Questions tagged [point]

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

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10 views

Populate Elevation Data in GPX using FME

New to FME, and I have now spent more time than I would like to admit on this and need some pointers. I have a GPX file that was made from a Shapefile. It has no elevation data. I have the Terrain50 ...
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1answer
73 views

Mapping polygons into lines and projecting lines on road network

I have a layer with polygons that describe road damages. I have then another layer with road network lines. The layers are shown in the picture. I need to project the polygons as lines to the road ...
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Plotting xy data in ArcMap

I have a .csv containing the name, longitude, and latitude in the first, second and third column, respectively. Longitude and latitude are in decimal degrees in WGS 84. However, if I try to plot these ...
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Finding a pour point in a polygon?

I have a polygon shapefile (created by someone else) that is a bunch of little watersheds. Unfortunately, it doesn't include any coordinates in the attribute table for the lat/long of the pour point ...
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1answer
32 views

Data of attribute table is not showing on ArcMap

I have downloaded a point shapefile and when I can add this in my ArcMap 10.4. But the problem is when I try to open the attribute table it says this message and end up with bank rows. It shows the ...
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ERROR 010555: Internal error in Sample: %s. Failed to execute (ExtractMultiValuesToPoints)

I'm trying to run the following code to extract different types of climate data for various points: # Climate variables inRasterList2 = [["AET.tif", "AET"], ["...
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Extract into a dataframe the number of points in each buffer, in a set of concentric equi-distance buffers around a single point

I have the locations of the patients using an healthcare facility, and wants to extract the number of patients living at given distances from the hospital. I generated buffers at 500m increments ...
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Align arrow (point layer) to water direction (line feature)

Assuming that pipes are digitizet correctly (first node as upstream, last as downstream), I need to align the arrows of a point layer to display flowmeter's direction. So far I need to use v.split (...
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Python code error invalid geojson

I have a javascript code that worked well , but when convert to python it's doesn't work and raise invalid geojson error . my code in java script is : var point = ee.Geometry.Point([52.55845586988192,...
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1answer
89 views

Categorising point layer twice by size and form in QGIS

I have data points from a CSV-file that I opened in QGIS. The points illustrate different power plants of solar, wind, geothermal, coal, oil, etc with different capacities within each class. I already ...
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25 views

Display points from CSV table (feature collection) in Google Earth Engine

Unfortunately, I cannot display the point data I uploaded as csv file. I specified latitude and longitude, the rest is unknown so I kept it at default. Can somebody help? Link to asset
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1answer
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Delete points on the map to remain only one for each plane in OpenLayers

I'm trying to put on the map the route of an ads-b plane, I've managed this so far ... Poblema is as follows puts all the points since I started to intercept him until the end what is not correct ...
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1answer
38 views

Representing stationary elements in flow map

I have been trying to make flow maps to show social relationships between people geographically based on baptismal records. I have successfully made maps using https://anitagraser.com/2019/05/04/flow-...
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3answers
48 views

Convert points layer into a circular polygon on R

As the title says, I am supposed to convert a point layer similar to this one (it represents the perimeter of a tree at a certain height, and it's a sf that I called "points" in R): I would ...
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23 views

Pan to a specific point - QGIS 3 [duplicate]

On a point layer, if there are many points, I want that on clicking one point it should pan to some specific point( that i choose). If possible, the destination point should blink. Need this for ...
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Generate Radio Channel Number Keeping 2km Buffer

I have point data and each point has a serial number (as shown in the screenshot) Each of my points is like a wireless access point and cannot be on the same radio channel as another wireless access ...
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3answers
125 views

Calculating distance of all points to central point using QGIS

I'm using QGIS and the points on this map represent different periods of the day in which coyotes were observed. I am trying to figure out if coyotes are active at different times of the day based on ...
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Extract values from rasterstack TIFF for point data locations in Python

I am working on machine learning algorithms for predicting wildfire sites on state level. I have a CSV of wildfire instances, that has 37 columns including a geometry column, a lat column and a lon ...
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40 views

Shape or point pattern [closed]

Is it possible to draw one shapeline or one point and repeat it in a specific direction with a specific distance for a specific amount? Like the pattern function in AutoCAD? I'm working with QGIS. An ...
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When I edit a point, press save, it says saved, but really doesn't

I'm a newbie in GIS. The problems starts when I import some points gather from QField. I was improving my fields while learning, to have drop down options in some features, but now I can't save my ...
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1answer
47 views

Shapefile points, individual editing

I am very new to QGIS and have run into a problem dealing with shapefiles. Recently, I went into the field with an app for smartphones called 'SW Maps' that I used to create some basic layers for ...
3
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1answer
57 views

QGIS 3 - default marker symbology

Working with QGIS3 (QGIS 3.2.3) Is it possible to change what the default point symbol is when adding a new point layer to a new project? Context: I have to work with massive point layers very often. ...
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91 views

Polygon to Point Grid with the same information

I want a grid of points (with defined spaces between them) inside a Polygon. All the points should contain the same information as the original Polygon did. I tried the centroid (only one point -> ...
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33 views

Missing connections between line and points

I have two shapefiles line layer (Blue color) points layer which represents houses (Green color)) I am trying to connect line with points (houses). For that, I used closestSegmentWithContext as ...
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1answer
87 views

Mixed symbology for point layer in QGIS

I have a point layer which symbolize trees. This trees has fields "Specie" and "Diameter" among others. I would like to symbolize them by size depending on the "Diameter" ...
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1answer
29 views

Copying a field (column) value from a Voronoi polygon into the point inside that polygon

I'm relatively new in GIS and I am using QGIS. I'm trying to find a way to copy a field value from a voronoi polygon layer into each point that is currently inside the said polygon. Each voronoi ...
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204 views

Convert vertices of polygon features to points using Virtual Layer in QGIS

I have a polygon layer and want to use a Virtual Layer that creates points from the vertices of the polygon layer. The question is how to write a query that does this? I am aware of the tool "...
3
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1answer
58 views

Extracting x,y coordinates from `QgsGeometry: Point(x, y)` using PyQGIS

I'm trying to extract the coordinates of a feature vertex. When I write on my editor print(vertex) what I get is <QgsGeometry: Point(58746.43000004297, -256665.088999123)> But when I try to ...
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1answer
90 views

Removing intersect or overlap of points in the same vector layer

Is there anyway to remove the intercept part of the vector points? P.S. Please ignore the red circle, it's not a polygon, it is a hand drawn by me to show the error part So far I've done: "...
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1answer
36 views

Adding Z-dimension point to layer

I have a point. I want to add to a Point layer in QGIS 3.16, but I can't get the Z-dimension working on my layer. The point is created but has no z-value... coord = qgis.utils.iface.activeLayer().crs()...
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1answer
33 views

Area commanded from given point

I want to define the area below a contour that slopes at a particular angle (say -0.05%) from a particular point, for many points. I have a DEM, and can compute contours at a particular level (say 200 ...
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1answer
16 views

Combining information from two point layers based on the nearest neighbour relationship

I have two layers: One a modeled dataset with points on a 1x1km grid across the globe. I also have another layer which is my own data points which are scattered across the globe. What I want to do is ...
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Importing gpx track points as vector layer using PyQGIS

I have a gpx track and want to import it to QGIS using PyQGIS. When I add the gpx manually (add vector layer), I select track points, and get all the points and attributes with the new layer: When ...
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1answer
49 views

Determining the Coordinate system for set of points

I have the following set of points. X Y 618263.27 6153928.04 601343.35 6492627.09 670869.41 6448843.47 499463.38 6201245.29 569373.30374535 6140971.32153155 579069.9206 6142002.1728 587240....
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1answer
166 views

Re-locating points randomly at certain distance in QGIS

I have GPS coordinates which identify aid projects in Africa. Now, I want to re-locate these projects, such that each project is re-located by 100 km in a random direction from its original location. (...
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2answers
278 views

Perpendicular lines on line using QGIS

I am using QGIS. I want to create perpendicular Lines on another Line (River). The Lines should be created on points on the Line and should have a length of 40 Meters. I want to create the red lines ...
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61 views

Buffer around Point is elliptical, not circular

I'm trying to create a circle around a point using the code from this answer here. Adding below for better visibility as well from functools import partial import pyproj from shapely.ops import ...
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3answers
77 views

Digitizing and adding attribute values to the points in QGIS

I want to build a digital terrain model from nautical charts. I need to capture the points where depth is indicated in the chart, and for each point, I must attribute the depth value. One by one, to ...
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1answer
16 views

Giving points in the same delimited text layer multiple colours-while using point displacement

I want to give multiple colours to points within the same delimited text layer, while using point displacement, looking for advice on how best to do this. The data are showing occurrences of a variety ...
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2answers
69 views

Why is the following CSV file not being loaded as a points layer in QGIS?

I've been trying to add a certain CSV file as a points layer to QGIS for a while now, without much success. It can be viewed over here. (It was adapted from this .xls data file). In the online ...
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1answer
29 views

Showing labels just for a specific point type [duplicate]

If I have a bunch of points all on the same layer and they are all categorised by different types in the Attribute Table, is there an easy way to just show labels for one type and not the others? ...
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32 views

Querying over multiple bands at one point

I have a multiband raster in PostGIS. I can obtain the value for a specific band at a specific point with SELECT ST_Value(rast, band, ST_SetSRID(ST_MakePoint(x, y), srid)) FROM table; I have 12 bands ...
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Random sample of points to calculate K function on a large point set

For a point pattern analysis in R, I want to study a relatively large point dataset (about 1 million points) with a cross K function to compare different categories of points. Including a Montecarlo ...
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0answers
66 views

Draw lines between points from two layers in QGIS [duplicate]

In QGIS 3.10.4 on Mac, I have two multipoint shapefiles: one is "Start" points, and the other is "To" points. Each layer has "x" and "y" coordinate columns in ...
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2answers
30 views

Keep only certain points on a layer

I'm using QGIS 3.10.4. I have a vector layer that contains more than 200 cities as multiple points on the layer. The attribute table has one column: city name. My goal is to keep only 10 certain ...
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22 views

QGIS create raster from binary point layer

I have a point layer with one of the attributes being binary (yes/no). I want to create a coarse raster which uses the PROPORTION of points within the raster cell which are yes. So not a count but a ...
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2answers
90 views

Calculating isochrone for linestring

I have seen APIs and algorithms for calculating isochrones for a single point, e.g. https://openrouteservice.org/dev/#/api-docs/isochrones. Is it possible to calculate the isochrone for a line segment,...
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0answers
42 views

NNJoin in QGIS does not return any distance

I have two layers, one with ~100,000 points, and another with ~20 polygons. I'm trying to find: a. which polygon a point belongs to b. the distance from the point to that polygon I understand that ...
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58 views

Getting the center point of a cluster in Pandas

I have a list of of coordinates that have areas mapped out as follows import pandas as pd import numpy as np import folium from folium import plugins from folium.plugins import HeatMap import pyodbc ...
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107 views

Removing duplicate points in GeoPandas using distance and time

I have a list of of coordinates that have areas mapped out on a map user_id id latitude longitude requested_at 84 106 13.0472367 77.5022635 12-10-2020 14:59 84 107 13.0472789 77.5024498 ...

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