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jborgion

in Spatial Analyst5 days ago (Show more Show less)

Generalize a Slope Surface

My adventure into creating and visualizing slope surfaces has moved into a third and possibly final chapter. See Using arcpy to create slope surfaces and Display A Slope Raster for chapters 1 and 2. I have a complete slope surface for the Oquirrh Range ( pronounced oh-ker) which bounds the Salt Lake Valley to the west. As you can imagine it… (Show more Show less)

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jborgion

(to jborgion) 4 days ago (Show more Show less)

Thanks guys. Steve Lynch: I thought I'd do it via python script and my thought was to hold whatever the interim raster would be in memory just because I don't need it. As mentioned, the raster I'm trying to simplify is in the form of a mosaic dataset and is 21,589 X 48,940 I'll take a look at reclassify Here is a hack I've tried: I made an…

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aditya206 in Spatial Analyst2 weeks ago (Show more Show less)

Flow Direction or Aspect: Which one is more suited to predict surface flow path?

I am new to GeoNet community and had tried to search for the answer to my question, but couldn't find one. So I am writing it down here to my GIS community members, asking for their help on it. If I was to depict the surface flow in a relatively small area of about 4 sq. Km area in a hilly terrain, would a flow direction raster (Hydrology… (Show more Show less)

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aditya206 (to nnoman-esristaff) 2 weeks ago (Show more Show less)

Hey Norman Thanks for such a detailed reply. I did read the extensive literature on this subject matter and understood the implications of using one over the other. Thanks a ton for the help. Addy

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

Raster calculator

Dear GIS experts. I can't get my raster calculator expression to run. I have two different raster datasets: - wnb_near - svo_near I want to create a new raster. When the value of svo_near ist smaller than the value of wnb_near, I want to write the value of wnb_near in the new raster, otherwise the value of svo_near: if svo_near < wnb_near,… (Show more Show less)

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nnoman-esristaff

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

Interesting question and great answers by everybody. As @Robert LeClair said, there are many ways to solve this problem. So, instead of getting into the solutions presented here, I would like to point out a few different things that could be relevant for getting the output @Barbara is looking for. The Con Statement and the use of quotation:…

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

Is it possible to delete classified points from point cloud?

I need to delete classified points within polygons? The goal is to delete non-ground points within polygons and keep the ground data. Please help! Thank you!! I'll then use the spatial analyst tool with the remaining points outside of the polygons.

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Dan_Patterson

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

Have you examined the tools in the Las toolset? Change LAS Class Codes—Help | Documentation

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

Is it possible to delete classified points from point cloud?

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jborgion

in Spatial Analyst2 weeks ago (Show more Show less)

Using arcpy to create slope surfaces

ArcGIS Pro 2.5 I have a number of .tif and ,img images that I need to convert into slope surfaces (as discussed here Display A Slope Raster ) and have been following the steps shown here: Slope—Help | Documentation . However, I get one of two errors depending on where I send the slope.save() to. Here is my script: import arcpy from… (Show more Show less)

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jborgion

(to DMelamed-esristaff) 2 weeks ago (Show more Show less)

Thanks for the tip Dana! I vacillate between arcpy and straight up python through out my scripting: that list came from an os.listdir() I ran on the directory where I had stashed the originals....

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WYing-esristaff

in Spatial Analyst3 years ago (Show more Show less)

How to extract raster values at point locations?

Many a times, in your analysis, you might need to extract values from rasters based on point locations. The Spatial Analyst extension offers several tools that can do this for you, those being Extract Values to Points, Extract Multi Values to Points and Sample. However, because there are some similarities between them, you may be confused about… (Show more Show less)

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andrescastillo08

2 weeks ago (Show more Show less)

This is great info. Thank you!

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jborgion

in Spatial Analyst3 weeks ago (Show more Show less)

Display A Slope Raster

ArcGIS Pro 2.5 This is new territory for me; I haven't created surfaces since ArcInfo 6.x with TINs.... I have a number of tif rasters that I am attempting to create a slope analysis from. I think I've created what I want, but I don't understand how to display it in a map. Basically I want to show slopes less than 25% in green, 25%-35% in… (Show more Show less)

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jborgion

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

That's another thing I need to figure out. It's great being a 63 yo rookie...

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

Divide polygon at a specified distance by parallel line

Is there an easy way to split a polygon at a set distance from a boundary using a line parallel to that boundary? E.g. I have an irregularly shaped field to split at different distances from a field boundary, which parallels the direction of the cropping rows in the field. In the image the field boundaries can be seen which are often not… (Show more Show less)

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HCPSLingham (to Dan_Patterson) 3 weeks ago (Show more Show less)

Hi Dan, Equal widths is no good. I have a field with a sugarcane crop. Sugar cane is grown in rows ~1.8 metres apart. I may need to split my polygon based on a number of rows of cane. E.g. 25 rows of a new variety (25 x 1.8). Cane row widths vary between 1.5 and 2.1 metres, and a cane field may need several splits. Cheers Rod Nielson…

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Nathan_Fleischman in Spatial Analyst6 months ago (Show more Show less)

ERROR 999999: Error executing function Failed to execute (Nibble)

I am trying to use the Nibble tool to clean NoData in three Digital Elevation Models. The problem is that for the first DEMs it works But the last one keeps giving me this error: ERROR 999999: Error executing function Failed to execute (Nibble). I tried in both ModelBuilder and manually and I still get the same error. It occurs during the… (Show more Show less)

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amajid.ms19igis (to Nathan_Fleischman) 3 weeks ago (Show more Show less)

To me It often happens when I do not save my output in a geo database.

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