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mi931610 in Spatial Analyst2 weeks ago (Show more Show less)

Does it usually take extremely long time to execute geoprocessing functions when working with big files?

Hi, I have been working with a DEM of size 35GB geotiff file of a watershed and have been experiencing extremely long processing times to execute different geoprocessing tools such as flow direction, accumulation, stream orders, and even conversion from raster to other formats. I am using ArcMap 10.4, 10.6, and Pro. Is it normal to experience… (Show more Show less)

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NRajasekar-esristaff

(to mi931610) 2 weeks ago (Show more Show less)

Hi Min, I'm sorry to hear that you are experiencing issues with processing times working with large DEMs. There are a few things you could try to alleviate this issue and improve performance significantly. Here are a few things you could try: Leverage Parallel Processing Factor: Parallel processing with Spatial Analyst—Help | Documentation.…

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ben.shuski in Spatial Analyst3 weeks ago (Show more Show less)

Why am I getting null values for area and volume in my storage capacity output table?

I'm using the spatial analyst supplemental tools and I'm running the storage capacity tool using a DEM raster and a feature class that I've been working with for months now. I've been using the storage capacity tool every day to generate storage capacity areas for certain elevations, but out of nowhere it started giving me <Null> values where the… (Show more Show less)

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NRajasekar-esristaff

(to ben.shuski) 3 weeks ago (Show more Show less)

Hi Ben, Thank you for reaching out with this issue. I've sent you a direct message seeking further information and data so that we can resolve this at the earliest. Regards, Neeraj Rajasekar Spatial Analyst Product Engineer

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jotorppa in Spatial Analyst3 years ago (Show more Show less)

Focal statistics coordinate shift

In focal statistics, if the size of the neighbourhood is larger than a specific limit (for example 2 for circular radius), the output raster is shifted by the size of the neighbourhood... Seems like a bug, or is there a way to avoid this? ArcGIS Pro version 1.4.1.

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jlaguna-esristaff

(to curtvprice) 3 weeks ago (Show more Show less)

Hi Curtis. Thanks for the the suggestion. Anne-Marie and I are working on the exact scenario being used, and we'll update here once we get to the bottom of it. Cheers, Juan

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bibiannjiru447 in Spatial Analyst4 weeks ago (Show more Show less)

Hi all,I am using IDW to interpolate my data points in ArcGIS ,the default number of points in the search radius is 12.Is there a way to determine the number of points to use based on the available sample points?Assumming I have 50 sample points.Thanks

Spatial interpolation using IDW

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danretired (to bibiannjiru447) 4 weeks ago (Show more Show less)

How IDW works—Help | Documentation How inverse distance weighted interpolation works—ArcGIS Pro | Documentation basically covers the methodology available to you

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SpatialProf in Spatial Analyst4 weeks ago (Show more Show less)

Interpolating FROM points TO points (i.e. not to a new raster)?

Imagine I have two sets of XY points, lets call them A and B, roughly coincident in space. Points A also have an attribute, lets call it N. I’d like to estimate (i.e. interpolate) the same attribute N for points B. I could simply “copy across” the value from the nearest corresponding points in A and B, but this is no good for the use case I have… (Show more Show less)

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slynch-esristaff

(to SpatialProf) 4 weeks ago (Show more Show less)

In that case you could use IDW in Geostatistical Analyst to create a ga layer and then use GALayerToPoints which will use the interpolation parameters in the ga layer to predict a value at exactly the given locations. The ga layer, does no have a cell size, and is held in memory. You could also then do cross validation on your method.

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michael.mattaini in Spatial Analyst7 years ago (Show more Show less)

Extract by Mask issue

Hello! I've been working with a .tif of the National Landcover Dataset obtained from the National Atlas. I've been trying to use extract by mask on it (with the mask being a polygon), however I have been encountering a problem. The operation completes without error, however the attribute table is identical to the table of the input raster, and… (Show more Show less)

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Ecolog_esp (to DMelamed-esristaff) 1 month ago (Show more Show less)

Hi Dana I am happy to share the dataset. I will send you the two files by Google Drive. I basically solved the problem yesterday by using BIL format raster and not GRID. It definitely does not work with GRID rasters. Here is the link” https://drive.google.com/drive/folders/1QMGjHy_8XmBQLFPkcl6JFUfyHHcIwH16?usp=sharing …

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Curtis_Lisle_LearnArcGIS in Spatial Analyst2 months ago (Show more Show less)

Iterator not working

Hello, I am currently attempting a Least Cost Path analysis, specifically, a "From everywhere to everywhere model". Cost raster = Slope_Raster Surface raster = 0 value extracted_DEM Vertical Factor: Tobler Away To achieve thus multi-path approach, I made my destination (which, according to this model, will also become origins) points… (Show more Show less)

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curtvprice

(to Curtis_Lisle_LearnArcGIS) 1 month ago (Show more Show less)

Unclear to me why it would stop after three iterations. One thing I noticed though, I suggest you put the iterator inside a submodel so you don't run the path distance over and over again on every iteration. Iterators re-run all tools in the model (unless you somehow prevent this with a precondition logic - a sub model is an easier way to…

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mindbus2806 in Spatial Analyst1 month ago (Show more Show less)

Interpolation runs infinitely - never returns results

Attempting Spatial Analysis methods but the processing never stops, never returns results. Tried point density, IDW, kriging, others. Same results. Tried various maps. Opened new map. Same results. Different coordinate systems and same results. License is current and extension is enabled. I see no errors or evidence of wonkiness. Truly… (Show more Show less)

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danretired (to mindbus2806) 1 month ago (Show more Show less)

or try a "repair" first. Windows Add/Remove Programs... Remove, select Repair as the option. Sometimes repair is easier

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sptacek_NRDCINC7 in Spatial Analyst2 months ago (Show more Show less)

How do I derive slope from a very large DEM?

Hi there, I'm trying to calculate slope based from a national DEM - USGS 3D Elevation Program (3DEP), found here: 3DEPElevation (ImageServer) - and am having trouble with the spatial analyst geoprocessing tool given the size of the raster. When I try calculating slope in ArcMap Desktop, I get an error message saying that the file is too… (Show more Show less)

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curtvprice

(to sptacek_NRDCINC7) 2 months ago (Show more Show less)

Are you sure you need full resolution on this? Bandwidth may not be an issue, but processing zillions of cells with any neighborhood operator is just a LOT of data to process. Even if you downloaded tiles on the data it would take you weeks I'm sure.

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BFosberg in Spatial Analyst2 years ago (Show more Show less)

The goal is to join point data to lines.

The goal is to join point data to lines. I have 305 points and 1023 lines. The points are Crime Incidents, the lines are street lengths. The goal is to determine which street segments are the reported locations of the most crimes. Running the problem in ArcGIS 10.6 the results is exactly right. The join count total matches the number of points… (Show more Show less)

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Dan_Patterson

(to BFosberg) 2 months ago (Show more Show less)

The goal is to join point data to lines This must be the question you are trying to delete. The first line threw me off

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