.kap) and Vector (S-63/S-57 and CM93)

The raster chart will quilt with CM93 but not with S-63.

Hiding the CM93 results in falling back to the background chart, the S-63 will not drop in. Having competing CM93 and S-63 for the same region, the CM will show up, even when the S-63 has a better scale (1:45.000, while CM is at 1:50.000) - always talking about quilting withe .kap.

In the case of zooming out sufficiently and selecting via the piano both types of vector charts can be selected.

Screen shots below - just observe the piano bars to follow the logic.
Attached Thumbnails
Click image for larger version

Name:	2016-01-05 12_50_12-OpenCPN 4.1.1301-kap-cm93.jpg
Views:	71
Size:	229.8 KB
ID:	116194   Click image for larger version

Name:	2016-01-05 12_51_22-OpenCPN 4.1.1301-S633-detail.png
Views:	66
Size:	24.1 KB
ID:	116195  

Click image for larger version

Name:	2016-01-05 12_51_22-OpenCPN 4.1.1301-CM93-detail.png
Views:	67
Size:	29.9 KB
ID:	116196   Click image for larger version

Name:	2016-01-05 12_51_22-OpenCPN 4.1.1301-CM93-hidden.jpg
Views:	68
Size:	220.1 KB
ID:	116197  

Click image for larger version

Name:	2016-01-05 12_51_22-OpenCPN 4.1.1301-CM93-hidden-S63-selected.jpg
Views:	73
Size:	242.5 KB
ID:	116198   Click image for larger version

Name:	2016-01-05 12_51_22-OpenCPN 4.1.1301-CM93-visible-S63-selected.jpg
Views:	67
Size:	234.4 KB
ID:	116199  

__________________

__________________
bcn is online now   Reply With Quote
Old 05-01-2016, 08:36   #2
Registered User

Join Date: Jan 2007
Location: Minneapolis
Boat: Irwin 37 CC
Posts: 660
Re: Quilting of different chart types

I didn't realize that this (S57 and raster) was supposed to work. CM93 has always seemed a little reluctant to jump into the quilt. I just updated the wiki and didn't include the above.
__________________

__________________
David Kester
Pegasus IV
wdkester is offline   Reply With Quote
Old 05-01-2016, 11:27   #3
Marine Service Provider
 
bdbcat's Avatar

Join Date: Mar 2008
Posts: 4,884
Re: Quilting of different chart types

Hubert...

OCPN does not quilt raster charts (KAPs) with vector charts other than cm93. And it never has.

Why and/or how can we quilt with cm93 so readily? Because we know that cm93 is continuous worldwide (except high latitude). So we simply add in cm93 wherever there is nothing else to show except the lo-res backing chart.

Should O quilt rasters and vectors together? Well, maybe....

One can always find specific geolocations and chart cell availability to wish that O would "do the right thing" in this instance. The right thing being what you want it to do, logically.

But actual live coding logic for the cases of arbitrary chart availability, display scale, and location is not trivial in practice. I suppose one could develop some display policies, or profiles, from which a user might select.
a. No mixed quilt
b. Mixed quilt, giving preference to raster for equal scales.
c. Mixed quilt, giving preference to vectors for equal scales.
d. Mixed quilt, unless available cm93 cell is larger scale than vector/raster target.
e. Mixed quilt, giving preference to most recently updated chart of whatever family.
f. etc, etc.

Quilting needs to play nice with the ChartBar as well. The original idea of the ChartBar, individual chart disable options, and scale in/out buttons was this:
Faced with a navigation task, and looking at a chart drawer full of "virtual" charts, the navigator is in a better position to decide what chart to reach for than digital logic ever could be. So we have these controls to override the predictable internal logic of OCPN.

I hope this discussion makes sense. Clearly there will be no major change in O's quilting logic for O4.2.
But I would like to continue exploring ideas here in planning for (dare I say it?) OCPN V5, coming in 2016.

Thanks
Dave
__________________
bdbcat is offline   Reply With Quote
Old 07-01-2016, 06:07   #4
Registered User
 
rgleason's Avatar

Join Date: Mar 2012
Location: Boston, MA
Boat: 1981 Bristol 32 Sloop
Posts: 9,421
Re: Quilting of different chart types

I continue to be marvel at the skills and complexity involved to pull this program together! I have no doubt that the svg problem will be solved.
__________________
rgleason is online now   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Anchor types & Bottom types pbiJim Anchoring & Mooring 31 03-06-2014 21:38
ENC Chart Quilting (3.1 beta and earlier) nkiesel OpenCPN 10 23-02-2013 18:35
different core types (foam pvc, divinicell vs balsa) schoonerdog Multihull Sailboats 56 22-07-2008 10:56
Vinyl Headliner - Different Types? JeffHale Construction, Maintenance & Refit 5 25-07-2007 14:58



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 06:52.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.