Questions tagged [point]

A geometric element defined by a pair of x,y coordinates.

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6 answers
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Selecting only one point in polygon using QGIS

I have two shapefiles: polygon(buffer) and point. How can I select only one point in each buffer in QGIS? If I use the "Select by Location", I will get all points inside the polygons, ...
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  • 531
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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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2 votes
3 answers
71 views

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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  • 531
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1 answer
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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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3 votes
2 answers
176 views

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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1 vote
0 answers
45 views

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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  • 336
4 votes
1 answer
64 views

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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  • 89
3 votes
2 answers
172 views

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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59 views

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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0 votes
0 answers
25 views

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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3 votes
2 answers
338 views

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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0 votes
1 answer
45 views

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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  • 307
1 vote
1 answer
19 views

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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2 votes
0 answers
51 views

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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  • 21
1 vote
1 answer
191 views

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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1 vote
0 answers
73 views

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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0 votes
0 answers
20 views

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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2 votes
2 answers
72 views

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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  • 475
4 votes
0 answers
80 views

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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16 views

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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0 votes
1 answer
60 views

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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4 votes
1 answer
115 views

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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  • 43
2 votes
1 answer
228 views

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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1 vote
0 answers
30 views

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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  • 447
2 votes
1 answer
56 views

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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  • 21
2 votes
0 answers
48 views

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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  • 51
4 votes
1 answer
148 views

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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  • 455
3 votes
1 answer
85 views

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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  • 8,554
1 vote
0 answers
76 views

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 ...
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0 votes
0 answers
26 views

Point vs multipoints when creating a view it automatically decided to go to multi

I have a table with unique points, when creating a view it automatically decided to convert this geom to multipoints, so to do that it stores a second point with same details just varying the ...
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2 votes
1 answer
57 views

Move points to a Z-value?

I want to export a 800k points, which correspond to a DEM (terrain elevation) to Rhino. Currently, I tried to export a CSV with X,Y,Z coordinates based on the point attributes, however, there seems to ...
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  • 361
2 votes
1 answer
85 views

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 ...
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  • 21
6 votes
1 answer
73 views

QGIS point layer: Select first point in each category

I have a point shapefile layer with several thousand points. Each record has a timestamp field and another field which defines a category to which that record belongs. There are about 200 different ...
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  • 393
4 votes
2 answers
248 views

Calculate Distance (in miles) from Point to Polygon Edge in QGIS

I am attempting to calculate the distance from a point to the nearest polygon edge (county boundary). I have approximately 80 points and want to find the closest county edge for all of the points and ...
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  • 49
1 vote
0 answers
46 views

Group points based on proximity and equity using QGIS

I would like to group students based on the nearest school, but also having mixed social categories within the group of students. I have x,y coordinates for the students and the shcool. Each student ...
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1 vote
0 answers
33 views

Capturing accurate polygons from field data

Drawing out a new polygon with snapping enabled to closely follow the vertices of the track line that I have seems to work, but I get the impression that the track itself has far more information that ...
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2 votes
1 answer
270 views

Adding a new column to featurecollection in Google Earth Engine

I want to add random values to a new property column landcover in the feature collection, but it only yields one value for all feature/points. It should be random values for each feature. Here is my ...
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  • 171
3 votes
1 answer
51 views

Calculating region pair distances along network in QGIS 3.22.4

I'm currently attempting to calculate the distances between several thousand region pairs (centroids) along the Roman road network in QGIS. I want to achieve something similar to the "Shortest ...
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  • 51
4 votes
1 answer
132 views

Difference between control point, reference point, and tie point

I georeferenced a map using grid coordinate and road network shapefile (e.g. intersection vertex) as a control point. I didn't acquire a control point through the survey. so I use "control point (...
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  • 95
4 votes
1 answer
92 views

Snap points to polygons based on attribute QGIS

I'd like to snap the points to the closest polygon (blocks) based on an attribute they share, this attribute is their suburb. I've tried by running the following expression: closest_point( ...
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  • 71
2 votes
2 answers
82 views

Disperse points with the same coordinates within a certain radius using PostGIS

I had located on my table I have sets of points sharing the same coordinates and they are clustering, is there a way to regenerate their geoms so they get dispersed or redistributed within a certain ...
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2 votes
0 answers
35 views

Snap points based on attribute QGIS

I'd like to snap the blue points to the nearest yellow point based on an attribute they share on QGIS, this attribute is their suburb, I've tried by using the tool "geometry by expression" ...
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  • 71
1 vote
1 answer
320 views

Replace MultiPoint, GeometryCollection & LineString geometries in shapefile with Point geometries [closed]

I have a geopandas dataframe that contains shapely MultiPoint, LineString, GeometryCollection and Point geometries. Cannot save the the geopandas because of this neither perform other operations (...
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  • 151
5 votes
2 answers
183 views

Matching colour of point to colour of polygon based on shared attribute using QGIS

I am setting a query on the symbology in QGIS. I have a layer of point locations (586 points which show the location that data has been collected) and I have a layer of polygon areas (576 polygons the ...
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4 votes
1 answer
135 views

Spatial adjustment using control points in QGIS

I want to spatial adjust a bunch of points using control points. I have two layers. One is the layer I want to move with the control points in it, and another is the layer with target points pairing ...
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0 votes
1 answer
23 views

QGIS : Z value from Exported Data (NOAA)

I open the ENC Direct data (any file) (https://www.charts.noaa.gov/ENCs/ENCs.shtml) in Arcmap using Esris' free S-57 loader extension and I'm able to see the SOUNDG_P layer and can display the Depth. ...
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  • 103
0 votes
0 answers
20 views

Geographic coordinate system of Spectrum Geocoder

I am working with a list of locations that have Spectrum Standardized Long and Lat coordinates. I have always specified a coordinate system when mapping XY coordinates, but for geocoder outputs like ...
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1 vote
0 answers
24 views

Evenly distribute some points in different polygons (blocks)

I need to evenly distribute some points in different polygons (blocks) that I have within a study area in QGIS. Does anyone know any tool or way to do it?
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  • 71
4 votes
0 answers
44 views

Making weight heatmap on recurring event in points layer using QGIS

I have a heatmap created on a points layer of deer-vehicle collision. Now, I want to weight the heatmap on the recurring of crash in the same area in different years. I would give weight 0 if a point ...
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  • 41
0 votes
1 answer
66 views

Move existing point to a new location

I have a point shapefile that I have updated the Location for. Attribute for {Existing_Lat}, {Existing_Long} and {Lidar_Lat}, {Lidar_Long}, 4 Fields. I need to move the point from the existing Lat/...
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