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Questions tagged [point]

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

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0 votes
1 answer
38 views

QGIS point sampling misses data on edge of raster (possible bug?)

It seems I may have discovered a shortcoming in the way QGIS handles raster sampling in points. Since yesterday evening (18/7), one small issue has begun to elude me (during my comeback geofictional ...
0 votes
1 answer
32 views

Putting points on map using ArcGIS Pro

I am trying to create a map that shows a shaded region and a bunch of labeled dots of landmarks in the area. For example, I want to have a map of New York City with Manhattan shaded and then a dot ...
6 votes
2 answers
1k views

Creating specific amount of points along line in QGIS

I would like to create a specific amount of points along a line in QGIS. The lines are in different lengths, but I want them with a maximum of 50 points (divide by 50). The tools i've found in QGIS ...
2 votes
1 answer
97 views

Moving features of different geometries at the same time in QGIS

In QGIS 3.34 I would like to move a point feature and a polygon feature at the same time. The polygon is a round buffer around a point. I am only able to edit the point and polygon one after the other....
1 vote
1 answer
2k views

Adding and filling GEOMETRY column in new spatialite

I have three tables. One has no geometry. The second is POINT type, and shows up correctly on the map. The third is, for the moment, a simple checker table, don't worry about it. I am able to perform ...
0 votes
0 answers
22 views

Point features not rotating when map view is rotated using QGIS

I have a point layer in QGIS with features sorted after a specified value. Meaning, my features are categorized and are symbol layers of type "Font Marker". Now, since they are street labels ...
0 votes
0 answers
12 views

Create a trendline variable

i'm looking for create a variable with the linear fit data, so i can add to the map layer the new raster map with this band (variable), do you know how to do this? i want to create a raster where ...
3 votes
2 answers
4k views

Creating path between many points in Google Earth

Is there any specific way to convert approximately 25000 points in Google Earth Pro to paths or draw paths between points automatically? Since I want to obtain their altitude data, I need it to be a ...
0 votes
0 answers
19 views

deck.gl GeoJSON point layer not extruding

I have a GeoJSON layer in deck.gl which I'm trying to extrude based on the elevation property. E.g. { "type": "Feature", "geometry": { ...
0 votes
1 answer
725 views

Extract Points by Attribute for each Intersecting Polygon in ArcGIS Pro

I have a points shapefile and a polygon shapefile, each with millions of features. All points lie spatially within polygons so that there is one or more points within each polygon. The points have an ...
2 votes
1 answer
498 views

Create multiple callout lines from a single label

I would like to label groups of points (clusters) with only one label but several call-out lines. I built on top of the very appealing answer from @eurojam here: Giving one label to two points using ...
1 vote
1 answer
107 views

Assigning unique ID to new points in QGIS

I want to add a new field to my feature attribute table. In this field, I want to generate a random ID (just a number, like 1, 2, 3, etc.) for every new and existing point I create on the map. This is ...
1 vote
1 answer
411 views

Sample points from each feature in a featurecollection (Google Earth Engine)

I created a grid (featurecollection containing various rectangular features) by coveringGrid function, and now I want to sample 10 points within a feature, and for every feature in this ...
2 votes
1 answer
36 views

Missing points datasets global monitor energy

I want to use the GEM data from Global Monitor Energy and incorporate it into QGIS. I downloaded the Excel data which I converted to CSV. Then, I wanted to add the layer thus created with the "...
1 vote
2 answers
62 views

Displaying two elements in the same coordinate in QGIS [duplicate]

In QGIS I have two elements in the same coordinate and I believe the software is recognizing them as only one point. Is there a way for me to visually display in the map the presence of more than one ...
2 votes
1 answer
2k views

Using spatial points to extract values from large raster in R

I am working with location data for 22 different individuals (id). The data contains an id column, and coordinates (UTM_x and UTM_y). For all individuals combined, there is a total of 991,099 ...
1 vote
1 answer
171 views

Autogenerating waypoints to GPX file with QGIS to find coordinates along route

Edit: I was able to figure out how to get the waypoints, I now need help with getting the coordinates for those waypoints in a CSV or JSON format. I am trying to get geo coordinates for every 0.1 km ...
5 votes
5 answers
7k views

Extract highest point in raster and convert to point vector

I have a raster DEM and I want to extract from it the highest point found in every polygon of a polygon shapefile. The result that I would like to obtain would be a point shapefile with 2 collumns: ...
3 votes
1 answer
1k views

Drawing polyline with user input points in QGIS using Python

I have an empty layer in QGIS in that i just want to draw a polyline by selecting points on layer using Python. For example, if I select a start point and endpoint on a layer, I want to draw a line ...
1 vote
1 answer
47 views

QGIS using Geometry Generator to connect multiple points within a layer separately

I have a CSV layer containing roughly 50,000 individual point vectors of vessel tracking data. The attribute columns are date/time, latitude, longitude, vessel ID and vessel name. Some vessels have ...
3 votes
3 answers
195 views

Aligning surveyed point layers in QGIS

I’m wondering if QGIS has a tool to align the lat, long, and alt data of two point layers based on a common point. I have data like this: Survey 1 points: A B C Survey 2 points: C D E I’d like to ...
0 votes
1 answer
28 views

How do I name points on a shapefile layer?

I have a shapefile layer with a bunch of points placed on a map. I would like to name each point "R01" "R02" and so on. I know how to give each point a numerical value that I can ...
1 vote
1 answer
45 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 ...
1 vote
1 answer
25 views

Why do my markers not show on my tmap, using two different data frames?

I have a data frame that plots the urban area units from the Timaru District, New Zealand. To give you some idea of the size of the map, this is the Wiki page on Timaru showing geographical location ...
0 votes
1 answer
42 views

How to find a specific distance upstream from a point

I am trying to find a simple way to map sections of a river which are covered by a Mink trap. So I have a river layer and a points layer for where the traps are placed. I want to select all rivers (...
1 vote
1 answer
51 views

QGIS DEM to elevation Points, pixels not centred

I have a DEM which I'm trying to convert into a point layer in QGIS. I used the raster pixels to points tool, which seemed to work, except that the points are not in the centre of the DEM pixels. They ...
1 vote
1 answer
451 views

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 ...
2 votes
1 answer
184 views

"Unable to execute algorithm Could not load source layer for INPUT: invalid value" when calculating shortest path using two network layers in PyQGIS

Using PyQGIS I can calculate the shortest path from point to point. But I need to calculate the shortest path based on two network layers: A and B. So that the result should be the shortest path from ...
1 vote
1 answer
428 views

Finding node on polyline immediately after given point using Turf

I have 2 polylines, A and B. My objective is to Find closest point on B from a given node on A Find tangent on that point So I use function nearestPointOnLine to find point on B closest to a node on ...
3 votes
3 answers
188 views

Auto populating attribute table with lat and lon in QGIS

Is there a simple way (without writing script or Python skills) to auto-calculate and auto-populate "lat" and "lon" attributes in QGIS? When I manually add new points or move ...
2 votes
1 answer
99 views

Creating tangential lines at points along shoreline in QGIS

I want to create tangential lines for each point along a shoreline in QGIS, such as the dashed line I've hand-drawn. These points are not randomly spaced, they each represent the angle at which each ...
0 votes
0 answers
14 views

Clip NetCDF data by point shapefile in Python [duplicate]

I have .nc files containing global chl-a data. I want to clip these files using a point shapefile and get the chl-a values specifically for those points. However, every similar code that I have come ...
1 vote
0 answers
48 views

Synchronizing point layer with external table in QGIS

In QGIS I have an external table imported from MySQL where several users insert data through a website. This table is imported into QGIS and I have a join with a geopack that contains the x and ...
0 votes
1 answer
32 views

Display point labels alternatively to left and right

I am working in QGIS and I have a point layer whose labels are to be displayed left or right of the point. The formula I tried to make it work is, in label placement, selected Offset from Point mode, ...
31 votes
8 answers
13k views

Calculating intersection of two Circles

I'm trying to figure out how to mathematically derive the common points of two intersecting circles on earth's surface given a center Lat/Lon and a radius for each point. For example, given: Lat/Lon ...
1 vote
0 answers
39 views

Control feature order or z-index for WebGL layer icons? (OpenLayers)

I want to control the order icons appear on a WebGL layer so icons in the north appear in the back and overlap to the front as they appear southwards. Since the WebGL layer does not have a renderOrder ...
2 votes
2 answers
421 views

Exporting X,Y coordinates relative to reference point with QGIS

I have a number of points (grey points in attached picture) around a reference point (red point in picture). I need to export X,Y data corresponding to the horizontal and vertical distance in meters ...
4 votes
4 answers
230 views

Dropping nearly-identical point locations with GeoPandas

I have a GeoDataFrame (gdf) of several thousand point locations. I want to drop duplicate records from the gdf - that is, records with the same attribute information and the same location. However, ...
0 votes
0 answers
48 views

How to draw KML LineString with icons at each point

I'm trying to figure out how to draw a line in KML with some sort of indicators at each point in the line. For an overly simplified example, say someone is hiking and they periodically record their ...
11 votes
5 answers
38k views

City shapefile for free

I am looking for a simple point shapefile which indicates where the cities of the world are. I cannot seem to find one which is free of charge and meets my requirements. Ive got this one: http://...
0 votes
1 answer
233 views

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 ...
58 votes
8 answers
170k views

Getting list of coordinates for points in layer using QGIS?

I've got a layer in QGIS that is comprised of points. Its attribute table doesn't have (show) the corresponding x and y coordinates for each point. Is there a way for me to extract a list of ...
0 votes
1 answer
65 views

QGIS - plot points based on user defined origin

I've been given a CSV containing X and Y points (as seen below). However, these are in metres from the origin in which the person has self-specified. For example, in EPSG:4326 I may want to specify ...
27 votes
6 answers
43k views

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 ...
1 vote
1 answer
127 views

How to apply style array to WebGL points layer (OpenLayers)

How can I apply an array of styles to a WebGL Points layer in OpenLayers? For example, if I use the following code to apply a circle and an icon, only the icon is visible - so is what I want to do ...
3 votes
1 answer
6k views

Adding easting and northing points in ArcGIS

I am trying to add coordinates into ArcGIS 10.6.1. Below are the Northing and Easting I have been given. I have added these Northing and Eastings into an Excel sheet and saved them as a CSV File (The ...
13 votes
4 answers
16k views

Splitting line layer using another point layer in QGIS

How to split a line layer using another point layer in QGIS? I have one point layer and one line layer. I want to split the line layer between two points (those two points belongs to point layer) ...
1 vote
1 answer
895 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 ...
0 votes
1 answer
2k views

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 ...
1 vote
1 answer
196 views

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 ...

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