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Multiple monitor cache scaling issue

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10-21-2010 08:21 AM
RyanClark
by
Deactivated User
‎10-21-2010 08:21 AM
We're trying to do a presentation in Explorer across three 30" monitors. Unfortunately, the image quality when stretched across the monitors is terrible in 3D mode.

When viewed on a single monitor, the imagery, or content, or whatever is being displayed, looks fine. However, when the image is stretched across three monitors, the image quality is degraded. It appears that when stretched, the width of the image that we saw on one monitor is stretched across all three. This means that we have essentially zoomed in closer to the earth's surface when we go to three monitors. However, instead of showing a tile cache appropriate for the new zoom level, we still see the same cache level that was appropriate on one single monitor.

In 2D it works flawlessly -- when stretched across three monitors, instead of fitting the same width as a single monitor, I see more of the Earth's surface, and since the zoom level doesn't change, the image remains crisp.

I'm sure that there have been many successful multi-monitor presentations done with Explorer, and that makes me think that I'm missing some kind a option somewhere. I'm sure it is some kind of software issue, because Google Earth and 2D Explorer work just fine.
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2 Replies
MLowry
by
Frequent Contributor
‎11-03-2010 06:37 AM
What is your detailed hardware configuration with all model #'s and types of connections?
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RyanClark
by
Deactivated User
‎11-03-2010 07:53 AM
The setup is an ATI FirePro V4800 graphics card pushing three HP LP3065 30-inch Widescreen LCD Monitors. One is connected via DVI-D and two by DisplayPort. However, I can see the same effect on other smaller, dual screen setups. It is clear on just two 1600x1200 monitors that when the explorer window is dragged across both monitors, the image quality is degraded.

I noticed that as you change the size of the Explorer window, the view's altitude remains constant, although the size of the image increases. I'm going to guess that Explorer decides which level of tile cache to render based on the altitude of the view. What that amounts to is a larger rendering of the same tile cache when you've expanded the view.

I've talked to ESRI support about this and they tell me they've logged a bug/enhacement request. It was interesting to notice that the behavior is not the same in ArcGlobe.

NIM062366 - When displaying ArcGIS Explorer over multiple screens, 3D mode stretches the map and degrades the resolution of the map.

Thanks,
Ryan
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