Beta Test / Technical

[sinbad7]

Very strange,yes I see the map is skewed somehow. I am positive I put correct geo refs. near the four corners of the map as well as the real corners.
I wonder if the original bitmap images did not point true North?

Thanks
Tore

[sinbad7]

Recalibrated the chart and converte anew. Still shows the same skew?
Checked the calibration points very carefully and they are all correct.

Suggestions anybody?

Tore

[BluegillBoy]

I have problems with correctly calibrated charts if don't enter a SK= (degrees plus or minus) in the kap header. they work fine, but not with quilting turned on.

the utilities i've used to rip and calibrate the charts don't automatically enter a skew, and OCPN needs a skew in order to quilt non-north-up charts i believe.

i've converted most of the Illinois Waterway charts, but they're DEFINITELY not north-up. since it's a river, they're published left to right to maximize the most river the USACE can get on a piece of paper (or in a JPG).

i'm starting to put a protractor on each of them so I can measure skew and put that into the header. but what a pain.

on the river, it works fine to turn off quilting. they're all the same scale, and one chart goes away and another comes up. fine for my needs.

take a look and see... your problem might be related to SK= ?

[sinbad7]

I even tried correcting the same amount of skew as shown in the original .png file before re-calibrating and converting to a new .kap but the same error comes back. The original bitmap chart IS displayed N up and consists of 6 screen tiles merged together.

How do you know what skew value to enter in SK= ? Like this: SK=-6.5 ?

What causes the strange AIS target and route behaviour when the chart is moved? Does not happen in Fugawi ENC or SeaClear.

Tore

[BluegillBoy]

I've got no idea why OCPN treats these differently than other programs. That one's waaay over my head.

on the skew, yup, it's like SK=-6.5 and I get the degrees of ration/skew by measuring at the compas rose.

but if the original is N up, then it shouldn't be a problem.

do you get the same bad behavior wit hquilting off? my skew problem only acts up when quilting is on, so that might be a clue as well.

[sinbad7]

BluegillBoy..

I did not use quilting..and yes the bitmap charts were N up as far as I could see.

I just did the same tiling from the other (Yellow Pages) Norwegian source and the calibration and skew frame was perfect. Very odd.

Download it here for testing: http://www.4shared.com/file/z5kb6UyN...pproach-B.html

Tore

[Sailing Hanse37]

Hi,

if you try to minimize Open-CPN window size with your mouse it simply crashes completely. Easy to reproduce, but maybe not that very important...

[nohal]

Originally Posted by Sailing Hanse37

Easy to reproduce, but maybe not that very important...

Impossible to reproduce here (and I suppose not just here)... Any more info you can provide? Anything in the log? Unlikely but easy to check.

Pavel

[Viking Sailor]

Not reproducible on my XP running 2.3.1

[BluegillBoy]

Originally Posted by Sailing Hanse37

Hi,

if you try to minimize Open-CPN window size with your mouse it simply crashes completely. Easy to reproduce, but maybe not that very important...

I can't reproduce that and have never had that happen. which version and OS are you on, and by "minimize" do you mean clicking the upper right corner button, or dragging the lower right to a smaller size, or clicking on the toolbar icon to minimize it to the toolbar?

[nohal]

Source builders,
I finally got some time to have a look at the regressions in navobject management and GPX handling discovered since the 2.3 release.
The patch with some brief list of problems that it should fix is posted in flyspray as FS#349 : GPX and navobject management regressions
If you have some time, please try to test it a little bit as all I have here are very artificial data. Builds and runs on Windows, didn't have time and CPU cycles to build on Linux yet.

Thanks

Pavel

[prroots]

I just purchased a Garmin gps 72H handheld unit yesterday ($118.95) and it interfaces to OpenCPN V2.3.1 fine using the Garmin interface option. I've also been able to upload both routes and waypoint to gps from OpenCPN. I'm running Windows 7. The reason I purchased this gps was due to these key specs:
- takes 2-AA batteries
- waterproof
- floats
- WAAS capable
- USB interface (also serial)
- price

I wanted some way to obtain my position in case house batteries fail during a passage. At that point we switch to 72H and paper charts ie, it's easy to keep a bunch of spare AA's. This is an amazing product (as is OpenCPN) and wondered if it should be added to the list of supported gps devices?
Pete

[Sailing Hanse37]

Originally Posted by BluegillBoy

I can't reproduce that and have never had that happen. which version and OS are you on, and by "minimize" do you mean clicking the upper right corner button, or dragging the lower right to a smaller size, or clicking on the toolbar icon to minimize it to the toolbar?

I'm on XP service pack 3, and the error occurs when dragging the upper left corner to min. window dimensions. I took a screen copy, see below

[Viking Sailor]

Works fine for me using XP SP3 running 2.3.1

[sinbad7]

BlueGillBoy..

Just found out that ALL the nautical maps on the Norwegian Coastguard site are skewed 5.6 degr to the right. Any captures must be skewed 5.6 degr. left before calibration/conversion.

Tore