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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16 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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1answer
173 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
27 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
30 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
82 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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38 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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27 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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11 views

ArcGIS Polygon to Raster Cell Assignment Manual Threshold

I was wondering if there was any way to apply a user-set area threshold for the cell assignment parameter of the Polygon to Raster tool in ArcGIS. For example, I'd like to only assign a cell if the ...
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1answer
40 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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33 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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32 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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33 views

Intersecting large shapefiles onto a 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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27 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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47 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
72 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
39 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
41 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
52 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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29 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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22 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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62 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
64 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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100 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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27 views

Is there any way to see a computational complexity of a tool?

For example, if I run a tool, ModelBuilder or ArcPy script and I select it's input data and parameters. Is there any way to see how complex the algorithm is in some kind of units? After the tool has ...
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1answer
184 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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40 views

Calculate and map gains and losses of mangrove extent over time (vector data) QGIS

I have a shapefile containing polygons (area of mangrove) per year for 35 years (=35 shapefiles). I would like to map changes of mangrove extent over time. I want to map gains and losses (colour ...
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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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15 views

Using a hillshade function as processing template while adding rasters to a mosaic in ArcPro 2.5.1 does not work

I have a workflow in Arc desktop 10.6 where I add bathymetry raster source mosaics of different cell sizes to a master mosaic as type table and apply a hillshade function at the same time. (This is ...
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58 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
52 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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1answer
21 views

Does MakeTableView work with field_info in ArcObjects?

gp.Execute(new MakeTableView() { in_table = $@"Database Connections\os@gisuat.sde\TESTGIS.SOME_POLY", out_view = "SOME_POLY", ...
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1answer
87 views

Seperate each row of points from shapefile with latitude and longitude information [closed]

I have a shapefile which has point geometry points with latitude and longitude values.The image when opened in QGIS looks similar to the below picture and I want to know whether I can separate each ...
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1answer
28 views

Divide batch of polygons inside shapefile into aligned grid using ArcGIS 10.4 [duplicate]

I have a polygon shapefile that contain a batch of rectangular polygons with almost equal dimensions. These polygons are not touching each other, they are on some distance. Now I want to split or ...
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1answer
15 views

Working out the area of certain class types within a polygon

I am trying to use a DEM to determine land management units based on combinations of slope and aspect. As per the task I have created three individual boolean 'Class' rasters which have specific ...
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1answer
103 views

Saving as/export results of GeoVisual Search (Descartes Labs)

I am working with satellite imagery processing. I'm using this service to search for some objects in the US: https://search.descarteslabs.com Can I export about 1k results, for example, to KML or ...
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1answer
57 views

Importing map found on the Internet to QGIS [closed]

I am new to QGIS and I have learned some of the basics. Now, I have found a Soil Map of Germany I want to work with on the internet. My tasks now are as follows. To reduce the size of the map with ...
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2answers
64 views

Generate parcel-adjacency polygons?

I have a parcel layer (blue polygons) and a road centerline layer (black lines). I want to generate polygons that represent the portion of the road right-of-way that is adjacent to each parcel (...
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0answers
28 views

When to choose between a raster or vector format?

I'm trying to decide how to best serve data layers on a map. The data will be preprocessed on the server. The workflow I'm currently trying to implement goes as follows: Acquire satellite imagery (eg....
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0answers
66 views

Creating building's shadow over buildings in QGIS

I want to create a map with the shadows projected from the building. There are a few methods to create this, but all of them are not so accurate. The Translate Method has the problem that is not ...
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1answer
29 views

Capacitated Vehicle Routing Problem with Categories

My problem resembles the capacitated vehicle routing problem but there is an aspect to it to which I've been unable to find a solution in tools like ESRI's Network Analyst. The problem is to find the ...
2
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2answers
51 views

Cannot reuse output feature class in a custom geoprocess using ArcObjects

I'm developing an arcobjects 10.4.1 custom GeoProcess (fusion shift) which has to be able to run within a model builder. The GeoProcess seems to run smoothly, but the problem is it needs to be ...
6
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2answers
204 views

Polygons from two different shapefiles that share common border in QGIS?

I have two shapefiles, which are village administrative units in this case. Given that these two shapefiles share a common boundary/border is it possible to get the border units (villages) on both ...
2
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0answers
41 views

QGIS 3.4 Select by Location Returns Geometry Error - Processing Settings Ignored

I am using QGIS 3.4 on Ubuntu 18.04. I have a county wide city boundary polygon layer and a county wide building footprint polygon layer. I would like to select all the buildings that are within a ...
2
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2answers
45 views

At what stage is it best to project your data? Or does it even matter?

I am doing a series of geoprocessing steps in ArcGIS with a couple different datasets, for a global analysis of habitat loss and impacts on biodiversity. I have raster forest cover tiles and polygon ...
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1answer
31 views

Using Union tool without optional overlay layer

In QGIS 3.10.3, I'm trying to figure out how to use the Union tool without the optional overlay layer. When I go to "Vector > Geoprocessing Tools > Union..." and bring up the tool, the ...
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0answers
27 views

Create a polygon from a line layer [duplicate]

I am using QGIS 2.14. I am trying to create a polygon from a line layer(roads) so that I can clip layers within that area, but my output layer will not clip any other layer only the roads it lies ...
3
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1answer
121 views

Remove polygon overlap based on id in Python

I have a Shapefile consists of multiple polygons, where I want to erase the overlap based on the id. An example to visualize the problem: import geopandas as gpd from shapely.geometry import ...
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1answer
58 views

Batch Create Circle Sections based on center point, radius and azimuth range

I have over 1000 points with radius and min/max azimuth. I need to create a circle section based on these three columns for each point (buffer each point by radius but only keep the section between ...
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0answers
61 views

When clipping an input vector layer with many polygons, polygons which overlap the boundary of the clip layer are not included in clipped layer

This seems like a simple issue, but searching all the questions and answers here I cannot find the solution. I have a vector file made up of many polygons (it is a layer of vegetation types). I want ...
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1answer
19 views

Geoprocessor cannot find input data, but only for some users

I am developing a stand alone application that at some point needs to run Dissolve on a subset of data in a feature class. This code works for me without issue, regardless of workstation. When another ...

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