All Questions
1,891 questions
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26
views
Quick way to reclassify raster into positive, negative, and zero classes
I have quite a few rasters I want to reclassify into three classes (positive, zero, and negative). I'm aware of the reclassify tool, but just wondering what the quickest way is to reclassify them. ...
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answers
34
views
Unrealistic standard deviation in Zonal Statistics of ArcGIS Pro
I'm using the Zonal Statistics as Table tool in ArcGIS Pro 3.2.0 to calculate the average raster values for each polygon feature (I have 4 polygons in total). While the mean values seem reasonable, ...
- 21
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0
answers
51
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Zonal Statistics as table not working in modelbuilder
When I use zonal statistics as table outside the model builder it works, but using it inside the model resulted in error.
I tried to simplify the model( making new one contain only the zonal ...
- 11
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0
answers
22
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How do Area Solar Radiation in ArcGIS account for the solar intensity?
I read that the Area Solar Radiation accounts for the position of the sun throughout the year and at different times of day, obstacles that may block sunlight such as nearby trees or buildings, and ...
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votes
1
answer
45
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Find Red Pixels on a Georeferenced .png (Raster) and Convert To Polygon
I have a .png which has been georeferenced.
There are rectangles on the png that are a particular shade of red.
I would like to convert the raster data (.png) to polygons so that I can find the ...
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0
answers
17
views
Iterate raster calculator operation over a pair of previous raster outputs
I am trying to create a ModelBuilder model that has to iterate a raster calculator operation over a pair of raster. I have 2 series of rasters for different sub-locations, like ...
- 1
1
vote
0
answers
35
views
Opening .img file created in Erdas Imagine 2023 in Erdas Imagine 2022
I am having an issue working with a file created in Erdas Imagine 2023 in Erdas Imagine 2022. I ran a tool with the output .img. However, the .img format seems to be different in Erdas 2023 vs Erdas ...
- 11
3
votes
2
answers
151
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Setting output raster bit depth using more efficient method than copy raster
I am looking to see if anyone has a more efficient method of setting bit depth for my output rasters than what I am currently doing. I am using ArcPy in ArcGIS Pro's notebook to create rasters from ...
- 31
1
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0
answers
72
views
Filling NoData values in raster with another raster's values in ArcGIS Pro using con(isnull())
I am currently working with two rasters in ArcGIS Pro: a masked raster (cloud_masked) where clouds and shadows have been removed, resulting in NoData values (holes), and an unmasked stacking raster (...
- 11
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answers
27
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ExtractValuestoPoints reorganizes the FID from each iteration
I have a shapefile that defines a line with 10,000 points.
I am iterating over a set of rasters and extracting the raster value on these same points for each raster. The output feature dataset it ...
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1
vote
1
answer
45
views
Inverted NDVI output using ArcGIS Pro [closed]
I am trying to perform an NDVI on multiple rasters in a folder. As I understand it, an NDVI output has a range of values from -1 to 1. Values 0 and above should represent vegetation and values below ...
- 41
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votes
1
answer
89
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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 ...
- 113
0
votes
0
answers
37
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 ...
- 25
1
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0
answers
48
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 ...
- 11
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0
answers
34
views
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 ...
- 71
0
votes
1
answer
45
views
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 ...
- 71
1
vote
0
answers
47
views
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, ...
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0
answers
55
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(
...
- 1
0
votes
1
answer
123
views
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 ...
- 1
0
votes
2
answers
167
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 ...
- 171
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0
answers
45
views
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-...
- 1
0
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0
answers
17
views
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 ...
0
votes
1
answer
45
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 ...
- 1
0
votes
0
answers
15
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 ...
- 1
0
votes
0
answers
31
views
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 ...
- 1
0
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0
answers
45
views
What data does clustering use from multiple raster files?
I currently have a series of rasters of the same area across different times. The data is categorical: the product of a supervised classification used on LANDSAT data run on ERDAS Imagine. Each ...
- 23
0
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0
answers
37
views
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 ...
- 1
0
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0
answers
46
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)...
1
vote
1
answer
97
views
Change select color in a raster in QGIS using Serval or Value tool
Is it possible to edit the table view of a raster that you see in the Value tool?
Alternatively
Using Serval, once we have a selection polygon can we choose a specific range of raster values within ...
- 8,298
2
votes
1
answer
108
views
Does QGIS have a functionality similar to Flicker in Erdas Imagine?
I am trying to replace an Erdas Imagine workflow with QGIS and I have got most of it working but can't find a solution for fliker. We have it set to turn an image on and off every few seconds to ...
- 8,298
0
votes
0
answers
34
views
Erdas - Export LUT Instead Of Real Values
I am using Erdas 2022.
I have NDVI index of an imaging, and after creating it, the view shows a LUT which is not the original pixels, which is essentially the automatic stretching of the program.
I ...
- 101
0
votes
0
answers
197
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 ...
- 31
0
votes
0
answers
46
views
Excluding 'No Data' Pixels When Counting number of pixels in an AOI with ERDAS IMAGINE
I'm working with Landsat imagery in ERDAS IMAGINE 2014 and have encountered an issue with 'no data' pixels within my Area of Interest (AOI). The AOI includes unwanted 'no data' pixels that are ...
1
vote
0
answers
52
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 ...
- 11
0
votes
0
answers
26
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 ...
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0
answers
72
views
What does the metadata tell you about an image and its sensor?
I'm using a software called ERDAS and my tutor says that the Metadata can be used to detect which sensor your image came from. Is there anything you can tell me that links the metadata to the sensor?
...
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votes
0
answers
22
views
Merging Subswaths with ERDAS Imagine
Does anyone have experience with merging subswaths of a SLC Sentinel 1 image in ERDAS Imagine? I cannot find the right function for it.
0
votes
0
answers
101
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 ...
- 61
0
votes
0
answers
19
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 ...
- 1
0
votes
1
answer
92
views
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 ...
- 319
1
vote
0
answers
60
views
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. ...
- 11
0
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0
answers
26
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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' ...
- 21
0
votes
1
answer
66
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 ...
- 5
1
vote
1
answer
422
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-...
0
votes
1
answer
162
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 ...
- 1
-1
votes
2
answers
223
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&...
- 1
1
vote
2
answers
113
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 ...
- 41
1
vote
0
answers
142
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 ...
0
votes
0
answers
138
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 ...
- 1
1
vote
1
answer
365
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 ...
- 2,343