Questions tagged [geoprocessing]

Geoprocessing is a GIS operation used to manipulate GIS data. If you are performing geoprocessing using ArcGIS then the tag Geoprocessing-framework is specific to that software and should be used instead.

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18 views

ArcGIS Pro Append Issue (field contains both text and numeric values) [duplicate]

I've got a workflow that appends values from a CSV file into a geodatabase table. Using field mapping, I've got the CSV column mapped to a text field. The issue I have is that the CSV column ...
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11 views

Bypassing Optional Layers for Series of Differences in Graphical Model

I am working on a graphical model which uses succeeding geoprocessing differences but some layers to subtract are optional, however each step subtracts more depending on the layer. Example iterative ...
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39 views

Output singlepart features by default for tools and algorithms in QGIS

In QGIS, many algorithms and tools return multipart geometries. For further processing, a conversion Multipart to singleparts is necessary. This is a bit cumbersome. To make just one example: when ...
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27 views

Why do the results for the "Grid Index Features" geoprocessing tool in ArcMap and ArcPro differ?

I'm trying to create grids for an area using the Grid Index Features tool in ArcPro. The grids should be a specific width and height and cover the given area. I've created a shapefile for the area ...
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44 views

Geoprocessing buffer "." files are not supported for this algorithm

I am trying to buffer a layer which worked earlier. I recieve, The "." files are not supported for this algorithm Other tools give me the same error along with Fix Geometries, Reproject ...
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49 views

Performance in reading and writing rasters using Python and GDAL

I've been thinking about how to improve my plugin's performance, which involves a lot of operations in chain (always getting the result of the previous algorithm). One of the problems I noticed is ...
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2answers
73 views

Extracting raster values to points using ArcMap

I am working on a project to determine the coastal vulnerability. I have different variables like elevation, LULC, bathymetry, etc. of the entire study area. I am stuck in the middle of my analysis. ...
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26 views

Compare two linear layers with geoprocessing tools

I'd like to know how can i have in output two layers, composed by one of the two layers in input, comparing the geometry and attributes of the 2 input layers (test_1 and test_2) using geoprocessing ...
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2answers
96 views

"Difference failed" error when using difference tool with point layers as input and overlay in QGIS

Is it possible in QGIS 3.16 to use the geoprocessing tool "Difference" with point layers as input and overlay? The documentation seems to indicate that it is. However, when I do a test with ...
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67 views

Using spatial buffer to "declutter" and retain point data in ArcMap

I have a shapefile of point data (lat/lon points) that I need to "declutter" a bit, based on a 15 km spatial buffer around each point. The image below shows what the data points look like, ...
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47 views

Geometry Object geoprecessing fails

Theoretically, ArcPy geometry objects can be used as inputs and / or outputs in geoprocessing tools, just pass arcpy.Geometry() as an argument for outputs. However, I have come across several tools (...
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15 views

Unexpected Result after Terrain Preprocesing using ArcGIS Pro

I am using ArcGIS Pro, and I didn't expect that with the use of Arc Hydro tools for dendritic terrain processing, the drainage point and line symbols are oversized and I can't even customize them to ...
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1answer
82 views

ArcPy using SearchCursor with Geoprocessing to perform operations on each row

I have a shapefile, that has lots of individual rows. My goal is simple, to export each row as a raster. I am trying to use SearchCursor, to select each row and perform a feature to raster conversion. ...
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1answer
85 views

How to create a straight line from start and end vertices of a line using Qgis?

I want to create a straight line from two vertices of a line which are not straight, but I should be getting a straight line joining the start and end vertices of this curve line. I want to attain ...
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1answer
54 views

Viewing entire Python script of process ( input settings and environment settings) in ArcMap

When you "copy as python snippet" from the results of a process, the script contains all of the input settings but does not contain the environment settings. Why is this? Is it possible to ...
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16 views

Removing the underlying polygons to only get the top polygon

I'm trying to do a suitability analysis in ArcGIS Pro but I've seem to run into a problem with overlaying polygons that shouldn't be overlaying. I put all the data into a weighted sum and then divided ...
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1answer
28 views

Orfeo Toolbox output rasters are 300x larger than inputs of the same size

I am trying to use Orfeo Toolbox CLI to do some processing, e.g. Smoothing: otbcli_Smoothing -in path/to/mosaic.tif -out output/smoothing.tif uint8 -type mean For now, the input, mosaic.tif, is just ...
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18 views

Archiving activation in ArcGIS Web AppBuilder

When I allow archiving, ArcGIS also keeps old records of the data. When I publish this application, can I deactivate the current record of any detail and activate the old record? For example; I have ...
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2answers
38 views

Converting a slightly warped polygon lattice with irregular edges to a raster

I have a problem which has been frustrating me for a while. I have a lattice of polygons which is slightly warped due to unknown CRS transformations & distortions, enough so that the side lengths ...
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68 views

Process large ROI in GEE

I am calculating the VCI for Europe, but the ROI is too large for a single run in GEE. How can I divide it and process it in chunks so that when downloaded they fit into a single image/composite? var ...
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22 views

Using Apply Symbology From Layer feature when source layer's symbology is based on field built using custom expression

I cannot find how to set the "Source field" in the "Apply Symbology From Layer" tool when the layer I'm trying to copy from has its symbology based on a custom field. Here are some ...
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1answer
36 views

Merging features with the same values within feature class

I have a feature class of land parcels that contain "ownername" and "land_use_code" fields. Some of these features have the same values despite being two different parcels in ...
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26 views

Geoprocessing Results window does not open, as well as bottom right pop-up window with report link (eg: ANN .html file)

Suddenly, totally out of the blue, the Geoprocessing Results window doesn't open anymore (ArcMap 10.8. I click on the drop-down menu and nothing happens. The pop-up mini window which appears at the ...
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30 views

QGIS: vector union produces a single feature only, same as the input layer

I have two layers in QGIS 3.16, a MultiPolygon layer with a single feature, the area of Papua New Guinea a MultiLineString layer of OpenStreetMap roads, clipped to the extent of the first layer ...
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1answer
19 views

Creating global Geoprocessor object for ArcObjects application?

I have an application that does many operations including some Geoprocessor tasks. Should I create a single Geoprocessor() object for the lifetime of the application or should I create a new one each ...
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3answers
2k views

GEOS geoprocessing error when using difference tool in QGIS

I am using QGIS version 3.14.0. I have about 20 polygon .shp-files with overlaps between files. All are in the same projection. I've been using the difference tool to remove the overlaps and then ...
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1answer
215 views

Point to line tool to link all pairs of points in ArcGIS Pro

I have a series of points which I want to connect together as a web, with lines between all possible pairs of points. I'm sure I've done this before using the points to line geoprocessing tool, but I'...
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2answers
38 views

Sync changes from view to feature class (using a GP tool; without fully replacing the data)

I have an ST_GEOMETRY view with 50,000 rows (in an Oracle 18c/10.7.1 geodatabase). The view references a WORKORDER table in an external system (via a dblink/Oracle 12c). Problem: The view is too slow ...
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1answer
95 views

How to choose limited number of points to represent a point grid

I need to choose a few points to represent the grid below, e.g: 8 points in the grid below. This point need to be geographic distributed This points needs to be geographic distributed. Lets see a bad ...
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73 views

Merging/unifying polygons from same layer when boundaries are touching using ArcGIS Desktop

I have a big layer full of polygons. The ones that are separated, are individualized. However, I want to join the ones that have their boundaries touching each other (look at the image). For example, ...
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159 views

Making a pivot table in ArcGIS using Standard license

Having issued with using the pivot table tool in ArcGIS Pro due to the license level, I want to know if any geographer here knows how to make the pivot table of pivot table-like output using a set of ...
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2answers
248 views

How to average multiple GeoTIFF images?

To be short: how can I average two (or more) GeoTIFF images? Explaining: I'm working with coastal water turbidity, using NASA Worldview images. I can easily visualize them in Jupyter Lab (Windows 10) ...
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1answer
311 views

What is the difference between "Random Forest" and "Forest-based Classification and Regression" in ArcGIS Pro?

ArcGIS Pro (2.6.0) has tools to train Random Forest (named Random Trees in ArcGIS) and Support Vector Machine. Afterwards, the tool named "Classify Raster" contains the algorithms to apply ...
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47 views

Connecting individual road segments that participate in a dead end

I am trying to get a road feature class ready to do some analysis, regarding dead end roads. I have a road dataset cleaned up with continuous single segments, split at each road intersection. I have ...
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1answer
202 views

Intersecting large shapefiles onto grid in QGIS

I have 21 separate shapefiles containing data for Ireland as various polygons on QGIS 3.10. I'm trying to intersect each shapefile onto a 250m² grid of Ireland so that I'll have 21 separate shapefiles ...
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28 views

ArcMap location queries

I'm new to ArcGIS and am trying to determine sites that meet a series of geographic criteria including: within various distances of certain features, as well as within a distance of one layer but not ...
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1answer
266 views

Creating geopackage layers as output with QGIS batch processing autofill option

Is it possible to use the Calculate by Expression tool to output geopackage layers. For example, with the batch option for the polygon to line function. With the following expressions I can create ...
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1answer
187 views

Batch processing GPX tracks

I have a manual QGIS system that starts when I load a GPX file into QGIS and perform a number of actions on it. It all works perfectly. I want to automate this process using the QGIS Graphical Modeler,...
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1answer
69 views

QGIS: Dissolving stacked polygons into non-overlapping "donut" features

I am trying to get my head around what I think is a fairly straight forward geoprocessing problem: I have created a polygon contour layer. However the polygon features are stacked on top of each other ...
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2answers
327 views

Finding Overlapping/Close Points of Same Layer in ArcGIS Pro

I have a dataset of point features with photo attachments of street signs from volunteers through the Survey123 app. The app records their location which ultimately creates the point feature. Part of ...
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1answer
102 views

Sampling raster data and classifying the pixels

I'm completely new to python usage in GIS. I'm working with Sentinel images and want to sample the pixels of raster file only in the places which are represented by the geometry of the truth data ...
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94 views

Outputting temporary feature layer from geoprocessing script tool to current map (ArcGIS Pro)

This is my first time attempting to create a script tool. I have gotten my script to work when running it in the Python window in ArcGIS Pro, however running from the script tool is slightly different....
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71 views

Adjusting Points with Offset using ArcGIS Pro

I have a collection of GPS points that were collected along a road over the course of a few years. Some years are right where they are suppose to be, but others are offset by 500 feet. Another year's ...
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164 views

QGIS: How to speed up raster processing?

Is there any way to speed up raster processing in QGIS? I have seen discussion about speeding up rendering and querying, but not processing. I am using SAGA tools to calculate morphometrics and the ...
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1answer
114 views

Donut shape related to concentric circles in QGIS

I would like to get an area between 10 miles and 20 miles from the center of counties. To do that, I wrote the code and got the following image. But, as you can see, there are some empty points, as ...
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513 views

How is Topographic Position Index calculated?

My understanding of how topographic position index is calculated is: TPI = cell value - (mean of cell values within defined neighborhood) But, I see that Weiss' original poster (http://www.jennessent....
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1answer
854 views

"Failed to load system tools" error from ArcGIS Pro Geoprocessing

I updated my ArcGIS Pro to the latest version, and after opening a project and clicking on the Geoprocessing tab I get an error that starts Failed to load system tools which is then followed by a ...
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27 views

Join the fields (column) into headers after geoprocessing

I am new on QGIS, I will try to be as specific as possible, but it seems quite hard to explain... I am working with a first polygon vector: species' territories [In the attributes table: 50 lines, for ...
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156 views

QGIS Python: Creating a split seperate Split Vector Layer by Shapefile:SyntaxError: invalid syntax

I have been following this solution of my Question to make the Vector Split algorithm output in the shapefiles: Splitting vector layer into shapefiles (not geopackage) using QGIS?. The Thing is I want ...
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1answer
103 views

NDVI calculation

I am a newbie in PyQGIS. I start to write my own simple code to automatically calculate NDVI from Landsat 5. Here is my code: from PyQt5.QtGui import * from qgis.analysis import * land_3 = 'D:\...

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