The Weather Forecasting Forum

Weasel wrote:Jon,
Oddly enough the isopleths don't get chopped off at the corners on a map this size using mercator????
Pat

It's not just isopleths. Anything on the Analysis menu (or analysis scripts) that uses contours (CONT) does the same thing. It happens in various parts of the world, so I suspect that CONT needs a Mercator fix.

Hopefully Tim will be able to get a new version out that fixes this soon?

Chris,

The mercator projection is still fairly new in DA WS, so there will likely be a few bugs in it. To avoid the possible bugs, use orthographic.

Pat

PS Many of the links in this thread will no longer work.

I know Mercator has only been added recently, but unfortunately I need Mercator projection maps to work with MesoMap Live.

If there's a utility that will convert Orthographic GIF files into Mercator GIFs that would work, but I've not found one...or at least not in the free/cheap price range

Perhaps this is a question best asked on a forum that deals with mesomap...maybe ask them to add support for orthographic?

Pat

I removed several messages from this thread as the links I posted earlier are no longer valid. The title of the thread was also changed to eliminate confusion :)

Pat

Weasel wrote:Perhaps this is a question best asked on a forum that deals with mesomap...maybe ask them to add support for orthographic?

I already know what the answer is..."Not now, but maybe at some point in the future". I should know the answer...I'm one of the MesoMap Live developers

It's been tricky enough getting people to use/understand a single map projection without complicating matters by having multiple projections available. Being based on rectangles, Mercator is fairly easily understood by most people and as people need to provide edge coordinates for their maps, that's also fairly easy for them to work out. Providing equivalent coords for an orthographic map is likely to lead to more problems...how would users specify the map coords in a way that would allow further output to be accurately overlaid onto the map?

If there's a utility that will convert Orthographic GIF files into Mercator GIFs that would work, but I've not found one...or at least not in the free/cheap price range

Hello Chris

What is for you a cheap price range? Is such a program useful for others too?

I can advise you to have a look on the site of David Taylor: http://www.satsignal.net/. He has a lot of mapping tools. If you cannot find what you are looking for, you can always send him an email.

Greetings

Fred

Thanks for reminding me about David Taylor's site. I already use GeoSatSignal and his utilities are definitely in my price range.

Having reminded me about GSS, I went to look at it again. I've not used the feature before, but it does have a projection re-mapping. I'll have a better look at it in the next few days.

Of course I hope Tim manages to find the problem with the Mercator mapping in DAWS. It's better to do the work all in on place than to try to split it into two parts!