Re: [OpenMap Users] Questions Questions and more Questions!

On Nov 20, 2003, at 2:27 AM, Gatrell, Mark (UK) wrote:

>
> Don
>
> I was thinking of vmap level 1 and 2 data in question 1... I suppose
> I could split the directory information up so that a different
> location
> contained the vector data for say A roads then reference the new
> location in an A road layer. This would take a lot of work and a good
> understanding of vmap architecture..umm

It would take some work, but you really don't want to split the
directories up. The directory structure and supporting files are all
kind of tied together. The VPF code uses feature codes to figure out
what features to draw. These features can be further classified by
FACC codes, which categorize the features into much more specific
groups. Unfortunately, OpenMap doesn't filter and/or color features by
FACC codes. That would be the improvement to pursue.

> As for 2 .. When I complete this I will send you a copy!

Excellent!

>
> Now 3 Umm may be later!

OK.

- Don

>
>
>
> -----Original Message-----
> From: Don Dietrick [mailto:dietrick@bbn.com]
> Sent: 19 November 2003 19:07
> To: Gatrell, Mark (UK)
> Cc: Openmap-Users (E-mail)
> Subject: Re: [OpenMap Users] Questions Questions and more Questions!
>
>
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>
> Hi Mark,
>
> On Nov 11, 2003, at 6:41 AM, Gatrell, Mark (UK) wrote:
>
>>
>> Hi OpenMap users
>>
>> I have a few questions ... Any help is appreciated.
>>
>> 1. Is it possible to change the individual properties of the map
>> features, IE Change the thickness/color of major roads only?
>
> This depends on the layer. The general architecture of OpenMap
> supports this. What kind of data are you thinking about.
>
>> 2. Is there a way to display UK maps using BNG coordinates?
>
> OpenMap can only display decimal degree lat/lon data or pixel
> coordinates. You'd have to convert the BNG coordinates first.
>
>> 3. Is it possible to change the viewpoint of the map IE look at the
>> map as if we were facing south?
>
> Not out-of-the-box. You'd have to modify the MapBean to rotate the
> java.awt.Graphics object it passes to its Layer children. You might
> have to play with the projection before it got fired to the layers,
> too, to make sure it covered the right area of the rotated projection.
> If you want smooth translation of the mouse events, you'd have to
> rotate those, too.
>
> I guess #3 would take some work.
>
> - Don
>
>
>
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