topic Sample (spatial analyst) bug in 10.5.1.7333 in Geoprocessing Questions

Sample (spatial analyst) bug in 10.5.1.7333

MilesSpathelf1 — Fri, 26 Jan 2018 18:34:33 GMT

I have an issue where the sample tool incorrectly reports values from a raster when using a point file. For example a point lies entirely within a raster cell and the sample tool provides a result of "49" when the identify tool correctly provides a results of the actual cell value of "19"

Re: Sample (spatial analyst) bug in 10.5.1.7333

MilesSpathelf1 — Fri, 26 Jan 2018 18:40:32 GMT

Pertinent files

Re: Sample (spatial analyst) bug in 10.5.1.7333

DanPatterson_Retired — Fri, 26 Jan 2018 20:01:10 GMT

Your tiff... info reports a value for R, G, B

Your shapefile just has totally unrelated attributes.

What values are your expecting? and by chance are there other layers in your dataframe?

Re: Sample (spatial analyst) bug in 10.5.1.7333

MilesSpathelf1 — Fri, 26 Jan 2018 20:34:16 GMT

The Tiff has 6 bands

The point shapefile is used for sampling and wouldn't need to have related attributes.

No other layers are in my data frame

For example when I sample band 5 alone I get these values from the Sample tool in the output table

topo_seque 1 (alluvial site) - 49

topo_seque 2 (mid slope) - 48

topo_seque 3 (upper slope) - 44

From the identify tool I get these values by identifying from all layers and selecting each point ID in turn

ID 1 (alluvial site) - 53

ID 2 (mid slope) - 45

ID 3 (upper slope) - 19

Re: Sample (spatial analyst) bug in 10.5.1.7333

DanPatterson_Retired — Fri, 26 Jan 2018 21:02:24 GMT

Do your sample results look like this? I only have 10.6 available. What looks different is what is assigned to RGB if you have 5 bands

Re: Sample (spatial analyst) bug in 10.5.1.7333

MilesSpathelf1 — Fri, 26 Jan 2018 21:10:02 GMT

topo_seque	X	Y	Nenana	Nenana_1	Nenana_12	Nenana__13	Nenana__14	Nenana__15
2	401429.02948200000	7163313.14168000000	48.00000000000	38.00000000000	27.00000000000	86.00000000000	45.00000000000	24.00000000000
3	401266.54579100000	7164533.69165000000	44.00000000000	28.00000000000	21.00000000000	39.00000000000	19.00000000000	12.00000000000
1	401537.77284400000	7160962.54168000000	49.00000000000	33.00000000000	26.00000000000	83.00000000000	53.00000000000	26.00000000000

Hmm, I do get the same results as you when I bring in the tif as all bands instead of just band 5. In my table the Nenana__14 is the same as the original band 5. This reports the correct values unlike when I ran the sample tool on just band 5. In that case I only selected band 5 within the tif to bring into ArcMap and ran that with the sample tool.

Re: Sample (spatial analyst) bug in 10.5.1.7333

DanPatterson_Retired — Fri, 26 Jan 2018 21:16:49 GMT

I wouldn't have just isolated a single band for some reason... perhaps what band 5 is another column... who knows... but if the whole is right then 10.5 and 10.6 are reporting the same (I wouldn't use the info tool as defacto standard since I was getting only an r,g,b value and I didn't know what it chose for r, g or b)

Re: Sample (spatial analyst) bug in 10.5.1.7333

MilesSpathelf1 — Fri, 26 Jan 2018 21:23:05 GMT

Sorry I don't follow your logic. The sample tool and info tool bring back the same values when the sample tool is ran on the entire multiband tif file. The sample tool brings back different values when ran on just band 5. I'm not concerned about what was chosen for r,g, and b as the display option.

For some reason there is a difference in the results with the sample tool depending on if the multiband file is brought in as a whole or if just one band is added. That seems like it could pose a serious problem.

Edit: As it turns out it is reporting the correct values for band 1 even though I only brought in band 5. I think that's the issue.