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Dan_Patterson mentioned Spatial Analyst 2 days ago Show mention context Hide mention context

Re: Extractbymask Mosaic datasets very slow

Dan_Patterson mentioned Spatial Analyst 2 days ago

This is posted in ArcGIS Online... are you sure you want it posted there rather than Imagery and Remote Sensing or Spatial AnalystPreview Hide preview

wcs_kortsalo in Spatial Analyst7 days ago (Show more Show less)

Create points based on temporal attributes on multiple features

I have traffic data that shows tracks that have start and end times (in YYYYMMDD-HHMMSS format) and the speed the vehicle was moving. Each feature represents one track (line) with specific speed. For one vehicle there are thousands of features. Example: Vehicle Start_time End_time Speed Vehicle1 20181115-140505 20181115-140632 35… (Show more Show less)

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n.ueberschaeresri-rw-esridist

in Spatial Analyst1 month ago (Show more Show less)

Resampling a raster - better method needed than nearest

Hello helpful people! I have a raster with population data that has a resolution of 30.8 x 30.8 meters. Each grid cell has a number of population living in this grid cell, there are grid cells in between which don't have any population and there are areas with higher population. Values range from 0 to about 50. To make analysis of the numbers… (Show more Show less)

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n.ueberschaeresri-rw-esridist

(to curtvprice) 1 week ago (Show more Show less)

That's an interesting idea, thank you!

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DougHaller in Spatial Analyst1 week ago (Show more Show less)

Snap Pour Processing Issue

Can anyone take a look at the workflow I am using, see screenshot of Results and TOC, and explain why I cannot get past the Snap Pour step as explained by esri on the following page...How To: Create a watershed model using the Hydrology toolset I can create fill, flow direction, flow accumulation layers/shapefiles but I cannot complete the… (Show more Show less)

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cdspatial

(to DougHaller) 1 week ago (Show more Show less)

Another possibility - the Flow Accumulation step often results in an output raster with values for almost every cell. Since the Snap Pour Point process will evaluate every cell that is not null, sometimes it can be worthwhile to create an intermediate raster to use with all cells below a threshold set to NULL to make the Snap Pour Point process…

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lahal7 in Spatial Analyst1 week ago (Show more Show less)

Finding set of points with given difference in elevation and max distance apart.

Hi all, Bit of a noob here so bare with me, love to be pointed to other questions relating to this if they are out there. I am using a DEM and need to find locations (sets of two points) within the map that have a difference of elevation of >200m and are at maximum 2000m apart in distance on the x-y plane (along the ground). It is a large file… (Show more Show less)

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Dan_Patterson

(to lahal7) 1 week ago (Show more Show less)

have you extracted the elevation to the points? Extract Values to Points—Help | ArcGIS Desktop That would give you that data at least. Is there a chance that you could also add the X, Y coordinates to the table so that you have X, Y and Z Add XY Coordinates—Data Management toolbox | ArcGIS Desktop And I forgot to mention, You need to be…

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sassy19a in Spatial Analyst4 years ago (Show more Show less)

What does the output value of the Sink Tool mean?

Hi, I just used the Sink geoprocessing tool to identify the Sinks in my Flow Direction model How do I know what the depth of the sink is so that I can fill up the false positives? The attribute table has a field called values, and it ranges from 5,000 to 7,000 plus. Does this indicate the depth, and if so, what unit of measure does that… (Show more Show less)

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curtvprice

(to DougHaller) 1 week ago (Show more Show less)

Doug, the Sink tool identifies sink cells by examining a flow direction raster. Any cell with a value that is not a power of two is a sink cell. If you run the sink tool and get a NoData raster, there will be no data to look at, and no attribute table.

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

User Input for Raster Reclassification

I am writing a Python script for an analysis that includes reclassifying multiple rasters that are all in the same file geodatabase. Some of these rasters have quite a few fields. Writing the remap parameter as a list of lists is doable, but will take long and be clunky to read through for future modifications of the script. Is there is a way to… (Show more Show less)

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Dan_Patterson

(to nickdisebastian) 1 week ago (Show more Show less)

Is there a reason you don't want to run the script from a toolbox? User input into python would be kludgy, so a workaround would have a text file that the user could edit prior to running the script, or even simpler, but requiring most skill on the user, would be to edit the parameter list directly in the script

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bibiannjiru447 in Spatial Analyst2 weeks ago (Show more Show less)

Problem while trying to generate slope form DEM

Hello GeoNet Community I have encountered a problem while trying to generate slope form DEM.1.Using the Arc hydro tool I am getting the error"Error HRESULT E_FAIL has been returned from a call to a COM component. "Kindly help.Thanks Have also used spatial analyst tool and getting the error message" ERROR 999999: Error executing function.… (Show more Show less)

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bibiannjiru447 (to Dan_Patterson) 2 weeks ago (Show more Show less)

I have changed my working folder to drive C and the spatial analyst tool is working.However, with Arc hydro the error is still the same.

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mograham in Spatial Analyst3 months ago (Show more Show less)

How does bilinear resampling work when converting a 10 meter raster to 30 meter?

There is a 10 meter resolution land cover raster. An analyst wishes to resample 10 meter raster to 30 meter raster. The analyst selects the Bilinear Resampling technique in the Resample tool of the Raster Processing toolset of ArcGIS 10.3. ArcGIS 10.3 help defines the Bilinear Resampling technique as: Performs a bilinear interpolation and… (Show more Show less)

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curtvprice

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

Resampling is usually inappropriate for this use case (down-sampling 10 meter data to 30 meters) -- as data will be dropped/ignored when creating the output raster. I suggest considering the Aggregate tool. How Aggregate works—Help | ArcGIS Desktop

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roberto.filloramo in Spatial Analyst2 weeks ago (Show more Show less)

Viewshed Analysis suggestion

Hi, I am using ArcGIS 10.1 for Viewshed Analysis, as paramenter I used OFFSETA 1,65mt, OFFSETB 1,65mt and RADIUS2 15000mt. I used both the Viewshed tool and the FuzzyViewshed model (model built on the base of the Ogburn's calculation, https://www.researchgate.net/publication/320490670_Fuzzy_Viewshed_ArcGIS_toolbox). Moreover, I used DTM (8x8) that… (Show more Show less)

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