Questions tagged [point]

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

Filter by
Sorted by
Tagged with
1 vote
1 answer
106 views

Using coordinates from mouse click for QgsPointXY when creating point using PyQGIS

I can not figure out how to input the coordinates through a mouse click instead of the code below. I am trying to create a temporary layer of a point from a mouse click. Everything seems to work ...
user avatar
  • 33
2 votes
1 answer
60 views

Only retaining polygons that would intersect with a point but not taking point data

I want to see if a polygon contains a point data of interest (in this case an observation of grain yield), but I really don't care about the point data (grain yield), I just want the polygons that ...
user avatar
2 votes
0 answers
26 views

How to get equal size cells when using rasterize in QGIS on slanted points

I'm trying to get nice, centered cells on every point. I'm using the tool rasterize in QGIS. I have gotten the method to work with uniform point data, however, I am having more trouble with slanted ...
user avatar
0 votes
0 answers
57 views

Converting a .MIF file into .TAB retaining symbology of point features in QGIS

How to convert in QGIS a layer from MapInfo .MIF format to .TAB without loosing symbology? QGIS can't save symbology of point features when exporting a layer to .TAB format. (It can save symbology of ...
user avatar
  • 186
2 votes
0 answers
24 views

Unable to load CSV as viewable features

Have tried loading a .CSV using Delimited Text tool. When it Loads up, it only loads as an attribute table with no spatial view. What am I doing wrong?
user avatar
  • 21
3 votes
1 answer
129 views

How to create 3×3 pixel from one point in QGIS

I need 135 raster values of raster from 15 points. So, I want 3×3 pixels (9 raster values) from each point. To make them, I tried "Rasterize" to convert points as shown below. (In this ...
user avatar
  • 33
2 votes
1 answer
101 views

Extract Max or Min Value from Point File Attribute and then Add XY Coordinate

I have created a Point dataset by using the Saga routine 'Convert Lines to Points'. This produces the following look and attribute table: Can anyone advise on how I can extract the maximum value from ...
user avatar
  • 71
1 vote
0 answers
26 views

Shifting points in shapefile based on velocity and direction in raster layer using ArcGIS Pro

I have a point shapefile and I need to shift each point based on the velocity and direction of the raster cell of a corresponding shapefile. I cannot seem to find a tool in ArcGIS Pro that would ...
user avatar
1 vote
1 answer
107 views

Find item from start point and end point of line

I'm working on a project that wants me to find the names of items at the start and end of a line. I have a point at each end of a line, these points all have a name. I would like to get the name of ...
user avatar
  • 101
4 votes
2 answers
156 views

Drawing line between two points from another CSV in QGIS [closed]

I have two large CSV files, one that defines the location of each point as: point lat lon attribute 1 And another that has data on what lines exist between them point A point B attribute 2 ...
user avatar
  • 49
1 vote
1 answer
24 views

Check that a point is at the end of a line using Data Reviewer

I am attempting to verify that points are at the ends of lines using Data Reviewer in Arcgis 10.8. So far the closest thing I have found is using Valency, but Valency only checks lines connectivity to ...
user avatar
0 votes
0 answers
44 views

GeoServer CSS - change size dynamically

I have set point style with three different size, based on three different scale. Is there any way to set one size and this one will increase or decrease automatically according with the scale (like ...
user avatar
  • 11
2 votes
1 answer
39 views

View object on layer B only when specific object if visible in layer A

I have a layer "A" with lines and a layer "B" with points. I have within layer B a field telling for each point to which line it is connected (layer A lines ID). When I hide some ...
user avatar
  • 833
1 vote
1 answer
135 views

Extracting points as KML/KMZ from web map

This is the link: https://www.hopenvios.com.ar/. I would like to have the map with all points, does anyone know if it is possible?
user avatar
3 votes
2 answers
70 views

Clustering vectorpoints

I created a layer of vector points out of a raster. The raster was a .png, where I extracted all the pixels with the value 1. Initially, it was a Paper, where I marked points with a pen. Now I am ...
user avatar
  • 55
1 vote
2 answers
165 views

Layer to KML using ArcGIS Pro doesn't show all points [closed]

I'm using ArcGIS Pro, and I am trying to convert a group of layer (both points) to KML. When I make the KML and open it it doesn't show all the points!
user avatar
  • 11
0 votes
0 answers
91 views

Global Mapper - What are the Specific Steps for Generating a Grid of points inside a Polygon

Using Global Mapper 17, what are the precise steps for creating a point grid with regular rows and columns that fill an entire irregular polygon? Each polygon encloses a landform of interest and I am ...
user avatar
1 vote
1 answer
195 views

FME - Measure length of line to any point along line

Do you know how can I measure distance from the beginning of line to point. Points are on lines. I tried some solution and think about measuregenerator, lengthtopointcalculator, neighborfinder... but ...
user avatar
  • 11
6 votes
1 answer
112 views

QGIS expression not working as expected: selecting nearest neighboring points of a selected point

The problem In QGIS 3.20.0 (Win 10), I have an expression that does not work as expected and I don't understand why. On a point layer, one point is selected. When using Select by expression, the ...
user avatar
  • 42k
5 votes
1 answer
127 views

Marking point with the single extreme value in QGIS

I am working on a system with a continuously updating database of earthquakes. For one of the presentation, I want a map showing the last events. I have the timestamp for each event, so I have made a ...
user avatar
  • 3,117
5 votes
3 answers
718 views

Selecting the number of nearest points in QGIS

I have loaded a CSV file (includes points with elevation) in QGIS. I want to select exactly 1000 points in a specific area. My idea is to select one point and then to include all nearest points to him ...
user avatar
1 vote
1 answer
95 views

Producing raster that shows decay of weighted points

I have a points layer representing the locations of urban green spaces, each containing an associated cooling intensity value and decay coefficient in the attribute table. I want to show the decay of ...
user avatar
2 votes
1 answer
75 views

Weighted mean in attribute union with QGIS

I have joined Argentina's census data wich has small area divisions, with electoral disctrict data wich has a bigger area than those of the census. In QGIS, I've calculated centroids for the census ...
user avatar
0 votes
0 answers
32 views

Random-points-from-Classification tool (EnMAP-Box plugin) - Adding mask option by python? (QGIS 3.16, Win10)

I created random-point-vector-files from a classified rasters with a given number of points per class by the Random points from Classification tool (EnMAP-Box plugin). But, now I'd like to exclude ...
user avatar
  • 447
0 votes
1 answer
23 views

Creating random points based on a classified raster WITHOUT detour via raster-to-vector-conversion (QGIS 3.16, Win10)

I'd like to create a random-point-vector-file from a classified raster with a given number of points per class. I found several solutions or tool recommendations in diverse forums. But, all these ...
user avatar
  • 447
4 votes
2 answers
365 views

Numbering points per polygon group with QGIS expressions

In QGIS, I have a point and a polygon layer. I want to number the points ascending from left to right (from smallest to highest x-coordinate value - West to East). However, counting should be made ...
user avatar
  • 42k
1 vote
1 answer
61 views

Specifying the number of points per class (not per feature) when doing stratified sampling

I am quite new to QGIS (3.16 / Win 10) and have a raster of one band with integer values from 1 to 14. I polygonized this raster in order to generate random points afterwards. The derived polgonized ...
user avatar
  • 447
3 votes
1 answer
107 views

Filling features' attributes from line layer depending on what point layer is snapped to their start/end point in QGIS

I have LineLayer with "start_point" and "end_point" field attributes which can snap to either PointLayer1 or PointLayer2. Using the Field calculator, I would like to make an ...
user avatar
3 votes
2 answers
159 views

Selecting random points from feature class

I have shapefile that includes 49 points (wells). I want to create 100 networks that include 20 randomly selected points from first network. When I used create random point tool, Some networks were ...
user avatar
4 votes
1 answer
93 views

Visualizing most recent point by date in QGIS

Does anyone know how to visualize in QGIS, in a group of points with an associated date, the point corresponding to the last date? For example, a vector layer with 4 points: id Name Date 1 Joana ...
user avatar
5 votes
2 answers
242 views

Rasterizing overlapping buffers in QGIS

I have a vector layer of multi-ring buffers in QGIS, where each ring contains a different cooling intensity value for a green space, at distance intervals of 30 meters moving away from the green space ...
user avatar
2 votes
0 answers
975 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 ...
user avatar
1 vote
2 answers
196 views

"Difference failed" error when using difference tool with point layers as input and overlay in QGIS

Is it possible in QGIS 3.16 to use the geoprocessing tool "Difference" with point layers as input and overlay? The documentation seems to indicate that it is. However, when I do a test with ...
user avatar
1 vote
1 answer
320 views

Is there a way to find the original pixel x and y coordinates from a point on a georeferenced image?

I am attempting to find ground control points for historical aerial images. I have a reference Digital Elevation Model (2016), which I have used to georeference multiple flightlines over a mostly ...
user avatar
4 votes
1 answer
77 views

Interpolating point attributes

I'm trying to fix broken sections in navigation data in QGIS. I have a model that cuts out broken sections of a point layer and inserts new points according to a line layer that I added earlier. The ...
user avatar
  • 49
3 votes
1 answer
98 views

Detecting intersection points which lay within U-shape using ArcPy

I have three shapefiles: the first is a line the second contains a polygon and the third contains all intersections points of the shapefiles. I have written an algorithm that adds the length of the ...
user avatar
  • 55
6 votes
3 answers
2k views

Using Python for interpolate data points with Scipy (open for other solutions as well)

I have dataframe which contains coordinates and measurements, something similar to this (this is fake): id lat long mes 0 -14.1309 -52.4561 0.1 1 -14.1312 -52.5327 ...
user avatar
  • 1,827
2 votes
0 answers
139 views

Number of points in .las by PDAL from Python

I need to recieve the number of points that .las file has from Python and save it as variable. For now I'm doing it like this: def execute(self, pipeline): pipeline = pdal.Pipeline(json.dumps(...
user avatar
4 votes
4 answers
259 views

Creating line layer from point layer with start and end attributes in QGIS

I have a CSV file that contains attributes for a start node and end node of a pipe in a single record. This is data collected in the field, so the inspector captures the lat/long at each end of the ...
user avatar
  • 945
2 votes
0 answers
80 views

Error in a script to create perpendicular lines connecting point and lines in QGIS [closed]

I'm using this script that draws a perpendicular line between a point and the nearest line segment, but when I use the Python terminal and paste the script, I get an error: Traceback (most recent call ...
user avatar
2 votes
2 answers
304 views

Creating grid in QGIS 3.18.3

How do I draw a grid of n by n on the shapefile of a city with a CRS of EPSG:4326? I have tried creating gird in ESPG:32735 I have created a grid using this. Vector -> Research Tools -> Vector ...
user avatar
0 votes
0 answers
74 views

Using spatial buffer to "declutter" and retain point data in ArcMap

I have a shapefile of point data (lat/lon points) that I need to "declutter" a bit, based on a 15 km spatial buffer around each point. The image below shows what the data points look like, ...
user avatar
2 votes
2 answers
349 views

How to read LAS header or read only some attributes of LAZ file with LAStools/C++

It takes lots of time when reading laz files when you iterate hundreds of laz file. But reading only the header can only takes less than 100 ms to read hundreds of las files. The same problems arises ...
user avatar
0 votes
0 answers
47 views

Batch conversion of point feature class to raster

I have a point feature class that contains over 100 columns (variables) of data. I would like to convert each column to a raster. The reason for doing this is to create a multiband raster that can be ...
user avatar
0 votes
0 answers
86 views

Generating points along a GPX line with 3D distance intervals

I recently tracking the road using Garmin GPS, I get the tracking line which is in GPX format. The file has CRS EPSG:4326 Now, I want to make point with specific interval (100 m) along the line. I ...
user avatar
  • 165
-1 votes
1 answer
95 views

Calculating average elevation from given points layer and DEM

I am using QGIS 3.18. I have a point layer showing population estimates at the administrative center points and an aster digital elevation map. I'm trying to calculate the average elevation of these ...
user avatar
  • 9
0 votes
1 answer
89 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 ...
user avatar
  • 49
1 vote
1 answer
168 views

Interpolating weather data in QGIS

I am trying to find a proper way to interpolate weather data and use it for regions without the data. The black points are the weather stations that give me the weather data, the red points are the ...
user avatar
  • 21
1 vote
1 answer
66 views

Heatmap based on numeric attributes, not on density for line representation using QGIS

I have a number of points on a map, each with a numeric attribute taking values from 1-9. The points with attribute equal 1 should have the highest density representation, and the points with ...
user avatar
  • 131
1 vote
0 answers
26 views

How to find average distance of points in polygon to boundary of polygons?

I have a layer of polygons and a layer of points that I lay on top of those polygons. Some polygons, which I will refer to here as "zones", will contain 1 point within their boundary, and ...
user avatar

1
3 4
5
6 7
43