Hello, I am evaluating Nevron Diagram for use in one of our products. I am looking for a diagramming solution that supports maps, and need to know if objects placed on a layer can be tied to a geographic coordinate vs. just screen coords. For example, does your tool allow me to place an image (say an aircraft) on a layer and know that it is at a specific lat and long?

Hello Robert,

 

Yes, this is possible to achieve with Nevron Diagram, however this is not a built-in functionality in the current version and can be done with some custom coding.

 

We will introduce this functionality in the upcoming service pack. We will provide support for almost all map projections. The service pack is expected in couple of days.

 

Please do not hesitate to contact us if you have any questions or comments.

 

Best regards,

Nevron Support Team

Best Regards,
Nevron Support Team

Any update on the service pack that includes Geo-coordinate support? Thanks.

Hi Robert,

 

The service pack has been just released and you can now download it from the public downloads section.

 

Please, let us know how your evaluation is going. Also, send us your feedback regarding the service pack, it will be highly appreciated.

 

Best regards,

Nevron Support Team

Best Regards,
Nevron Support Team

So far, the coordinate mapping seems to work fine. I've only been working with a world map so far, so I can't verify that it will work with shape files that are of smaller regions (e.g. countries, states, etc.) I'm assuming that for those cases, I just need to make sure the MapBounds are set to reflect the proper limits of the map region, correct?

Hi Robert,

 

The coordinate support will work not only for world map but also for separate countries or smaller regions.

 

Kind regards,

Nevron Support Team

Best Regards,
Nevron Support Team

First, thanks for all of the support - you guys are fantastic!! (I did purchase Diagram based on your support.)

Anyway, here's my question/problem:

In my view that has a map loaded, I am seeing very sluggish performance whenever the map I've loaded is visible in the view. For example, using the document MouseMove event to determine the Geo coordinates is very fast as long as the view is not fully showing the map. However, as soon as the map is in the visible region, the calls to display coordinates have a significant lag.

I've not seen that problem in the Projections example, but for the life of me, I can't see what I've done differently in my code (other than using a few more layers in the drawing.) This lag is also apparent when a poly line shape is added/edited in the view - it can take a half a second to redraw a segment that has been moved by the user.

Any ideas on why I'd be seeing such a degradation in drawing performance? Thanks!

Hi Robert,

The performance degradation may be caused by using too many local styles instead of style sheets, not refreshing the view only when necessary or some other reason. I will be able to assist you better if you send me your sample project.

Best Regards,
Pavel Vladov

I've been able to reproduce this in the MapProjections example code so it doesn't appear to be an issue w/ my logic.

Try these steps:

1. Set the projection mode to Equirectangular
2. Zoom out to 15-18% (probably doesn't matter, but makes it more apparent.
3. Scroll the map so the northern/western hemisphere is visible - e.g. scroll to show Alaska
4. Move the mouse over the map and notice how sluggish the geo position update is in the example panel.
5. Scroll to somehere in the middle of the map - around Africa - performance is easily 10x better!

Hi Robert,
The slowdown is caused by the fact that the map selected for the map examples is very detailed (some countries are composed of more than 50 000 points) and the hit testing of such enormous shapes take some time. If you want to speed up the process I recommend you to use less detailed maps.

Best Regards,
Pavel Vladov