Re: [OpenMap Users] CADRG tiles disappear

From: Don Dietrick <dfdietrick_at_gmail.com>
Date: Fri, 24 Aug 2012 22:52:21 -0400

Thanks for sending this report, I'll try to reproduce it.

-- Don

On Aug 23, 2012, at 1:04 AM, "Straub, Daniel" <Daniel.Straub_at_cassidian.com> wrote:

> Hi,
>
> I am having the same issue using the RPF layer. Sometimes more than half
> the screensize of the map is not displayed. For me it's always a
> horizontal line between displayed and non-displayed tiles. Just to
> confirm this problem. May be i'm doing wrong the same thing Thomas
> does...
>
> A while ago I have also found some similar issues for displaying GeoTIFF
> data, which i want to mention:
> Using the ImageTileLayer, nothing will be displayed on startup. Now
> switching to the layer's options by using the LayersPanel, selecting the
> file and click the "Go To" button reveals the GeoTIFF data. The data is
> displayed as long as the center of the projection is not changed, e.g.
> by moving the map. Zooming does work without any problem.
>
> Daniel Straub
>
> -----Original Message-----
> From: Don Dietrick
> Sent: Thursday, August 23, 2012 3:04 AM
> To: DeGregorio, Thomas (US SSA)
> Cc: openmap-users_at_bbn.com
> Subject: Re: [OpenMap Users] CADRG tiles disappear
>
> Hi Thomas,
>
> Can you send me some screen shots?
>
> Thanks,
> - Don
>
> On Aug 22, 2012, at 3:41 PM, DeGregorio, Thomas (US SSA) wrote:
>
>> Hello,
>>
>> I am currently displaying CADRG maps in a JAVA
> application. I have the program configured such that the user can zoom
> with the mouse wheel. The ZoomEvent is set to "relative" with a zoom
> step size of 1 / 1.1f. The projection type of our MapBean is LLXY. I am
> also using the Overlay Map Panel to control panning and zooming.
>>
>> When we zoom in, we increase the scale. The map enlarges and
> eventually changes the CADRG zoom level as it should. However, if we
> have a group of tiles all at the same zoom level, when we zoom in some
> of the tiles disappear. The tiles reappear when we zoom in one step
> more. We also have noticed that the tiles can also disappear depending
> on how the map is positioned on the screen.
>> For example if we have 3 tiles, two of them at the same longitude
> touching and one below touching. If we zoom in the lower tile
> disappears. If I pan up, the lower tile reappears, but sometimes one of
> the upper tiles disappears also.
>> I'm a bit curious if this is a known issue or if it's a mistake on my
> part. I can't seem to solve this issue. I am currently am using a
> RpfLayer to display our CADRG maps.
>>
>> Thanks
>> Thomas DeGregorio
>>
>
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Received on Fri Aug 24 2012 - 22:54:19 EDT

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