Questions tagged [point]

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

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31 views

Is there a QGIS plugin to drop pins on a repeating pattern in a raster?

I'm looking for a QGIS plugin that drops pins on a repeating pattern in an imperfect raster grid, for example a satellite image. Ideally, one would select a polygon to drop within, a raster, give it ...
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1answer
100 views

Getting coordinates across one road

I download .shp and .dbf files for roads, extract it and save to database. I display points with the same name as the street on my own Google Map. This is how it looks like: I found that not each ...
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1answer
27 views

Finding best path through set of many points using ArcGIS Pro

Assume I have many points, say 100 or more, that represent a station to visit. I want to choose one of them as a starting point, and then navigate to each and every one thereafter to take a sample of ...
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28 views

Fixing fixed layer offset

I have a shapefile layer whose CRS is WGS84. However, all points are off by some fraction of degree, roughly corresponding to a dozen of meters. Is there a way in QGIS to fix this offset? I can more ...
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1answer
26 views

Display connections between points in QGIS interactively

I have a layer (pointLayer) with point features: Fields: ID, toID. All points have a value in ID, some have a value in toID. If a point "A" has a value in toID, I want to display a line ...
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1answer
31 views

Finding the percentage of change of 30 meter resolution raster within buffer area

How could I find the percentage of change for each buffer area in the image below using ArcGIS Pro 2.5.0? I want to be able to show the percentage of change for each INDIVIDUAL and "unique" ...
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1answer
9 views

Multiple symbols for various attributes of the same feature

I have a point feature class where many points have more than one value for the same attribute (the values are in a single column in the attribute table, separated by commas). I am thinking of ...
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1answer
37 views

QGIS distance between points - line_locate_point()

I need to calculate distances between points that are overlapping a layer with a line (representative of a river corridor (thus there are two layers; one is the points the other is a line). I've tried ...
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1answer
34 views

Exporting points according to a route I made

So I work on a ship and get given a shape file with points on it and I am required to make a vessel route out of this. The problem is that once I have created a route between all the points and export ...
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1answer
31 views

How to label point features with alphanumeric labels. Only allowing numbers?

New to QGIS. Using point features as markers on a map imported from Google Earth. In my first shapefile layer the alphanumeric labelling worked fine. Added in a second layer and it is only allowing ...
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3answers
276 views

Creating polygons with fixed extent based on point which represents S/W corner using QGIS

I have a point data set which contains the information of workplaces per hectare. Each point represents the South-Western corner of the surveyed hectare. Not the entire map is covered with points, ...
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2answers
105 views

Spatially join attributes from point to polygon side with numerous contiguous polygons and numerous adjacent points

I have been trying for 2 days to join points representing addresses (in Paris region) to the closest polygon (parcel of land). The problems: The parcels of land are contiguous, sometimes a point ...
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106 views

Create point at every vertices of feature

I have a layer with polygons and one with points at every vertices of polygon ( so I can label them with a number). I want to create a point at every new or modified vertex with virtual layer. At the ...
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1answer
94 views

“Select by location” fails for points touching/intersecting on lines

I try to use the "Select by Location" tool in QGIS 3.10 to: Select points in one layer located on lines of another layer (I am using "intersect" option but I have also tried the ...
4
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1answer
131 views

Spatial interpolation in PostGIS without outputting Raster

I have some data that is similar to rainfall, ie. a latitude, longitude, and a Z number. It is in a point layer that is a nice clean point grid. Many Z numbers are missing in this grid. I want to ...
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2answers
83 views

FME: Coordinates with a buffer - how to merge / dissolve points that overlap other buffers?

I'm trying to process some spatial query in FME. I have a dataset of cities with coordinate pairs and around these coordinates a buffer of 2 km. This results in multiple overlaps. I'd like to dissolve ...
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1answer
58 views

Export/convert Points to Polygon

I have to convert a .shp into a .csv file and upload it to the SQL Server, for a program that only supports Polygon format and can not render Points. Is there a way to convert Points to Polygon or is ...
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1answer
58 views

Snap Geometry to Layer (Line to Point) does not snap all lines within the tolerance limit

I've been using QGIS 3.14 version to snap geometries to layer. When I try to run this, I have to fix the geometry first before I run select by location. I checked the output, most are correct but ...
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74 views

160180: The junction has invalid geometry (i.e., non-point or invalid location)

I made the following In ArcGIS Pro: I created a point layer from elevation lines (every 10 meter, in total there is 5.5 million points). TOPO TO RASTER- When I run this tool with the point layer from ...
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1answer
26 views

Creating a new layer based on criteria of multiple layers

I'm really new to ArcGIS and have been trying to search for whether this is possible but don't know the correct terminology to look it up. I have two layers on my map, one of lines and one of points. ...
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0answers
30 views

Using QGIS Rotate Point Symbols tool when multiple point objects have same coordinates

I'm using SVG symbols to display a layer which represents the location of traffic accidents. The rotation of the symbol indicates the direction the vehicle was travelling. The rotation angle is ...
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1answer
119 views

Interpolating point on each line from vertex in QGIS

How can I interpolate a point on each line from the vertex? I need to interpolate each vertex along the line for a certain distance. I need offset on all lines. Standard QGIS tools shift incorrectly ...
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0answers
23 views

List points from other layer where intersects with line

I want to make an easy script for QGIS calc. I have 2 layers (points, and line). Painting the line crosing by points. At end I want to automaticly fill fild (text attribute) with list of points. I was ...
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32 views

Point density with ModelBuilder

Now I have a lot of files that contain XY coordinates, like the picture, but this picture just contains one day. However, I want to integrate all the files I have. Secondly, I want to integrate all ...
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2answers
69 views

Finding median value of many points within polygon using ArcMap

I am using ArcMap version 10.7. I have 2 layers, one point and one polygon (council district boundaries). The polygon layer has several polygons in it and each point has a dollar amount associated ...
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2answers
45 views

Update coordinates on geopackage with shapefile

I have a geopackage file that has all the information about certain items but the coordinates need to be updated. I'm using an old Leica 1200 GPS to get the new coordinates and giving the same ID to ...
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1answer
42 views

Getting maximum distance for point features in the same point group

For each group I want to find the maximum point-to-point distance (and which of the id1 features participate in the max). For example, if I have the following attribute table: FID Long Lat id1 ...
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50 views

Extracting nightlight data using Google Earth Engine

I would like to extract Night-time light data (VIIRS) for a set of points in Australia (imported from csv file). The output, however, does not show the nightlight information. I am not sure if there ...
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2answers
95 views

calculate st_distance between the point in km (m)

I try to calculate the distance between two geogprahical points, using st_distance. The points are stored in a data frame, but for simplicity, I take one pair of points to show the problem. Here are ...
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0answers
9 views

Click a polygon and have associated points be displayed

I am mapping farms with the turnouts that deliver water to the fields. The farms (polygons) are parcels with a text field with 1-4 turnouts. Example- 2478,2479,4910,4911. The turnouts (points) have a ...
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2answers
60 views

Create Lines between points using points ID

I am trying to recreate in QGIS a few diferent sets of constellations. I already have a layer with all the stars I need, with ID and coordinates (downloaded from here astronomyData.zip), and I also ...
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2answers
42 views

Connecting different points (more than two) with different lines in QGIS [closed]

I have different points (stations) which I made as point layers in my map, and now I want to create a line network of a public transportation system, as such I want to connect different points (more ...
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1answer
67 views

How to get QGIS progressive distance polyline and points?

In QGIS how I get the distance between a layer of points and a polyline layer? I have tried with a distance matrix but it does not seem to be working, I have a layer of points and a polyline; the ...
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1answer
19 views

Why when I do an intersect analysis on a point feature class to a line feature class I only get 'one' point result?

ArcGIS Pro. I've merged my point feature classes of species and have gone to run an Intersect Analysis on these with a line (river) feature class. However, I only receive one point in the output and I ...
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0answers
37 views

Count number of points inside a pixel in QGIS [duplicate]

For a project I want to count the number of points in a raster, just like the picture below, in order to get idea of the point density. It seems simple but for some reason I am unable to find away to ...
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1answer
48 views

CSV file does not display points in QGIS 3.6

I insert a CSV file to QGIS 3.6, but something is wrong with the CRS. Firstly, I set the CRS of the project that I have ( USER 100000 * Παραγόμενο ΣΑΣ (+proj=eqc +lat_ts=0 +lat_0=0 +lon_0=0 +x_0=0 +...
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1answer
57 views

Select points at the end of a line [closed]

I have two layers in QGIS: "line" layer which consists of lines and multi-lines "Point" with points with attribute 'Code' How to write a efficient script in PyQGIS to find out ...
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0answers
12 views

Distance from a point to the two neightbouring points (both directions) in on a polyline of a pipe system

I need to find the distance of a valve to the two neightbouring corners in a piping system. I have the following shp files: -Nodes for the valves -Nodes for the corners -line layer file of the piping ...
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2answers
76 views

Finding all possible adjacent/closest geometrical points from a given point

So, I have a dataframe like this, import numpy as np import pandas as pd import descartes from shapely.geometry import Point, Polygon import geopandas as gpd import matplotlib.pyplot as plt df = pd....
2
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1answer
40 views

Point values obtained from rasters with different extent, projection and resolution

I am trying to predict a species' distribution. I am fairly new to GIS, so apologies if I am talking nonsense. I gathered various geo-referenced environmental data from different databases. The files ...
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0answers
15 views

Drawing polygon constant km around point in lat/lon coordinates in QGIS3.12

I have a set of points in lat/lon coordinates over Europe representing pixels from a satellite dataset. I know each pixel has size 10x10km. I want to draw a square polygon around each single pixel ...
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0answers
20 views

Using R to plot maps using different projections

I currently plot global maps in R using the standard projection in maps (). As far as I understand this is the mercator projection. Now I want to use a projection that better represents the areas of ...
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0answers
40 views

How to make a PostGIS LINESTRING with only one initial point

I have a service that will be sending GPS coordinates as it moves, and these will be added to my PostgreSQL / PostGIS database. Right now, created a table with one column that is a Geometry("...
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1answer
57 views

Eliminating end points automatically

In QGIS 3.10 I have a point file and I decided a colors palettes for it. Let's say this palette is composed by 11 colours steps, from blue to red and its intermediates. So, I would like to ...
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0answers
34 views

Plotting arrows in a map to show shifts in coordinates or points using ggplot2

Plotting arrows in a map to show shifts in coordinates or points using ggplot2 I have three points in my map (latitudes and longitudes of the points: a, b and c are provided below). I would like to ...
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20 views

Apply raster data to points from multiple years

I am quite new to QGIS so please bear with me. My data set is of presences data with latitude, longitude, month, and year of cetaceans. The time frame is from different months and from the year 1990 ...
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1answer
67 views

Stat_density_2d density plot seem to show too high density values for a small dataset

I'm working with a two-column data.frame with the columns containing x and y coordinates (Longitude, Latitude). A simple way to visualize a density map is by using the 'stat_density_2d' function. When ...
2
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1answer
88 views

Linking points with lines for display in QGIS

I have 2 point shapefiles which contain lat and longs and I need to connect these with a line for display, not analysis. I am using QGIS 3.4. To explain further, for one individual species/animal (i.e....
1
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1answer
48 views

QGIS3.10, Find all points that are located on a line

Inside my .shp there are two simple layer: "Points_Example" (Type: Point, EPSG:25832) "Lines_Example" (Type: Line, EPSG:25832) Some of the points are located exactly on the line ...
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1answer
38 views

Process to calculate distance from points to line in QGIS [duplicate]

I am trying to calculate the distance between each point(as seen in the picture below) and its nearest line which is a road. I have tried to rasterize the data on all the roads and I end up with the ...

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