Questions tagged [count]
For processes that involve enumeration or listing the finite number of iterations in an object, layer, feature, or other measurable instance.
262
questions
6
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4
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Creating new layer that shows the number of intersecting vector layers at each point in QGIS
I have a QGIS project file with over 50 layers, each representing a different species' habitat range.
I would like to create a new layer that adds up the number of layers at each point in the map and ...
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4
votes
1
answer
95
views
QGIS count points layer to polygon layer that have the same field attribute
From a layer with point geometry 'POINTS' and a layer with polygon geometry 'POLY'. Both layers have a common attribute field "UNIONCODE".
To the 'POINTS' layer I apply the following ...
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1
vote
1
answer
46
views
Counting points in polygons and adjacent polygons
I would like to sum up the amount of points in a polygon and in surrounding polygons adding certain weights.
Step 1. Here an example with one point: where the point is contained the weight should be ...
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1
vote
1
answer
77
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Counting outgoing links connected to a node [closed]
I've a large linear shape and I need to find all nodes with class >=3 connected to at least two outgoing links.
It's actually a sewage graph, I'm trying to identify sewer dividers.
I have read ...
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0
votes
0
answers
48
views
Counting features in Geodatabase using ArcGIS Pro
I try to find out the numbers of feature in a geodatabase. I can't find any tool or option in ArcGIS Pro 3.1.2 or ArcCatalog.
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0
answers
43
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Normalize county coverage data by population
I have point data where the result is either in coverage or out of coverage. I know that we receive far more in coverage results in high population areas, so I want to normalize the data by population....
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0
votes
0
answers
109
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Fire frequency calculation in GEE with FireCCI data
I have a problem with calculating the fire frequency (burned area count) in GEE. I want to calculate the counts of the fire in my study area from 2001-2020(the data availability of the FireCCI data). ...
2
votes
1
answer
172
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Showing feature count in layer name in QGIS
I'm looking for a way to write the feature count at the bottom of the Layer Name, is this possible? Is there a variable?
I know about the feature counting functionality built into QGIS and I know the ...
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1
vote
1
answer
100
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Summing up attributes overlapping polygons in QGIS
I have large single layers with many features overlapping, like this:
Where the features overlap I want the attributes added together.
I've managed to count the number of overlap polygons by doing ...
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3
votes
1
answer
101
views
Counting points from layer at map extent with QGIS expression
I want to create an expression in the QGIS 3.28 dashboard layer that counts points on a specific point_layer and with a specific value that is displayed in the current map_extent view
aggregate(
...
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0
votes
1
answer
116
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Use Overpass API to output different tag counts as CSV
I want to create CSV data with different OpenStreetMap tag counts for selected cities using Overpass API. Unfortunately, the "Counting Objects" section of the Overpass API Documentation is ...
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0
answers
105
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Displaying symbol size based on number of records with value in ArcGIS Pro
I am new to working in ArcGIS Pro.
I have a table of historical sites, each with a county location. I geocoded the table so now I have a point for each county that has at least one historical site. ...
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1
vote
2
answers
155
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Understanding the QGIS API documentation based on the featureCount() method with legendKey parameter
I'm trying to understand the QGIS Python API documentation - as an example I want to get the number of features with a specified legend key, but I don't get the correct result.
Under the layer ...
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1
vote
1
answer
73
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Summarize points by tag over each atlas feature with QGIS composer
I'm trying to represent in every single atlas feature the basin for several streams.
Each basin can have one or more stations. The data to plot is a point vector, with columns for "data" and ...
0
votes
1
answer
107
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Calculating trend of number of days exceeding the threshold in each year using Google Earth Engine
I am trying to generate a raster where each pixel will show a trend of days exceeding a particular threshold of maximum temperature in GEE. I have calculated the number of days exceeding the threshold ...
0
votes
1
answer
47
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Using Cadastral data to count number of Lots in a given Suburb based on calculated field AreaOfLot
I make use of my local Councils Cadastral data, and I'm looking to identify all properties over a certain area within the surrounding suburbs.
I have loaded in Layers for "Lot" and "...
0
votes
1
answer
85
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Count number of records with the same date
I have a table with species sightings and I would like to add a field with the sighting number in that day (every day should start again from number 1). Ideally this should be done automatically as I ...
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0
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0
answers
80
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Count grid cells overlapping with target polygon
I am working with ArcGIS Pro trying to obtain the number of grid cells of a polygon grid (purple) overlapping with different target polygons (green), e.g. 9 grid cells for the uppermost polygon.
The '...
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2
votes
1
answer
127
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How to automatically count intersecting geometries by excluding a layer and adding new layers with any layer name
I am using the following expression to count and label the number of geometries of a layer (POINTS1_TO_INCLUDE) that intersect with polygons of another layer (POLYGONS):
to_string(
round(array_length(
...
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3
votes
2
answers
92
views
Determining if no features in layer are selected using ArcPy
I am creating a custom geoprocessing tool and I only want it to run if at least 1 feature in a layer is selected. However when I use the GetCount tool if no features are selected it gives me the ...
0
votes
0
answers
326
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Count and list all polygon features within a polygon in ArcGIS Pro
I am trying to count and list the names of all individual layers that have polygons (in blue and green) within multiple target polygons (one example shown in orange) in a separate layer using ArcGIS ...
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1
vote
1
answer
137
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How to count features from multiple different layers in a grid in ArcGIS Pro 3.1?
The multiple features (points and polygons) are all a toxic chemical from different sources. The grid was created using the 'Grid Index features', so it is a polygon. Some grid cells have no features, ...
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1
vote
0
answers
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Getting total count in each grid cell from multiple point and polygon layers using ArcGIS Pro
I am using ArcGIS Pro 3.1.
The multiple point and polygon feature layers are sources of a toxic chemical but from different companies/studies/departments, etc. The grid layer was created with the Grid ...
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3
votes
1
answer
146
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Counting features in child table that are related to the report feature in QGIS
I am building out a report template in QGIS. I have a Field Group Section that generates a report page for every feature in Layer A. Layer B is related to Layer A in a many-to-one relationship like so....
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6
votes
1
answer
177
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How to label a point layer with the percentage of points within another polygon layer?
I would like to find a method using Geometry generator to label a point layer with the percentage of points inside another polygons layer.
I'm working on implementing a solution based on the COUNT and ...
- 1,152
5
votes
3
answers
1k
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Counting points per category in polygons using QGIS
I am looking for a QGIS function to count specific point values inside polygons. I have a number of points, all sorted in specific categories "HOOFDGROEP" and a rectangular grid (see image).
...
5
votes
1
answer
138
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Count the number of features joined by shortest_line function conditioned
Using the shortest_line function conditioned to a table attribute to return the shortest line joining features of the same layer as it shows in this expresion:
shortest_line(
$geometry,
...
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8
votes
7
answers
2k
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Getting the number of features in shapefile without opening it using Python
I have some big shapefiles that takes dozens of minutes if not hours to load. I was wondering if there would be a way to get the size of the files (number of rows) without loading them entirely. I ...
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3
votes
2
answers
902
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Counting seconds using QTimer in PyQGIS [closed]
I am having a hard time counting seconds in PyQGIS using QTimer. The current code waits for 1 second and prints 5 times "1" as output. I desire that after every second the output should be ...
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7
votes
2
answers
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Counting distinct values per polygon in QGIS
In QGIS I have a list of points, each with a town it's located in and a status, either 'new' or 'existing'. So something like:
ID
town
type
01
Alicetown
new
02
Alicetown
new
03
Alicetown
existing
...
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5
votes
1
answer
257
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Counting points in adjacent polygons using QGIS
I would like to sum up the amount of points in a polygon and its adjacent polygons. If possible, I would like to add a certain "weight" to the points of the adjacent polygons. Here is a ...
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3
votes
2
answers
153
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Counting points in hex grid by attribute in QGIS
I'm trying to count points within a polygon layer (hexagonal grid), grouped by an attribute of the points. There are some solutions on here (Python console, SQL virtual layer) but I can't seem to get ...
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2
votes
0
answers
31
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Convert a raster to show count of cells of a given relationship to each cell
Is there a tool (QGIS preferably), that will look at every raster cell, and compare it to neighbouring (1km) cells and populate the value with a value based on relationship.
Example (and indeed the ...
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1
vote
1
answer
230
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How to get rolling count of masked pixels in Google Earth Engine
Using the Global Forecast System from NOAA, which provides relative humidity (RH) estimates several hours in to the future (up to 16 days to be exact). I create a binary of the RH, call it leaf ...
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3
votes
1
answer
284
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Counting and summing selected number of features in map layer using PyQGIS
I have a map layer and I want to find out how many of one type of feature there are, and sum an associated feature. I want to do this as a plugin script as there will be a number of other operations ...
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votes
2
answers
912
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ArcPy command to get the number of features in map layer
I am looking for an ArcPy command to get the number of features in map layer.
There are posts on how to check the number of features in the source of the map layer with
arcpy.GetCount_management(lyr....
- 1
5
votes
2
answers
224
views
Counting number of points in one layer within fixed distance to points in another layer in QGIS
In QGIS 3.22.7 I want to count the number of points on point 'layer B' within 60m of each point on point 'layer A' and add a column to the data on point 'layer A'. What is wrong with the following ...
0
votes
0
answers
126
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QGIS count points in polygon by category
This question is following to this answer point count in polygon by category
array_length(overlay_intersects('pointlayername',$id,filter:="fieldcontainingcategory"='nameofcategory'))
This ...
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votes
1
answer
222
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QGIS count points in polygon geometry generator
This is a follow up question to this question.
I have in QGIS v3.22 two layers: polygon hex layer and points layer.
I want to count all the points that overlap with the polygon layer and display the ...
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0
votes
1
answer
408
views
Counting total number of records in layer using ArcGIS Pro
I have a point layer which has millions of points and I would like to know the total number of points in this layer.
How can I do this in ArcGIS Pro 3?
Usually, I just go to the attribute table and ...
- 1,184
6
votes
2
answers
461
views
Counting adjacent polygons using QGIS
Is there a way to count adjacent polygons using QGIS?
I want to create a new field with the number of adjacent polygons.
I want to count adjacent polygons to determine if a polygon (house) is a corner ...
4
votes
1
answer
1k
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What replaces refFunctions plugin's intersecting_geom_count function?
I have been away for quite a while and it is probably a couple of years since I used the atlas features. I upgraded to QGIS 3.24 and I have just tried to generate an atlas from a saved layout. That ...
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1
answer
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ArcGIS Online Arcade Count Features
I'm creating a dashboard using ArcGIS Experience Builder and I'm having trouble writing Arcade code to display the total number of assets with a condition equal to excellent.
I think I'm on the right ...
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2
votes
1
answer
422
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Counting in field calculator with several group_by- and filter-conditions
My question relates to a work-around that I assumed might work, instead of trying this: Count points per polygon, classify point count in original layer in QGIS as all counting attempts have either ...
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4
votes
3
answers
540
views
Count points per polygon, classify point count in original layer in QGIS
I have a question that I believe is similar to Count points in polygon grouping by attribute using PyQGIS but not really the same, as I would like to do it without PyQGIS and also have the information ...
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0
votes
0
answers
41
views
Creating variable that counts locations within buffer by monthly intervals using ArcGIS Pro
I am using ArcGIS Pro.
I have Sales locations and opening dates (and closing dates if applicable) for retailers in a state. I want to draw buffers and then count the number of other retail locations ...
0
votes
1
answer
458
views
Errors when counting data points in polygon
I am trying to count my datapoints inside different polygons, but it gives an error about my shapefile saying:
No spatial index exists for points layer, performance will be severely degraded
Feature (...
6
votes
2
answers
1k
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Counting points within certain distance of each other in QGIS
I have a shapefile right now that contains many points. I would like to count the number of point points that are within 150 ft of each other.
For example, I should count 8 locations with points ...
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1
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246
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Select points by number of unique values by group - ArcGIS Pro
Similar to this question,
I have two datasets that consist of points and polygons, where all the points are inside the polygons. The polygon IDs (called cluster IDs) were previously joined with the ...
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7
votes
3
answers
709
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Counting points that meet condition within polygons in QGIS
I want to create a dataset containing information about civilian deaths in areas near UNPKOs. Therefore, I use the Geo-PKO dataset, which geocodes UN peacekeeping missions, and the UCDP-ged dataset, ...
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