Autor Thema: Satellite imagery problem  (Gelesen 661 mal)

Offline Volccc

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Satellite imagery problem
« am: 18 Oktober 2018, 19:54:00 »
I created satellite imagery map from historical map scans - Volga river before flooding. As it is 1:250 000, range is 8-512. But got strange effect - photo overlay visibility depends on shaded relief turned on or off. All works fine if shaded turned on. But if it off, I can see all tiles on scales > 5 km, and on  scales 5 km or less some tiles near map boundary become invisible.
What can I do to avoid this problem?

Offline gregory

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Re: Satellite imagery problem
« Antwort #1 am: 18 Oktober 2018, 20:37:06 »
The tiles on the extents become entirely invisible or partially invisible?

Offline Volccc

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Re: Satellite imagery problem
« Antwort #2 am: 19 Oktober 2018, 08:34:04 »
Seems entirely.

Offline gregory

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Re: Satellite imagery problem
« Antwort #3 am: 19 Oktober 2018, 16:33:04 »
Moving rest of conversation to private messages.

Offline gregory

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Re: Satellite imagery problem
« Antwort #4 am: 17 Januar 2019, 22:25:53 »
I never summarized the work around on this.

Issue was that when enabling a photo layer as full and disabling the shaded relief layer, the recognized extents for the photo layer come exclusively from the vector layer.

With a vector layer that was partially overlapping the photo layer, only the section where vector was created was rendered.

Work around for this issue:
* Create a vector layer (visible or not) to force extents
* Convert the photo layer into a shaded relief layer