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Questions about making water mask
- Thread starter zhangzz
- Start date
Thank you. arno ，I seem to know where the problem is. I just tried it again and got the correct result
I have another question. The tiff I exported is very large. Can I reduce the tiff image and import it into the texture filter editor? Will there be errors when using the exported .TFC file?
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The idea is that you use small samples of your large image in the texture filter editor and then you can run the filter on the entire image from the script. So there should not be a need to load a large image in the editor. You can use a tool like QGIS to select some samples from your GeoTIFF file for the editor.
hi，I just tried to mask the water again, and the error still occurred. Can you help me figure out what went wrong? I think the attributes of the shp file are correct.
Here are my tiff and shp files, can you give it a try?
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The NDVI step is used to detect water in imagery with 4 bands, it needs a near Infrared band as well. Does your imagery have that?
Can you include your TFC file as well with the sample Images? Then I can try to reproduce the warning you get.
Can you include your TFC file as well with the sample Images? Then I can try to reproduce the warning you get.
Here are my tiff and shp files, can you give it a try?
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Hi,
The filter that gives the error is in the TFC file, so I would need that file as well to be able to reproduce the issue.
One problem I see directly is that your TIFF file is not geo-referenced. It needs to contain the WGS 84 coordinates of where the image is to be able to show the mask based on SHP data.
The filter that gives the error is in the TFC file, so I would need that file as well to be able to reproduce the issue.
One problem I see directly is that your TIFF file is not geo-referenced. It needs to contain the WGS 84 coordinates of where the image is to be able to show the mask based on SHP data.
HI ARNO, I sent you the file. I don't know why my shp file and tiff file both say there are no coordinates. I downloaded them from a paid software. How can I locate their coordinates?
Hai Arno, thank you for the reminder, it seems that the TIFF has no coordinates caused by the projection! After the coordinates are set, the projection will work as normal, and the water mask will be displayed normally, but it will still give an error。