Questions tagged [point]
A geometric element defined by a pair of x,y coordinates.
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Select only one point in polygon using QGIS
I have a buffer shapefile and point shape file.
How can I select only one point in each buffer in QGIS?
If I use Select by Location, I will get all points inside the polygons, however I need only one? ...
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ArcGIS: Sort points from 2 different feature classes based on an ordered sequence [duplicate]
There is a series of 2 point feature classes that were merged and I want to generate a single continuous line feature class from each of them iteratively, with the points being connected by the ...
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GPS distortion correction and coordinate adjustment
I was making a survey test and moving with a boat that was equipped with two different GPS systems. The position was recorded every 0.5 m.
When I was evaluating the data I saw that from time to time ...
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Finding the overlapping points frequency table [closed]
I have a point feature class in ArcGIS that represents the registration location of each car. I need to find the frequency of cars at each Lat/Lon and create an output table which has three columns of ...
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Finding distance between two different point layers in QGIS
I have a large postcode dataset of ~1.6 million observations in 'Layer A'.
I have a smaller dataset of ~5000 observations in 'Layer B'.
'Layer A' contains an "ID" that matches postcodes with ...
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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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Polyline endpoint query layer in ArcGIS Pro
I have an Oracle 18c/SDE.ST_GEOMETRY polyline FC (15,000 features).
I want to create a query layer (or db view) that will display the startpoints and endpoints of the lines in ArcGIS Pro.
Is there a ...
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Reorient points to certain degree [closed]
I have these pictures below that have different thicknesses:
Green Points = design for the river area,
Blue Points = I generated from Pixels to Points,
Pink Points = from the Blue points but rotated ...
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Nearest distance between point and line layers in QGIS
I have two layers, a line and a point layer.
I need to make a line layer which connects all the points to the nearest line feature. How can I do that?
Is there a plugin available for QGIS?
This is a ...
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Plot points around defined centroid using degrees and distance in QGIS
I have a shapefile plot_center of plot centroid points (like picture below) and then I have a Excel table with trees which corresponds to plot centroid points by common field ID.
The excel table ...
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Creating Minimum Convex polygon around points in QGIS
I just downloaded QGIS 3.0.2 and trying to create a minimum convex polygon around points using the "Minimum bounding geometry" (convex hull).
The videos and help documents I see online ...
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Selecting points which touch "boundaries" of another polygon using QGIS
I have an quite complicated polygon shapefile and a lot buffers around points (second shapefile).
These small polygons are within and outside of the big polygon. I need to select those polygons which ...
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Color gradient in Point layer, based on attribute
I have a collection of points[nr, x, y, z] with elevation z added to the map like this:
...
for i in range(len(points)):
seg.setGeometry(QgsGeometry.fromPointXY(QgsPointXY(points[i][1], points[i][...
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Adding break/vertex on a polyline from points
I have a polyline which consists of just one geometry. I have points which are evenly spaced (25m). How would I add these point vertices to the line so that the points will create one line segment/...
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Aggregate points inside polygons
I have a project that I am required to aggregate points inside polygons that have a common value.
Basically having QGIS to create a buffer around those points.
The dark green arrows have a unique ...
CommunityBot
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QgsPoint invalid argumets in PyQGIS 3
I get an error:
"Invalid type in constructor arguments."
for a QgsPoint in QGIS 3.
I was fine in QGIS 2, it never gets to print D
for steps in range(numVertices):
vertex = geom....
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Creating polygons from points in Carto
Using Carto, I am trying to create shapefiles of regions using points(Link to Dataset in Carto ) with a shared column value to group by. I've included 3 photographs. 1st photograph of the points ...
CommunityBot
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Looking for Python equivalent of QGIS "Nearest Neighbour analysis" tool
I've been using QGIS "Nearest Neighbour analysis" tool to find out the following information about my point shapefile
Observed mean distance
Expected mean distance
Nearest neighbour index
...
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Way to determine cell size of a shapefile
I am using the Point to Raster tool in ArcGIS Pro to turn my shapefile in to a raster.
The automatic cell size used (pre-defined by ArcGIS Pro) is 8.1m - this gives me a low resolution output.
With ...
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How to make point symbols also have the number labeled inside the point?
I am trying to make a map where I have different colors for different categories of business type (retail, service, etc.), they are points on the map, but I need the point symbols to have the ID ...
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Creating CSV with lat/long from point shapefile using Python [duplicate]
Does anyone know how to create a CSV containing lat and long fields from a point shapefile in Python? I can only find info on how to make a shapefile from CSV with lat/long and not the other way ...
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Calculating point angle in QGIS [duplicate]
I was wondering if there is a plugin, or a field calculation in QGIS to calculate a points rotation angle. ETGeoWizards has a tool that allows you to calculate a point layer rotation angle from a ...
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Extracting polygon features based on single layer attribute polygons using ArcGIS Pro [closed]
I have a single-point shapefile with gauging locations all around the world, and I also have a shapefile with country boundaries.
See picture of files.
How can I extract the point files that are ...
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QGIS is not showing/rendering points that are present in MySQL server
I have a MySQL database in which there are auto generated points almost 1000 created via Laravel (PHP framework) it has a very simple schema as shown below. I just want to visualise them on an ...
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What causes the QField error message 'unable to save'?
I cannot seem to find any information about this particular error message.
When trying to add a point feature in QGIS, I receive the message 'Unable to save' (see screenshot). I have tried to find ...
CommunityBot
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Adding in points based on description no GPS data using ArcGIS Pro
I am working on a project that has a mix of points where half have specific GPS data and the other half only have descriptions of where the points are. I have added in and moved the GPS points to the ...
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Generating Points Along Lines not starting at the start of my line feature
I am trying to generate chainage points in 50m intervals on a road system including the start and end of the line. Each road is its own single continuous line and while attempting to solve my issue, I ...
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Point feature symbol not showing in ArcGIS Online but renders fine in ArcGIS Pro
I've published a map layer of point features with several basic symbols for unique values. One layer that I published a couple years ago is displaying correctly, but a new layer that's almost the same ...
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Creating a point pattern (ppp) error using SpatStat in R: "Only projected coordinates may be converted to spatstat class objects"
I have a point dataset, and I am taked with filtering out duplicate coordinates, removing all points that are outside of a specified county shapefile, and then creating a ppp points object. However, ...
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Convert vector points to raster using minimum method in Python
I have a large dataset containing over 10 million vector points
I am looking for a way to create a clear and accurate raster in Python by converting the vector points to a raster using the Minimum ...
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Points in lines extraction of coordinates automate
I'm currently working on a project with ArcMap.
I'm having a problem on how to extract the x,y info of all the points in a line, meter by meter.
This is the problem & objective:
So I have 1 line, ...
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FME GeometryReplacer, WKT Error
I am trying to load POINT WKT Geometry from MS SQL Server, it is in WKT Format. Using the GeometryReplacer, I am receiving an Error, and everything looks right as far as I can see, it continues to ...
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I cannot use Point entry into Graphical Modeler in QGIS
I would like to use a Point entry to get the point coordinates in the map to add in the network analysis as a start point.
I have added the Point entry into Graphical Modeler, I can click on the map ...
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Plotting points over raster pixel positions, rather than geographic coordinates in QGIS
I've been doing some image processing in OpenCV. I have a numpy array which has x1,y1 and x2,y2 coordinates as raster cell positions (so not spatially referenced). I need these coordinates marked off ...
CommunityBot
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Select subset that is spatially equally distributed
Let's say I have a table point with ~10.000 rows. Each row contains a POINT(x, y).
I also have a table polygon with POLYGONS(...).
The points in the point table are unequally distributed in space. ...
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Find all closest points to unique point in PostGIS
I have two tables valid_collisions (POINT) and intrct_pts (POINT)
I want to create a new table using a nearest-neighbor type of query to find aggregate values from my valid_collisions. In essence I am ...
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Number of points within x min walking distance in QGIS
In QGIS I have a layer of points each one representing a household with its (x, y) coordinates and a population assigned to them. I'd like to calculate the points that are accessible from each point ...
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Import bulk geotagged images stored in web drive using table and convert this link into points
In the Excel sheet added. one column includes rows of links to geotagged images stored in webdrive. Is it possible to import from these links and convert it into point polygons?
When the points are ...
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MSSQL performance with Geography (point within polygon)
I have a query, below, that works - however its very slow, looping through roughly 24,000 points per second. This is a rather high end production DB server with MSSQL and SDE, and in other instances a ...
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Point features do not emerge after applying st_intersection on two line features
The aim is to create a point at each intersection of roads via st_intersection. Before applying the function st_intersection, I dissolve the line features based on the road number (via ref). The ...
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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 ...
CommunityBot
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Displaying only part of points in QGIS
I have a vector layer with ~30M points, which is why the layer is displayed for a very long time. And I'm not talking about further work with him yet.
Is it possible in QGIS to display only a part of ...
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Does the QGIS Georeferencer have a point prediction function?
When taking GCP using Georeferencing in QGIS,
Is there a point prediction function?
For example, when working on GCP in an ERDAS program, put reference coordinates (ex: 10 coordinates)
After taking ...
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Rotating point layer according to line layer in QGIS
I got two layers: (1) a line layer with water pipelines and (2) a point layer that shows hydrants and so forth. The points are located, mostly, on the line layer.
For the symbology of the hydrants i ...
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Combining polygons based on distance matrix in QGIS
I have the following layers in QGIS:
a polygon layer made up of all the zip-code areas in Germany
a layer displaying all the electricity grid nodes in the country.
In a previous step, I created a ...
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Deriving touch points layer of line-polygon intersection in QGIS or PostGIS?
Assume you have polygon and a line that goes though this polygon.
Now I would like to create a separate layer which stores the point geometries of where the line intersects the outline of the polygon, ...
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Merging SpatialPointsDataFrame to SpatialPolygonsDataFrame in R
I am trying to perform a spatial join between SpatialPointsDataFrame and SpatialPolygonsDataFrame.
I have two sets of data named California_shp and Houses. Their information is as follow:
dput(head(...
CommunityBot
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Using Point input for other algorithm in QGIS Graphical Modeler
I added a Model Input "Point Input" to my model. If I now launch the model from the Processing toolbox the user can click the ... icon and click on a point on the map.
How can I use the ...
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QGIS Assign point data to a line layer considering line direction
I have a line layer representing a river bank. The river bank is divided in numerous separate line features representing zones, each separate line has many vertices. The lines have a set direction.
I ...
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Creating a Point with SRID - MariaDB
I have a table containing a longitude and latitude (as doubles) in MariaDB. What I'm trying to do is create a point with a specific SRID - 4326. The current way that I create a point is by using the ...
