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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19 views
Creating IDW of up to 20,000 points in ArcGIS Desktop? [on hold]
I am create IDW interpolation of 60-70 points in ArcGIS. It takes 2 minutes. But when I create IDW of 20000 points in ArcGIS, it takes at least 4 hours and 30 minutes. I want to ask why takes much ...
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0answers
12 views
Assigning risk class to risk variables in Coastal Vulnerability Index? [on hold]
I want to assign risk ranking as 1, 2 and 3 for the risk classes to caculate the Coastal Vulnerability Index. I have 7 physical parameters. They are geomorphology, mean sea level, tidal range, ...
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16 views
Examples of web maps with spatial analysis/SDSS [on hold]
I'm doing some research on web maps that allow spatial analysis (or a web based spatial decision support system) and looking for good examples.
Haven't been able to find many except for Examples at ...
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1answer
14 views
Merging layers in cost distance analysis to account for other variables?
For example, say I was rafting down a river but there was a small bridge in the way. That would significantly change the difficulty but not necessarily stop the progress.
Is there a way for me to ...
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1answer
21 views
ArcGIS CutFill raster output to polygon
I've got a raster with the cut fill tool, its attribute table shows volume information which I'd like to pass to a polygon overlapping the raster.
The polygon was originally used to clip a raster ...
2
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1answer
34 views
Replace the empty cells of one raster with the values of a second raster
I have 2 rasters with the same extent. In the first raster, there are a lot of empty cells that I want to replace by the values of the second raster.
I have tried Raster calculation with the following ...
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23 views
Writing Arcpy TopoToRaster for loop?
I have a script that iterates through the double fields in a shapefile and then creates a raster using TopoToRaster but I keep getting an error at the moment it begins with the "Enero" field, this is ...
2
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1answer
21 views
Neighborhood Analysis with ArcGIS Spatial Analyst to Calculate Percentage
I have a raster file where the cells (1 meter) are classified as 1 (forest) and 0 (non-forest). I would like to create another raster (1 meter) where each cell is given the percentage of cells within ...
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25 views
What is “resolution preserving cell size projection method”? in ArcGIS 10.7
I have read Introducing the new resolution preserving cell size projection method but I am still confused what does it mean for a analyst practice.
I primarily work using PCS systems and often ...
1
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1answer
45 views
Using ArcGIS Pro raster calculator to give cell value based on cells in its neighborhood?
I have a land cover dataset, I want to find forested cells that are adjacent (touch) agricultural cells.
Is there a way I can achieve this with the ArcGIS Pro raster calculator?
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9 views
Simulating random field with power law distribution using ArcGIS Desktop?
As far as I know, there are a lot of methods developed for simulating 2D random field with Gaussian distribution, such as geostatistical method, Fourier transform, etc. But a lot of geoscientific ...
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1answer
29 views
Using Boolean And to overlay layers in ArcGIS Pro?
I am working for a project related to a site selection in which I have 5 layers to overlay to have as result:
Zone1: area suitable
Zone2: area not suitable.
Boolean And seems to be the perfect ...
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0answers
29 views
Overcoming spatial bias in ArcMap or ArcGIS Pro?
I have a shapefile showing invasive plant locations but they mostly collected from more accessible places such as near roads or hiking trails.
Is there a method to correct this bias in ArcGIS ...
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0answers
36 views
Calculating flow accumulation in area using ArcGIS Spatial Analyst?
I want to calculate the total flow in an administrative area which is independent of the basin boundaries.
I used the DEM file from HydroSHEDS and so far I have followed these steps:
Spatial Analyst ...
3
votes
1answer
92 views
Zonal Statistics is returning null values in ArcGIS Desktop?
I am using Zonal Statistics as Table to obtain the Max height from a DEM for each polygon (then Joined to the polygons). For some reason, a lot of the polygons get NULL returned. All the polygons ...
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1answer
34 views
Understanding difference between area calculation when using zonal statistics tool and identify button?
I am working in ArcGIS Desktop 10.5 and I am a beginner.
I have very basic, non-overlapping polygons over a raster that represents bathymetry data. I need to figure out various statistics about each ...
2
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0answers
31 views
Writing Raster Calculator Expression?
I use ArcMap 10.3.
How do I create an expression in RasterCalculator that allows me to sum up 4 rasters (every pixel has an associated value) and the result to be 0 if any of the 4 values is 0?
For ...
0
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1answer
20 views
Creating new raster with minimum (or maximum) value betwen two rasters in ArcMap?
I am using ArcMap 10.3.
I have two temperature rasters from two months. I need to create a new raster from these, but the new raster should have in each cell the maximun value betwen the initial ...
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0answers
14 views
Making Cost Surface Distance map?
Projection is in NAD 83- units of measure in meters.
I have major roads NC vector data overlaid on Forsyth county in North Carolina.
I would like to create a cost surface distance map using this ...
1
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0answers
19 views
Controlling field names with arcpy.Combine?
If I run the arcpy.Combine command as such:
result = arcpy.Combine(["CDL/raster07", "NHD/raster07", "OtherRaster"])
The resulting raster has an attribute table with fields
[f.name for f in arcpy....
0
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1answer
27 views
Save output raster and automatically open in ArcMap? [closed]
I want to reclass (by Table) raster files, then perform raster addition of the output (reclassed) rasters, then automatically display the final output (raster SUM) in ArcMap. This is the code that I ...
0
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1answer
31 views
Spatially constrained multivariate clustering in ArcPy gives AttributeError?
i want to use the Spatially constrained multivariate clustering tool for a point shapefile. I'm using PyScripter. The shapefile is named "LITO2016_area_modelli_20190312_v2" and the attribute fields i ...
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0answers
22 views
Changing particular value of raster dataset to zero using ArcPy?
I try to change a particular value of raster dataset to zero using python script.
When I deal with one raster, it works. Python scripts as follow:
import arcpy
from arcpy import env
from arcpy.sa ...
0
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0answers
16 views
Weighted averages: accounting for cell size
I'm a non-geographer using ArcMap 10.6.
I have a similar question to the two asked here: Weighted averages: accounting for grid cell surface variation in proportion to the cosine of its latitude
I ...
1
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2answers
29 views
Calculate raster statistics for polygons in a polygon feature class
I have a DEM across my study area where symbology has been changed to show elevation changes in 100m intervals.
I have a polygon feature class where each polygon delineates a landslide.
My landslide ...
0
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0answers
28 views
Build measure of state change
I want to be able to build a measure in ArcGIS (ArcMap).
(1) I have some shapefiles of sovereign states by centuries. These are polygons with the name of the state as ID. (2) Moreover, I have a ...
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0answers
39 views
Cannot delete geodatabase while tool is running?
I have created a script tool that performs raster analysis. It publishes intermediate raster layers to a newly created, temporary workspace (in_memory does not work well with rasters so I don't want ...
0
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1answer
19 views
Creating user defined input to simplify Reclassify tool and negate need for remap
I would like to build a script tool using Arcpy that reclassifies a raster layer based on a single user input parameter. For example, if the user inputs the number 7, then 0 - 7 would reclassify as 1, ...
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0answers
33 views
Retrieve attribute with max value by group
I have a intersected counties shapefile with wind potential category attribute. What I want to do is to dissolve the features grouping them by county, and retrieve the WPC value which has the largest ...
0
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0answers
28 views
Understanding ArcGIS Flow accumulation result?
I have modified an existing DEM to produce two sinks - the brightest pixels, both with a dot drawn on them below.
I have verified that they are, in fact, the lowest points with the ID tool and have ...
0
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1answer
30 views
Understanding ArcGIS Flow Direction pixel values?
The range of values in my flow direction raster is 1-129.
D8 method was used.
I would expect 128 to be the largest value in accordance with the documentation
what's more I show values OTHER THAN 1,...
0
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1answer
16 views
How do I go from a TIFF with symbology to polygons for each label?
So I am trying to take this TIFF layer and convert it to polygons with their designated label
For example I want a shapefile that has polygons for "-11.374 - 0", "0 - 6", "6 - 13", and "13 to 20". I ...
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2answers
19 views
Performing Raster Calculation?
This is my formal:
("Standort_ger_fre_mosaic" ^ 0.4) *
("Habitattradition_raster_rec.tif" ^ 0.3) *
("Vollständigkeit_rec.tif" ^ 0.1) *
("Vorkommen_ungestörter_Lebensräume_rec.tif" ^ 0.1) *
("...
0
votes
1answer
51 views
ArcMap Raster Calculator with Python code
I'm trying use raster calculator that can export a raster to do different average values for for multiple layers. For example, I want to do averages for only the values and layers that are greater ...
0
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1answer
23 views
Testing for Pixel Agreement in ArcMap [closed]
Say I have 2 rasters with same spatial extent and same resolution and same number of classes:
Raster 1: Ground Truth.
Raster 2: Result of some algorithm.
I want to see what % of pixels have same ...
0
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0answers
17 views
Con statement with multiple AND fails
I have a conditional statement that runs through multiple rasters. It produces the correct output in Raster Calculator but not when I run the code. I don't get any errors, it just creates blank ...
1
vote
1answer
38 views
Solving ERROR 000732: Input Raster: Dataset Con( does not exist or is not supported in for loop? [duplicate]
I'm trying to reclassify rasters based on standard deviation. I created this code, but I think I'm wrong using "Con". I would like to assign value 1 to rasters >= to threshold and rasters <= to ...
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0answers
19 views
Attribute Table missing After Raster Calculator?
I want to remove zero value pixels from MODIS LST raster images and apply a moving window that can only substitute the missing values and leave the other original values with out alteration. I have ...
0
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0answers
25 views
Getting gridded population to resolution of land cover?
I have a population data at census tracts level and an impervious land cover. Impervious land cover is of 30 m resolution and census tracts data stored as a vector. Is there any way that I can ...
0
votes
1answer
37 views
Converting raster to array then CSV file using ArcPy? [closed]
I have a raster file and I would like to convert it to an array and then save it as a csv file with using ArcPy.
The reason is that I want to do some statistical analysis over each row and column in ...
1
vote
2answers
34 views
Replacing value of specific pixel using raster mask in ArcGIS Desktop?
I have two rasters: the first is a basin with all pixels values equal to 0. The second raster (mask) has a single pixel with value = 1. In fact, I need only one raster where all the pixels into the ...
0
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0answers
19 views
Running Cost Paths with Overlapping Points?
I am running cost paths on a data set with 60k points which represent farms. About a third of these points have the exact same coordinate (points can often represent village centers where the farm ...
2
votes
1answer
23 views
Performing localized raster edits using ArcGIS Spatial Analyst?
I have a raster image of water depth, float point values 1-15, in a very small area some erroneous values are in the raster with values of 100 - 375. I'm looking for a repeatable work flow in ArcMap ...
0
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0answers
35 views
Extract Multivalues to Points giving Error [000000_12301899]?
I am trying to run Extract Multivalues to Points in ArcMap 10.6 but I am getting an error code 000000_12301899. Below is a screenshot from the Results dialogue.
Also here are the inputs. The DEM is ...
0
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1answer
76 views
Find cells with 3x3 window [closed]
I have a raster and need to only identify cells that are adjacent within a 3x3 window.
I tried various tools but without any success. My current cells are 1x1 and currently using ArcGIS.
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0answers
19 views
QGIS 2.12 How can I assign the attributes of the polygons of the layer A containing the geometry of layer B?
In other words, I have two shapefiles:
Layer A: not-intersected Areas (1 attribute: ID);
Layer B: Buildings (Several attributes).
I want to identified by the related ID attribute all the buildings ...
2
votes
1answer
16 views
Connect sub model to cell statistics
I'm working on a bunch of raster imagery using ArcGIS 10.6.
I have a several sub models consisting of iterations of raster files. Here's one of them, the other do the same but with different ...
1
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0answers
21 views
How calculates weights for Weighted Linear Combination
I am using ArcGIS 10.1, I would like to use the weighted linear combination for generating a suitability raster. I understood that firstly I have to reclassify the raster involved (in my case: slope, ...
1
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2answers
98 views
How to create a single raster based on the values of three rasters (Conditional)?
I have three rasters of soil granulometric fractions (clay, sand and silt), all in %. I want to make a single raster of the soil texture classes. For that, I need to make some conditionals (i. e.: ...
0
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2answers
46 views
Loop through a range of rasters and use tool output as input for the next tool run
I'm using the particle track tool and limiting it to a specific trackingtime. For each tool run, I want the rasters input (magnitude and direction) to change to the next rasters in the lists, and the ...
