Re: [OpenMap Users] VPFLayer problems with DNC (DNC17)

Hi Tim,

Thanks for the pointer to the data. Here's what I get using the
VPFConfig class to configure the layer running in OpenMap 4.6 beta.
Looks OK to me. I get the same result in 4.5.4 with those properties:

######## START Properties ########
vpf_layer.prettyName=Hydro
vpf_layer.class=com.bbn.openmap.layer.vpf.VPFLayer
vpf_layer.searchByFeature=true
vpf_layer.vpfPath=/Users/dietrick/Desktop/dnc17
vpf_layer.coverageType=hyd
vpf_layer.featureTypes=edge area
vpf_layer.edge=hydline
vpf_layer.area=hydarea
vpf_layer.hydarea.fillColor=999999
vpf_layer.hydline.lineColor=ff003399
######## END Properties ########

Regards,

Don

On Saturday, October 11, 2003, at 12:01 PM, Nolan Timothy P Jr NPRI
wrote:

> Hi Don,
>
> I don't have the code on hand right now, but I can assure you that the
> hydrography lines are being drawn on a different layer from the
> hydrography areas. The lines are given a line color; the areas are
> given fill colors. In any case, I can comment out the creation of the
> lines layer, and only create the area layer, and the problem still
> persists.
>
> I was able to Google this link:
> http://164.214.2.59/cda/article/0,2311,3104_12135_1830569,00.html
> which provides the most recent version of the DNC that I'm using. I'm
> using the library "gen17a" which is located here:
> http://164.214.2.59/dncpublic/data17/vpf17/gen17a.zip
> I assume that you can use that single library and recreate my problem.
>
> Thanks a lot,
> -Tim Nolan
>
>
>
> -----Original Message-----
> From: Don Dietrick
> To: Nolan Timothy P Jr NPRI
> Cc: 'openmap-users@bbn.com'
> Sent: 10/10/2003 6:20 PM
> Subject: Re: [OpenMap Users] VPFLayer problems with DNC (DNC17)
>
> Hi Tim,
>
> The screenshots really help. My guess is that there is a fill color
> set for the hydrography lines, and some polylines are being filled to
> make up the blotchy areas. What do your properties for the layer look
> like?
>
> - Don
>
>
> On Friday, October 10, 2003, at 06:08 PM, Nolan Timothy P Jr NPRI
> wrote:
>
>> Hi Don, nice to hear from you.
>>
>> As far as actually producing map graphics, the VPFLayer behaves
>> perfectly: zooming, panning, redrawing, et al., all perform normally.
>>
>> It is the information that is actually extracted from the DNC that
>> seems erroneous. I've attached two cropped screenshots. The file
>> "vpfview.gif" is taken from NIMA's VPFView program, and shows the
>> hydrography area in light blue, and the hydrography lines in darker
>> blue. The file "openmap.gif" is taken from my application using
>> OpenMap, although I've taken out all of my extraneous layers so that
>> all that can be seen is the DNC hydrography area in black, and the
>> hyrdrography lines in gray. These shots are both taken of the area
>> south and east of Long Island. You'll notice that VPFView outlines
>> Long Island, and the islands of Martha's Vineyard and Nantucket. The
>> shot from OpenMap doesn't show much of Long Island, and definitely
>> draws water areas over where Martha's Vineyard and Nantucket should
>> be. Also, there is a huge swath of area where no data is drawn. It
>> follows the contours of the hydrography lines in some areas, and
>> follows lines of latitude and longitude in others. Perhaps this
>> suggests that certain specific times contain malformed VPF data that
>> VPFView is tweaked to handle, whereas OpenMap is not? I did download a
>
>> newer version of DNC17 (specifically, the gen17a library) and that did
>
>> not help. I can probably hunt around for a public link to this data if
>
>> it might help.
>>
>> Thanks,
>> -Tim Nolan
>>
>>
>>
>> -----Original Message-----
>> From: Don Dietrick [mailto:dietrick@bbn.com]
>> Sent: Friday, October 10, 2003 4:07 PM
>> To: Nolan Timothy P Jr NPRI
>> Cc: 'openmap-users@bbn.com'
>> Subject: Re: [OpenMap Users] VPFLayer problems with DNC (DNC17)
>>
>>
>> Hi Tim,
>>
>> On Friday, October 10, 2003, at 03:58 PM, Nolan Timothy P Jr NPRI
>> wrote:
>>
>>> Hello,
>>>  
>>> I am using OpenMap to view NIMA's Digital Nautical Chart (DNC),
>>> specifically DNC 17 (covering most of the eastern US seaboard).
>>> I am adding VPFLayers programmatically to my LayerHandler, and all
> the
>>> Harbor and Approach libraries display correctly.
>>> However, I would like to use data from the Coastal and General
>>> libraries, but their coverages are drawn improperly.
>>> Specifically, south and east of Long Island, hydrography area data is
>>> drawn where it does not exist, and not drawn where it does.
>>> Interestingly, the data areas are bordered by hydrography lines, so
>>> perhaps this has something to do with the problem.
>>
>> So besides being drawn in the wrong place, does it react property to
>> projection changes, moving with the map and displaying consistently?
>> How do you know they are in the wrong place (what data are you
>> comparing the location to)?
>>
>> We don't have much DNC data, so it's hard to get a bead on what is
>> happening. Got a screenshot?
>>
>> - Don
>>
>>>  
>>> This problem affects both the current release version (4.5.4) and the
>>> October 4th snapshot of the 4.6 beta.
>>>  
>>> Any information would be greatly appreciated.
>>>  
>>> Thank you very much,
>>> -Tim Nolan
>>>  
>>>  
>>>  
>>>  
>>> ____________________________________________
>>> Timothy P. Nolan
>>>  
>>> Naval Undersea Warfare Center
>>> Code 2233
>>> 1176 Howell St.
>>> Newport, RI 02840
>>>  
>>> (401) 832-5284
>>> nolant@npt.nuwc.navy.mil
>>>  
>>>
>>
>>
>> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>> Don Dietrick, BBN Technologies, dietrick@bbn.com
>> 10 Moulton Street, Cambridge, MA 02138
>> 617-873-3031 [fax]-2794
>> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>>
>> <openmap.GIF><vpfview.GIF>
>
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Don Dietrick, BBN Technologies, dietrick@bbn.com
> 10 Moulton Street, Cambridge, MA 02138
> 617-873-3031 [fax]-2794
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> --
> [To unsubscribe to this list send an email to "majdart@bbn.com"
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>
>

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Don Dietrick, BBN Technologies, dietrick@bbn.com
10 Moulton Street, Cambridge, MA 02138
617-873-3031 [fax]-2794
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

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