Questions tagged [point-in-polygon]
A common GIS operation. Used to determine whether a point lies within a polygon's bounds.
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Calculating mean value for points within polygon in QGIS
I have square polygons that follow the route of a boat. There is also a point layer with different measurements like salinity, temperature etc. Sometimes there is only 1 point inside the polygon, but ...
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Error when filtering spatial points dataframe: unable to find an inherited method for function ‘over’ for signature ‘"SpatialPointsDataFrame", "crs"’
I generated two spatial datasets: a SpatialPointsDataFrame and a polygon. The polygon should filter the SpatialPointsDataFrame, based on whether the points are in the polygon or not. However when I ...
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PostGis - Split polygon into two based in point
How I split this single polygon into two polygons based on the point where there is an intersection?
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Random Points in polygon not created
I have a polygon shapefile with a single object and I want to create random points in it. The tool 'random points in polygon' in QGIS does it job well for polygon 1, but doesn't create any points for ...
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ArcGIS spatial joins: how many species are in an area as well as averaging enviro data (polygon+points)
I am trying to work out how many species are within certain boundaries (ie. states) as well as find the average of the environmental factors (like rainfall). I am using:
A map of Australia broken ...
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Finding points from shapefile (residing in GeoServer) that are inside a provided polygon
I am new to GeoServer and spatial data. I have a shapefile "shape-file-2" in geo server which is a collection of Points. I am trying to fetch all the points which are inside a provided ...
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QGIS. Combining points data on a map with attributes in polygons
I have a project where I'm trying to combine flood risk data to a list of postcode (/zipcode) data. The postcode data is a csv that contains each postcode's easting, northing, longitude, and latitude ...
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Creating set number of regularly spaced points inside of polygon in QGIS
My application for this would be for making maps with pre-established plot points for cruising a stand of timber, but I could see this being used for other applications.
I am a little surprised that ...
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Creating duplicate points as many times as it overlap with polygons in QGIS
Let's assume there two layers, see image below
a point layer 'random_points_test' with 10 features
a polygon layer 'test' with three features
I am trying to modify the number of features in the ...
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Points in Polygon extraction
I have a shapefile with MSK-16z2 crs and a las-file which crs can not be recornized by qgis, but attached to the las prj contains also MSK-16z2. I need to crop described lasfile by shapefile. I tried ...
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Looking for accurate point in polygon algorithm using WGS84
I'm looking for an accurate point in polygon algorithm using WGS84.
The problem:
Given the set of points that are the vertices of an arbitrary polygon drawn on the surface of the WGS84 reference ...
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Showing data from attribute table in legend in QGIS
I have multiple points with locations on a map and I want to calculate the exact number of points for a selected area.
I created a polygon and with Numbers of points on the polygon I created a new ...
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Automatically populating point layer with ID of polygon it intersects in QGIS
I am using QGIS 3 and trying to populate a column of a point file that has rare species data. One of the attributes is a Wetland "ID" column. If any of my rare species points are within a ...
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Skipping invalid geometries without fixing them in QGIS
In QGIS 3.16.14 I have a shapefile with multipolygons (flood risk map of the country) and another layer of points (buildings). I need to identify which of those points are inside those polygons and ...
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Number of points in polygon not equal in QGIS and Geopandas
I have polygons and points.
What I do is a very simple operation - count points in the polygon. Primary I am working in Python, however I use QGIS to check and visualize the results.
I have this code ...
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Selecting points inside of fishnet tile and adding its ID to points attribute table using ArcGIS Pro
Using ArcGIS Pro, I have uploaded a csv file containing GPS points and displayed it as XY Data. I have also created a polygon fishnet of 50x50 tiles.
What I want is, for each tile of the grid, I ...
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How to perform intersect or overlay_within functions using Python/PyQGIS to circumvent graphical modeler limitations? [closed]
This relates to Creating field with 1/0 values depending if point sits inside polygon in QGIS for which people provided excellent answers but unfortunately highlighted a current limitation of the ...
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Creating field with 1/0 values depending if point sits inside polygon in QGIS
I have a layer with a single polygon and a layer with multiple points. Some of the points are inside the polygon. How can I create/update a field with a value of 1 (true) or 0 (false) depending if a ...
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Joining attributes in CSV by location using QGIS
I have a shapefile which divides Africa in cells of 0.5x0.5 decimal degrees. This documents provides the longitude, latitude of the centroid of the cell and a unique identified of each cell.
On the ...
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Finding distance to points only outside of polygon in QGIS
I've tried using "Intersect" and "Join attribute by location" but these aren't achieving exactly what I'm after. I have a series of points inside and outside a polygon.
My aim is ...
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GeoPandas Spatial Join of Points and Polygons returns NaN after projecting
I have an Excel file with some points (https://www.bundesnetzagentur.de/SharedDocs/Downloads/DE/Sachgebiete/Energie/Unternehmen_Institutionen/E_Mobilitaet/Ladesaeulenregister.xlsx;jsessionid=...
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Updating field values if condition met, but leave the original values if condition not met in QGIS
I'm sure this is probably quite simple but I'm still learning the syntax for field calc expressions. I have a points layer with the field "Distance" that I want to update using my expression:...
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R method for retrieving Polygon from GeoPackage that contains point [closed]
I have a polygon feature class and a point location and need to retrieve the polygon in which the point occurs. The feature class is in a GeoPackage and I am limited to using R.
I can use any publicly ...
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Assigning point attribute to overlapping polygon in QGIS
Are there a way to assign the attributes of a point to a overlapping polygon?
I got the data as lines and points. The lines are making the polygons and the points are overlapping the created polygon ...
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Counting features of point layer that are laying within polygon layer using QGIS
I have a 'Layer 1' that represents geographical areas. And another 'Layer 2' contains some location-based information.
I want to count/aggregate the tweets per geographical using QGIS. For example, in ...
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Retrieving attribute field from polygon feature containing point feature in QGIS
I am trying to populate a point layer's field attribute with values from polygon features' attributes that contain point features.
The inverse is very simple:
aggregate(
layer:='point layer's name'...
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Applying labelling with obstacles in QGIS
I'm working with QGIS 3.16 Hannover and I'm quite confused with the option Features act as obstacles.
According to QGIS documentation (13. The Style Library » 13.3. Setting a label » 13.3.2.3.4.4. ...
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Generating random points in polygons to simulate population distribution
I have a spatialpolygondataframe that represents census tracts. I want to simulate different scenarios of population density or distribution to test a model. To do this, I want to generate random ...
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Calculating mean value of polygons based on attributes of point layer in QGIS
I am working with QGIS to compute the annual burned area of my study area in Chile. I have two different layers.
One polygon layer which is a 1km x 1km grid of my study area. The only information ...
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Visualizing points with different colours based on field from polygon layer in QGIS
I am aiming to create a map showing species location records as points. I need to make the points different colours based on land type which is a polygon layer. So I want my species points to be a ...
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Creating different numbers of random points inside polygons using PyQGIS
I am developing a plugin using PyQGIS and PyQt5. I am calling qgis:randompointsinsidepolygons, where I am trying to give field input at VALUE parameter. It will take a variable number of points for ...
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Counting points in polygon using separate attribute values in ArcGIS Pro
I am trying to determine the different land surface types within a set of polygons. To do this I converted my land surface type raster layer to points.
So now I have a polygon layer (hexbins across my ...
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VB.NET - Point in Polygon From KML file
I have a big number of Polygons extracted from a KML file. The polygons represents "blocks" on the Earth surface.
I can read the coordinates of the polygons and store their values, as well ...
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NULL values when using overlay_within function in Field Calculator
I have two layers, a point layer and a polygon layer ('Sektorplan'). The polygon layer attribute table has a "Sektor" column ('1','2', ...).
The Goal
I want to add a new column ("Sector&...
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Exporting points inside specific polygon to Excel spreadsheet using QGIS [duplicate]
I have two vector layers, one with points, and the other with catchment boundaries. This is showing where the points are in relation to catchment areas.
I want to be able to export a Excel file that ...
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Selecting and exporting points inside specific polygon using QGIS
I have a problem that is similar to Get Points in a selected polygon.
I have a polygon layer (with +200 features) that represents a road (subdivided by every 100m) and a point layer of a GPS survey ...
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Equal distribution of points to regional hubs in QGIS
I have approximately 1,600 points plotted on a layer in QGIS.
On another layer, I then have 8 regional hubs plotted.
I am trying to distribute the 1,600 points among the 8 hubs, based on which hub ...
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Buffering around all borders of EEZ regions in QGIS
I have a layer containing points (in yellow) and a layer containing the Exclusive economic zones of all countries (as polygons, its geometry is MultiPolygon). See the image below:
I would like to ...
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Labeling only subset of points inside polygons in QGIS
I would like to create a set of rule based label styles for a subset of points inside a particular polygon, with the ability to still quickly show/hide the labels using the button
The situation: I ...
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Counting points within polygon and extracting the data
I have been given a CSV file which contains the Longitude and Latitude data points for a number of mobiles that run our own internal app. The data includes the unique "ID" for the device ...
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Counting points in overlapping polygons using GeoPandas
I have converted a 200m x 200m point grid of Greater London into a multypolygon 500m radius buffer layer for each point in the grid. What this means is that I have over 100,000 overlapping polygons.
I ...
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Counting points within polygon by attribute using QGIS
I have one table ('TABLE A') with points of Data divided by Latitude, Longitude & Hour. On the other hand I have another table ('TABLE B') with County names.
How do I count points (from 'TABLE A') ...
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GeoPandas within() not returning any records
I'm trying to create a layer of all cities with 100km of the coast of Australia. The following is returning coastCities as an empty DataFrame.
I have performed the same operations in ArcGIS and it ...
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Counting points in non-overlapping parts of polygon-buffers
I am trying to perform some calculations on a polygons layer I have, but there is a bit of complexity to it. I have this polygons layer, and underneath that layer, I have a population count data layer ...
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Creating unique ID for features that are within polygons with unique IDs
I need to create and "ID" for items within a polygon that also takes into account the name of the polygon that the item is within, so what I need is something along the lines of: poly_X_Item ...
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Getting distance between two points within polygon in QGIS
In QGIS 3.10 I have two layers, first one is point layer and the second one is polygon layer.
Every two points (with same "ID") in my point layer overlay with a single polygon in polygon ...
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Calculating the percentage of different polygon/point layers inside of my main parcel Polygon
I am using Arcgis PRO for academic research. My problem is about counting and getting the percentage of different point/or polygon layers within the main polygon layer.
I have 7 different polygon ...
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Counting points in polygon and printing out each placing
Here is my sample table for further description:
I have a original point layer:
ID
Name
X(latitude)
Y(longtitude)
ID1
Dog
A
1
ID2
Cat
A
1
ID3
Bird
B
1
ID4
Cat
A
2
ID5
Cat
B
1
ID6
Dog
A
1
Those ...
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How increase speed of counting CQL.toFilter("CONTAINS(the_geom, POINT (lat lon))") on GeoTools with Java
How can I increase speed of counting?
I want to select points which is included by shape (GIS shapefile .shp).
I have 5 million points and 10 shape files.
qry="CONTAINS(the_geom, POINT (69....
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ArcGIS Pro count points from multiple features within polygon
I'm using ArcGIS Pro v2.8.
I've created a Google Maps map, covering an area of farm land with different fields.
Next, I created separate polygons to cover each field.
I then created an X Y layer, ...
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