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

Tabulate Area results greater than area of input zones

I have a polygon feature class of zones within a watershed, which I'm using to define zones to tabulate areas of land uses from a land use raster. But...the sum of the areas in the resulting table is very close to double the area of the feature class. Any suggestions? In the meantime I'll try working around it by either changing the polygons to… (Show more Show less)

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SChatterjee-esristaff

(to mnoteboom) 6 days ago (Show more Show less)

Hi Matthew, can you please share the polygon feature class data with us? You can email me at schatterjee@esri.com Also, what version of the software are you using? thanks, Sarmistha

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

What kind of license is needed to access GeoAnalytics Server?

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

Detect change in agricultural land using satellite imagery

Hello! I am working on a project where I am trying to detect the expansion of sugarcane crop area over time, using 10 m Sentinel-2 imagery. The area I am researching is about 460,000 acres. Currently I have approached this task a number of different ways. I have used the imagery difference tool for two images converted to NDVI. I have also… (Show more Show less)

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insyzygy in Spatial Analyst5 months ago (Show more Show less)

Reclassification of Raster: Slice by Specified Area

Hi, I need to reclassify/slice a raster by Specified Area. The functionality seems to be in the Slice function but, only Equal Area. For 5 classes, Equal Area forces the area for each class to be 20% but it would be great if I could specify the area for each class, e.g. 11%, 22%, 33%, 22%, 11%. Does anyone know a workaround for this?

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

Hi, Just poking this issue. I would like to know whether anyone has tried classifying a raster by specifying percentage area by class. This would be similar to histogram equalization but, more accurately, histogram shaping where the central class would have the largest area and the classes either side taper off to a minimum? Thanks!

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

Symbology Classification Failed

I have several raster datasets that I am trying to apply a classified symbology to. I would like to use the Natural Breaks method, but when I select the option I am met with the following error: "Classification failed. Please choose different data or classification method". You can see the error in the attached screenshots along with the data… (Show more Show less)

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hs100789 in Spatial Analyst1 year ago (Show more Show less)

Georeferencing issues

Hello, I recently upgraded to 10.5 from 10.2.1. Everything was going fine until I tried to georeference. Everything would be fine until I hit 'Update Georeference' at which point the tiff would move to a different location. Usually it would just be scooted down, but every now and then it would be moved off into no man's land. I researched trying… (Show more Show less)

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Deanjo98 (to hs100789) 2 weeks ago (Show more Show less)

I also have this problem that appeared when we upgraded from ArcMap 10.3 to 10.6. I too am trying to georeference .tiffs derived from .pdf. The georeference seems to shift to the south or southwest hundreds of feet when I hit the 'update georeferencing' button. I too have thought about the coordinate system but see no issue. I have deleted the…

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

Raster calculator "if, then, else" statement

Does anyone know if in Raster Calculator it is possible to build more complex condition than with the Con tool? I would like to create a new column in my attribute table and evaluate the values in this column based on few different columns, e.g: if value in column A > 50 give me A, then if value in column B > 50 give me B, then if value in… (Show more Show less)

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LDreyfuss-esristaff

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

Hello, If you're working with a raster with an attribute table (and it sounds like you are), a better tool might be the Field Calculator, which can incorporate python scripts to process if/else statements. Here's some of the documentation on this: Fundamentals of Field Calculations…

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

How to select the maximum value in a row

I would like to know if there is a way to find a maximum value in an attribute table in a row. I have few columns representing different valuables of an object and I would like to know which variable has the highest value across all of them? Is there a ready to use function to do this? Thanks in advance for your answers.

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GSCUser85

(to GSCUser85) 2 weeks ago (Show more Show less)

Those variables minval, minfld should of course be named maxval, maxfld for clarity.

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rhowell2 in Spatial Analyst3 weeks ago (Show more Show less)

Different results between Zonal Statistics and Zonal Statistics as Table?

I have a collection of about 1300 points and for each point I want to get the average of a raster layer within a 50 m buffer. I have overlapping polygons. I've been scouring the forums for days now and I still haven't been able to come up with a solution that works. Here's an idea of what my data looks like My current workflow is to to run… (Show more Show less)

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rhowell2 (to Dan_Patterson) 2 weeks ago (Show more Show less)

The points are locations from wildlife GPS collars, but I will look into the possibility of dissolving some of the buffers and consolidating areas a bit. Thanks for all your input

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steinmetzt_NIWA in Spatial Analyst3 weeks ago (Show more Show less)

How does the list of tools in Image Analyst compare to Spatial Analyst

- there are tools which are licensed so you can have one of both extensions, but it's hard to make a comprehensive list of which tools overlap. FMV (Full Motion Video) is an obvious one & Deep Learning - what are the others? Is there a whitepaper or table anywhere that compares the capabilities of these two extensions? We are trying to evaluate… (Show more Show less)

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

Thanks Dan - I had not seen that! - it's exactly what I needed (guess I couldn't see the forest for the trees...) , Cheers Tilmann

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