topic Re: Null Values with Extract Multi Values to Points in Geoprocessing Questions

Null Values with Extract Multi Values to Points

MichaelWhitby1 — Wed, 21 Sep 2011 14:47:37 GMT

When I use the Extract Multi Values to Points (Spatial Analyst) all my points receive a <null> value even though there are values in the rasters (DEM and aspect) where the points are located.

I tested the Extract Values to Points tool, and the results were correct; However I would like the values in the original point file and to do multiple rasters at once. Any suggestions on what might be wrong?

Re: Null Values with Extract Multi Values to Points

RobDunfey — Tue, 22 Nov 2011 18:20:34 GMT

Same issues here. Tried shape file, SDE, checked CRS of dataframe and rasters. Extract Values to Points works fine, Multi Values returns null?

Re: Null Values with Extract Multi Values to Points

DavidAslesen — Wed, 30 Nov 2011 18:19:49 GMT

Same problem here. Didn't work for either discrete or continuous GRIDs.

Re: Null Values with Extract Multi Values to Points ANSWER

DavidAslesen — Wed, 30 Nov 2011 18:36:56 GMT

As posted on other threads, the point file and raster(s) need to be in the same coordinate system as the GP tool does not do on-the-fly projection during the processing. I tried it and it works.

Re: Null Values with Extract Multi Values to Points

JulieBlack — Wed, 01 Feb 2012 13:39:33 GMT

I have the same problem, and all my layers in the same projection. It appears that a problem occurs where one of the rasters has 'null', the tools then just assigns 'null' to that point for all other rasters which are below it onthe list of input rasters. Very frustrating, I don't have a fix yet being carefully choosing the order you put your raster layers into the tool, but this can't always work when differnt rasters have different areas of missing data!

Please ket me know if anyone has a better idea.

Re: Null Values with Extract Multi Values to Points (SAME PROBLEM)

ChrystinaBemment — Mon, 20 Feb 2012 14:10:45 GMT

I have the same problem, and all my layers in the same projection. It appears that a problem occurs where one of the rasters has 'null', the tools then just assigns 'null' to that point for all other rasters which are below it onthe list of input rasters. Very frustrating, I don't have a fix yet being carefully choosing the order you put your raster layers into the tool, but this can't always work when differnt rasters have different areas of missing data!

Please ket me know if anyone has a better idea.

We have had the same problem and have wasted a lot of time trying to determine the cause. In the end, we've had to mosaic the rasters, which also takes a lot of time, and read the values from the one raster to points (none overlap). Yes, very frustrating! Please can ESRI address this issue?

Re: Null Values with Extract Multi Values to Points

JonasSchwaab — Sat, 03 Mar 2012 09:18:35 GMT

I had the same problems. I then decided to change the NoData cells to a value (http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/How_to_change_NoData_cells_to_a_value/009z000000ms000000/). After that the tool "Extract Multi Values to Points" worked absolutely fine. It is probably time consuming, if you have to change NoData to value for each Raster. Instead I used a simple loop (python-script) to do it. That was fine for me then.

I hope that helps you somehow!

Re: Null Values with Extract Multi Values to Points

RebeccaKlaus — Thu, 08 Mar 2012 03:36:16 GMT

I had a similar problem with null values and found that it was because the file was open in ArcMap. When I closed the file values came out fine. I also had a problem trying to extract values from an unsigned 16-byte multi-layer raster *.img file. I got nonsense negative values. This was solved by converting the file to a floating point image, then values came out just fine.

Re: Null Values with Extract Multi Values to Points

YvanStg — Wed, 11 Sep 2013 15:24:25 GMT

Has Esri come up with an official answer and solution for the problem ?

I am having the same problem today, but the tool worked fine a few weeks ago. It is really depressing that something that was working fine before just starts acting weird. Nothing seems certain anymore and it's hard to trust any tool.

Re: Null Values with Extract Multi Values to Points

RyanDeBruyn — Wed, 11 Sep 2013 16:55:29 GMT

YVanGS,

What version of the software are you using? Including this info, is helpful to narrow down any related issues.

Regarding to the issue identified in this thread with respect to NULL values, there was an issue found when an input point fell on a cell that had a NoData value and multiple input rasters were provided. This issue (http://support.esri.com/en/bugs/nimbus/role/beta10_1/TklNMDgxNDY2), was resolved in 10.1 SP1.

If your input contains NoDATA, one workaround as mentioned a post, was to use a loop to iterate through each input raster individually. This can be done is a python script or Model Builder using a raster iterator.

Any further issues you have it is best to contact technical support and submit an issue directly, that way we can work towards resolving the issue or providing the proper information for you to continue with your work.

Regards,
-R

Re: Null Values with Extract Multi Values to Points

YvanStg — Wed, 11 Sep 2013 18:06:12 GMT

Hi Ryan,

I use ArcGIS Desktop 10.0.
Does the SP1 apply to ArcGIS 10.0 as well ? or only 10.1 ?

I made a model using the solution provided in this thread, but even that is not as efficient as the tool used to be. I am still confused in regard to why a tool that worked fine before does not work anymore even though I am using the same datasets, same projections, same version of ArcGIS.

best,
Yvan

Re: Null Values with Extract Multi Values to Points

RyanDeBruyn — Wed, 11 Sep 2013 19:19:36 GMT

Hi Ryan,

I use ArcGIS Desktop 10.0.
Does the SP1 apply to ArcGIS 10.0 as well ? or only 10.1 ?

I made a model using the solution provided in this thread, but even that is not as efficient as the tool used to be. I am still confused in regard to why a tool that worked fine before does not work anymore even though I am using the same datasets, same projections, same version of ArcGIS.

best,
Yvan

The fix is only available in 10.1 SP1 and greater.

Not sure as to your difference. Something must have changed, make sure your repro steps are exactly the same. Perhaps the order of rasters has an effect in your case? If only one of your datasets has nodata values, try to put that raster as the last raster in your input list. You would need to investigate your point locations and rasters to tell. To trouble shoot... you can look at the result of indiviual rasters to verify if any points fall on a raster NOData (null) cell. Keep in mind if format .shp NoData will be 0, and NULL in a file geodatabase.

Goodluck.

Regards,
-Ryan

Re: Null Values with Extract Multi Values to Points

StellaHubert — Fri, 18 Oct 2013 09:31:44 GMT

I have installed ArcGIS10.1 and SP1 but when I use the Extract Multi Values to Points with a multi-layer tiff I want to get the values from, the program writes the same first value into all columns of the file.

I desperately need to use the tool. Any ideas what is wrong????

Re: Null Values with Extract Multi Values to Points

RyanDeBruyn — Fri, 18 Oct 2013 15:02:36 GMT

I have installed ArcGIS10.1 and SP1 but when I use the Extract Multi Values to Points with a multi-layer tiff I want to get the values from, the program writes the same first value into all columns of the file.

I desperately need to use the tool. Any ideas what is wrong????

This issue was resolved in the next release of 10.2.1

http://support.esri.com/en/bugs/nimbus/role/beta10_1/TklNMDg1MTI4

Sorry for the inconveinence. The work around solution for this is to add each of the individual bands of the raster as input, rather than one parent raster dataset.

Re: Null Values with Extract Multi Values to Points

CaitiSteele — Tue, 26 Nov 2013 19:53:22 GMT

This issue was resolved in the next release of 10.2.1

http://support.esri.com/en/bugs/nimbus/role/beta10_1/TklNMDg1MTI4

Sorry for the inconveinence. The work around solution for this is to add each of the individual bands of the raster as input, rather than one parent raster dataset.

I have the same problem with the first value being written across all fields (v.10.2). The link above does not seem to link to 10.2.1. Unless I'm missing something? As for the workaround, I have 242 fields in each raster file and 10 rasters to extract points from. files. Entering 2420 layers individually as a workaround is not a welcoming idea.

Any other ideas? Or is there an alternative link to 10.2.1?

Re: Null Values with Extract Multi Values to Points

RyanDeBruyn — Tue, 26 Nov 2013 21:25:55 GMT

I have the same problem with the first value being written across all fields (v.10.2). The link above does not seem to link to 10.2.1. Unless I'm missing something? As for the workaround, I have 242 fields in each raster file and 10 rasters to extract points from. files. Entering 2420 layers individually as a workaround is not a welcoming idea.

Any other ideas? Or is there an alternative link to 10.2.1?

The link references the defect (NIMBUS change request) that was resolved. You would need to sign into arcgis with your global account to view the details. This may or may not be of any help to you.

This particular issue is with multiband raster as input. The workaround suggested would be to specify each of the indivual rasters bands as input rather than the single multiband raster dataset.

This result of this tool will only extract the value of each input raster specified. So if you have 10 input rasters(or bands), you get 10new fields (the VALUE for each).

What is your ultimate goal or requirment? Can you provide the steps you are following to produce your issue? If possible I would recommend to contact customer support for assistance, there we can get your issues resolved in a timely manner.

Regards,
-Ryan

Re: Null Values with Extract Multi Values to Points

CaitiSteele — Wed, 27 Nov 2013 17:12:58 GMT

Hello Ryan,
With respect to the link ... I did try to sign in with my personal global account, but it goes nowhere - just returns me to the sign-in page. should I have our site rep use the site global account instead?

The workaround is proving laborious. I have 10 raster files, each with 242 layers. I want to extract values from each of those 242 layers to a points shapefile containing 425 points. This would result in a shapefile containing 425 rows and 245 integer fields (including FID, geometry and ID)

To test the process (in ArcCatalog, using Extract Multi Values to Points) I used a subset of the point data (25 points) and I clipped the multilayer raster to the same extent as the points file. I added all 242 layers from the clipped multilayer raster file as "input rasters" by dragging and dropping from "Contents". This took a long time to load - at least 30 minutes. From the screengrab, perhaps you can see the next issue. The output layer name for layer 1 became Layer_1_10; Layer 10 became Layer_1_11 and so forth. In trying to change the output field name, it is taking around 4-5 minutes for the entry to "stick". During that time ArcCatalog hangs and gives the message that it is "not responding".

In ArcGIS 9.x I would use Hawth tools to do this (http://www.spatialecology.com/htools/isect.php) ... right now I am hunting for alternatives to "Extract Multi Values to Points" unless there is a more efficient way to this workaround.
thanks,
Caiti

I will have our Site rep contact ESRI Customer Support with this issue too.

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Re: Null Values with Extract Multi Values to Points

RyanDeBruyn — Wed, 27 Nov 2013 19:06:46 GMT

Thank you Caiti, that is helpful.

So for one case you have a raster dataset with 242 bands. Adding them all at one time the validation in the tool is taking a long time, because there are so many layers, with each change it has to validate all of them again. That is a big pain and I can understand your frustrations.

Please contact customer support and log a bug for this issue when loading many layers into the tool.

My suggestion at this point,
1) Use a file geodatabase point feature instead of the shapefile. The field issues will improve as there is no field name length limiations as in shape fie. Also it supports <NULL> (nodata).
2) How savy are you with python? Best bet would be to loop through the raster bands one by one and extract the value. This would mimic running the tool if mutlibands was working correctly for you. I created a sample scipt tool. See the attached .zip file. Run the tool and specify the full path to your input (fgdb feature, input multiband raster dataset). Give it a whirl.

Feel free to modify it as needed.

Good luck.

-Ryan

Re: Null Values with Extract Multi Values to Points

BrianEddy — Sat, 31 Oct 2015 00:30:36 GMT

This is an old thread, but I had this problem over the past couple of days - and could not figure out how to fix it. I was trying to run it from within ArcMAP (10.3 - just recently installed) - and I guess that was the problem. I closed ArcMap and ran it from within Catalog and it worked (as someone suggested above).

The thing is - why shouldn't this also work from within ArcMap?

Brian

Re: Null Values with Extract Multi Values to Points

curtvprice — Sat, 31 Oct 2015 04:38:36 GMT

Compare the environments in effect when you ran it in ArcCatalog versus ArcMap. (The environment is shown in the Results tab.) Often when the tool runs in one app and not in another that is the cause for the different behavior.

But with EMVTP, who knows, it and its sister tools (Extract Values To Points, Sample, etc.) are a puzzle.