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Questions tagged [spatial-analyst]

Spatial Analyst is an extension within ArcGIS that provides a range of spatial modeling and analysis tools.

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Results of focal statistics in ArcGIS Pro

Based on the instructions on how focal stastics work: https://pro.arcgis.com/en/pro-app/latest/tool-reference/spatial-analyst/how-focal-statistics-works.htm, I had expeced a more continuous result ...
ego_'s user avatar
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Marxan in ArcGIS Pro

I have been using Marxan to run conservation prioritization but I wanted to see if ArcGIS have something similar. I am just wondering if someone here has already used Marxan in ArcGIS Pro?
user249555's user avatar
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35 views

Setting parameters in a tool using values from a table

I have to run the Fuzzy Membership tool for more than forty different instances. Each instance has unique minimum and maximum values. Some have the same inputs and all have different outputs. I have ...
P. Simon's user avatar
1 vote
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31 views

Raster calculator giving unexpectedly large and integer results

I am trying to divide one raster ("s05") by the other ("d_05") and the resulting raster ("SdivD") is giving me some suspicious values. I am using ArcMap. The raster s05 ...
user453153's user avatar
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Excluding data from DTM using ArcMap

I am using ArcGIS 10.8.2 and I would like to estimate the least cost path between points. I am using a DTM with two lakes and I would exclude these from the least cost path estimation. I made some ...
Roberto's user avatar
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Exclude data from DTM

I am using ArcGIS 10.8.2 and I would like to estimate the least cost path between points. I am using a DTM with two lakes and I would exclude these from the least cost path estimation. I made some ...
Roberto's user avatar
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ArcGIS Pro Slope Tool failing with Output measurement and Z factor parameter in C# [closed]

The code below with 3 parameters fails to run slope tool and get expected result. No error is shown. Just expected result doesn't come out. public SlopeTool(string inRaster, string outRasterName, ...
Shahadat Hossain's user avatar
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28 views

ArcPy Con and SetNull do not recognize constant value

I have a script that requires the SetNull and Con tools to change values in a raster. Here's some examples: # changing 0 to NoData, all other values to 1 background_removed = arcpy.sa.SetNull( ...
Sam's user avatar
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Understanding the output of Kernel Density Analysis

I want to create activity hotspot maps (heat maps) of bird pairs using the Kernel Density tool in ArcGIS Pro, but can not for the life of me make sense of the output values. I've read all the help ...
Antonia's user avatar
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2 answers
64 views

ArcGIS Pro Zonal Statistics not working properly

I am trying to use Zonal Statistics to determine the highest point within polygons. I previously did this in ArcMap w/o problems, but now I am finding that certain polygons are only partially ...
William's user avatar
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Iterating over 2 input raster folders for raster calculator in ArcGIS Pro ModelBuilder

I'm currently on a project in ArcGIS Pro where I want to calculate the RVI of a RS time series collected by Sentinel-1. Unfortunately, I only have for each date one Tif-file for the VH and one Tif-...
womateer's user avatar
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Resolving basemap fit and pixel size challenges in SMAP L3 Radiometer Global Daily 36 km EASE-Grid Soil Moisture

How can I ensure that the SMAP L3 Radiometer Global Daily 36 km EASE-Grid Soil Moisture Version 6 raster data aligns correctly with the basemap, considering that the raster image is not fitting ...
5302_NavinKumar.J_2ndYr_Geo's user avatar
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1 answer
33 views

How to sum assigned scores of multiple rasters into an output raster in Raster Calculator

I'm using ArcGIS Pro. I have multiple rasters, each representing a water quality characteristic. I assigned a score for each characteristic. A couple rasters have different scores. I want to overlay ...
meich's user avatar
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14 views

Combine tool returns a large attribute table

The Crux of the problem is my attribute table being too large. I need a way to combine rows of a raster to preserve some values and erase/change others. What started this problem, however, was likely ...
Zafer's user avatar
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How to assign weights to classes of a raster image

I am relatively new to GIS and I'm working on a practical for the assessment of areas sensitive to desertification using MEDALUS Method. To obtain the Sensitive areas, I am to compute the geometric ...
StaceyM's user avatar
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Large values while calculating on normalized difference indexes

I've encountered a problem while calculating NDDI index (NDVI-NDWI/NDVI+NDWI) in ArcGIS Pro for my bachelor's thesis. I'm working with Raster Calculator (the problem appeared in both Image Analyst ...
Macko01's user avatar
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29 views

Raster calculator for RUSLE (six factors)

I am using ArcGIS Desktop 10.8. I have tried many time to estimate soil loss by RUSEL, using R, K, LS, C and P factors. However raster calculator failed. The message suggest was here: Error 000539 2)...
Endale Bekele's user avatar
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82 views

Fill hole in a raster

I'm currently using ArcGIS Pro to process my Maxent output (habitat suitability). There's a hole in it and I'm planning to fill it with the nearest data. I've tried using the "Fill" tool but ...
MapperIndo's user avatar
1 vote
0 answers
41 views

Creating Streams from endpoints and NHD Stream Layer using ArcGIS Pro with Spatial Analyst

I have a dataset for instream flow water rights that delineates the length of stream based on upstream and downstream endpoints and the miles of stream. I'm trying to create a GIS layer for this ...
Bri's user avatar
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25 views

Sum rasters without clipping

I'm using Raster Calculator in ArcMap. Is there a way to make operations between rasters in a way that the output raster is not clipped with the same extent of the smaller raster considered in the ...
Marco Fioraso's user avatar
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Error running Spatial Autocorrelation (Moran´s I)

I am trying to run the Moran´s I, but the ArcMap keeps sending the message in the picture below. I am trying to analyze spatial autocorrelation of some socioeconomic data in neighbourhoods in a city (...
Bruno Alzamora's user avatar
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77 views

FlowAccumulation working when run as geoprocessing tool but not in ArcPy

I have a problem with this code: #actual problem code flow_dir_rast = flow_dir in_weight_raster = mine_flac_weight data_type = "FLOAT" flow_direction_type = "d*" # run the flow ...
Felix Chan's user avatar
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16 views

Creating table from distance raster

I have made a distance raster in ArcMap using the Euclidean Distance tool from one town to another that appears to be OK (see attached image). I'm trying to determine the distance from each parcel in ...
Dill's user avatar
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1 answer
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Introducing formula in Raster Calculator of ArcGIS Pro

What is the correct way to introduce this formula in the raster calculator? It is the formula in order to calculate m-coefficient for L factor for RUSLE model. O = slope in degrees I tried multiple ...
gis1234's user avatar
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Generalization of classified raster: reassigning class after Region Group and Nibble

I want to do a Generalization of classified raster in ArcGIS as it is described here: Generalization of classified raster imagery. The documentation includes following steps: 1. Majority Filter, 2. ...
Katrin's user avatar
  • 11
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22 views

Using values in raster to extend a raster/polygon to contour/LiDAR value

I'm using ArcMap. I have a raster of flood levels (LiDAR + a water depth). I want to add 50mm onto the flood level raster which I can do with raster calculator. But then what I want to do is 'extend' ...
Duck's user avatar
  • 21
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42 views

Moving points along road line to generate start and end points 200 meters on either side of original point using ArcGIS Pro

I tried to keep it succinct in the title, but here is basically what I'm trying to do (I eventually need to script this using Python): Generate a start point 200m in one direction from the bridge ...
userfriendly's user avatar
0 votes
1 answer
56 views

Raster calculator gives black map output when excluding values

I'm trying to generate an exclusion map from 7 layers of raster having values of zero and one. The zeroes represent the unsuitable area while the ones represent the suitable area. with this, I'm ...
Yfunfur's user avatar
1 vote
1 answer
187 views

How to calculate average raster index values using window around specified points in ArcGIS Pro

I am using ArcGIS Pro 3.1 and would like to calculate the average index values of a raster within pre-defined areas. I have a raster layer containing index values for each pixel. I also have several X-...
Joseph Teresi's user avatar
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1 answer
129 views

Distance Accumulation script execution in ArcGIS Pro [closed]

I am currently working on a project that involves the generation of multiple distance accumulation rasters for a large set of features (volcano buffers) in ArcGIS Pro, using Python. Specifically, I ...
Ttz bng's user avatar
-1 votes
2 answers
126 views

Automate transects within polygon

I have a river polygon file and want to make transects parallel to the flow of the river. Transects can be any length, but must be 100 m apart from each other. I need enough transects to "cover&...
Jill's user avatar
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1 vote
2 answers
82 views

Using ArcGIS Pro to calculate required height of debris dam structure in stream when expected volume to retain is known

I have the locations of potential debris dam structures to be placed in a stream and know the contributing watershed area and the estimated debris volume (in m3) that would flow down that watershed ...
scoite's user avatar
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1 vote
0 answers
99 views

ArcGIS Pro - ERROR 010167: Could not open workspace <undefined>

I'm trying to run the Extract by Mask tool in ArcGIS Pro 3.1.2 to extract areas of a raster overlain by a polygon layer. I keep getting: ERROR 010167: Could not open workspace . I have tried ...
Luanita Snyman-van der Walt's user avatar
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0 answers
109 views

ArcGIS Pro: Raster Con fails with Error 010423: random temp file does not have valid statistics as required by the operation

What am I trying to do: I am attempting to use the CON function in ArcPy to create a raster of all areas within my area of interest with an elevation between 1600 and 1650 meters above sea level based ...
Sir_Zorg's user avatar
1 vote
1 answer
277 views

What does ArcGIS Kriging use lag size for, if semivariogram model (range, sill, nugget) are prespecified

Using the Kriging tool in ArcMap I'm a bit confused on the meaning of parameters. The interface asks for lag size, and optionally range, partial sill and nugget. My understanding is that lag size is ...
Sideshow Bob's user avatar
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0 votes
2 answers
42 views

Use the EucDistance function of ArcPy in PyCharm

I failed to calculate the Euclidean distance with the EucDistance function in the PyCharm. The codes are as follows. import arcpy from arcpy import env from arcpy.sa import * arcpy.env.overwriteOutput ...
zongxu li's user avatar
1 vote
1 answer
153 views

ArcGIS Pro - Raster Calculator Percentiles - conditional

I want to 'cap' the values of a raster if it exceeds the percentile value. For example if the 95th percentile value of the raster was 10000, then anything at or above that value would be assigned a ...
Daniel Sim's user avatar
-1 votes
1 answer
136 views

Calculating bamboo index

I am working on my project on bamboo distribution using RS. As per the literature, I found that bamboo indices is calculated as: BI = (NDVI-SI)/(NDVI+SI); Where NDVI is vegetation index and SI as soil ...
Walker's user avatar
  • 301
0 votes
1 answer
32 views

Find the area of a raster created from drone data

I am trying to find the areas for a series of drone captured mosaic tiff data using ArcMap 10.8 which are irregular in shape. I have tried using Raster Calculator and multiplying by 0 to then use the ...
Karyssa's user avatar
  • 21
1 vote
1 answer
53 views

Moderate raster values based on another raster

I am trying to make a soil erosion risk model using raster overlay in ArcGIS Pro. I have calculated soil erosion risk in raster calculator by combining the following risk factor rasters: slope ...
Bill's user avatar
  • 43
0 votes
0 answers
20 views

Areas don't add up using Raster Calculator & and Tabulate Area

I'm using & (AND) in Raster Calculator for two rasters and then using Tabulate area to work out the area of each in a polygon layer. But the amount in the resulting table is more than the amount ...
rowan eisner's user avatar
3 votes
1 answer
80 views

Reset the NODATA to negative value error

I have a requirement for converting NODATA to value -3 with my floating point data. I have tried to reset NODATA by using Raster Calculator with the formula of Con(IsNull("tif"),-3,"tif&...
JENN's user avatar
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0 votes
1 answer
165 views

How do I create a polygon layer of high slope (>58%) area from a DEM in ArcGIS Pro

I am hoping to get from a slope raster (calculated from a 10m resolution DEM) to a polygon of areas above a certain grade (58%). I am using ArcGIS Pro 3.1. I have used the Raster Calculator tool to ...
Andrew Muloford's user avatar
1 vote
0 answers
70 views

Get the pixel value of a raster object using Python and ArcPy

I used the following code to get the pixel value of specific location of a DEM image (in GRID format): import arcpy from arcpy.sa import * inRaster="C:\\data\\dem" slop_temp=Slope(inRaster) ...
GIS2000's user avatar
  • 11
1 vote
0 answers
26 views

ENDISI calculate

I'm new to ArcGIS. Can someone tell me why my ENDISI always equal to 1? My algorithms: ("band02.tif" - 16170.19 * (("band06.tif" / "band07.tif") + "mndwi.tif" ^ ...
Duy's user avatar
  • 11
0 votes
0 answers
25 views

How to change the order or sequence of land types in ArcGIS

I am trying to use the raster calculator to compute the landuse land change and to that the raster sequence has the to be the same but what it looks like currently is the following: These maps are ...
findingnemo's user avatar
1 vote
1 answer
86 views

Raster calculator multiple expressions

i have the following rasters: soilrisk, slope, rainfall How can I create an expression that meets the following conditions? (Soil risk = 1 and Slope > 7 and Rainfall < 800) OR (Soil risk = 1 and ...
Bill's user avatar
  • 43
0 votes
0 answers
91 views

Why does the Least Cost Intelligence path tool work on another computer but not mine?

For my final project in my GIS class, I am creating a least-cost path pipeline from a start point to an endpoint within a study area boundary (that being a park polygon). This tool takes a total cost ...
Justin Pan's user avatar
-4 votes
1 answer
70 views

Extract raster attribute other than value to points in ArcGIS Pro using ArcPy

I have a raster with two attributes, Value and Category. I would like to extract the Category to points. I am using Extract Multi Values to Points, but this always defaults to the Value attribute. Is ...
user222975's user avatar
2 votes
0 answers
139 views

Iterate over a list of raster with Arcpy and apply Con() to each raster

I would like to iterate a list of raster objects and apply Con() to each raster. The rasters are in a specific order in the list. That's important. All I want to do is to write the value of the ...
Gero's user avatar
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