topic Re: Problem with the pixel value in ArcGIS Survey123 Questions

Problem with the pixel value

DespinaTsigarida — Thu, 26 Nov 2020 13:21:57 GMT

Hello,

I have a dem in which two lines are shown, one is vertical and the other is horizontal. The pixel value of those is 0. When I use the slope tool, the final result of the area is distorted. I've tried the Setnull from raster calculator which worked but also for other pixels where their value is also 0(screenshot_4). Does anyone know how to solve this problem?

Thank you in advance.

Re: Problem with the pixel value

DavidPike — Thu, 26 Nov 2020 13:34:09 GMT

can you give an example of the distortion?

Re: Problem with the pixel value

DespinaTsigarida — Thu, 26 Nov 2020 13:39:12 GMT

Re: Problem with the pixel value

DavidPike — Thu, 26 Nov 2020 14:03:01 GMT

Looks like a logical result of the mismatched tiles, what are you expecting or wanting to see instead?

I guess you could interpolate the missing DEM values.

Re: Problem with the pixel value

DespinaTsigarida — Thu, 26 Nov 2020 14:19:33 GMT

First, thanks for the reply. I just think that for the final report it's not aesthetically nice to be shown these 2 lines so I was hoping there was a way to correct the DEM. Also, in DEM there are no missing values. The pixel value of the problematic lines are 0.

Re: Problem with the pixel value

DavidPike — Thu, 26 Nov 2020 14:52:51 GMT

With the value as 0, its calculating a huge slope in those areas, which is logical. I'd definitely call those lines of 0 value missing data.