Questions tagged [point]

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

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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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21 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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1answer
17 views

Counting intersections between line and points using Field Calculator?

I'm using QGIS 3.12 and let's say I have a Layer that consists in Lines that represent 'Rivers', and I have another Layer that consists in Points that represent 'Bridges'. Can I count the number of ...
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Change classification attribute of points in las file by laspy

I'm not able to modify my classification attribute for points that have met the treshold value of Z elevation values. The las file has point format 6 containing ['classification_byte'] and ['...
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1answer
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Identify feature on feature layer (shapefile) automatically without mouse click event on ArcMap 10.2

With a longitude and latitude value, I am trying to identify feature (shapefile) on feature layer with no mouse click or user interaction. On debugging mode with an attach process on ArcMap.exe, the ...
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2answers
48 views

Merging attributes of point features at same location

I have a CSV-file with all the facilities in an area, some sites have multiple facilities so at some locations there will be multiple points e.g. sports hall and swimming pool. Is there a way to join ...
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2answers
79 views

Creating linear connections among points

I would like to create in an automatic way a linear feature representing the connections among all points using ArcMap or Python. That is I would like that each point is connected to the others one ...
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1answer
45 views

“Move feature” for points, manually moving a set of points with the mouse in QGIS

For moving a feature, the process is to edit the layer, use the "move feature" button, then drag and drop the feature. I have a point shapefile layer, and would like to move a set of points. ...
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1answer
19 views

Dissolve and then points along lines fails

I've a set of street data from OSM loaded into a QGIS layer. A lot of the street names have multiple features (where OSM shows a road in a number of line segments). I then use Geoprocessing Tools, ...
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2answers
60 views

Extracting point coordinates from QGIS into Excel using Python [closed]

I was formerly working on ArcGIS but now I'm working on QGIS 2.14.7 and Python 3.8 so I'm a bit confused with the QGIS script. I have to extract coordinate of point layer (CRS:Lambert 93 and WGS84) ...
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Matching points to grid-cells - using join attributes by location

I have point data in a shapefile covering most of Africa. I've made 0.1x0.1 grids using the make grid option from QGIS and now I want to link the grid_id to my point data. Below you will find a ...
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1answer
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Unable to insert geometry point using TypeScript and MassiveJS

I am trying to simply trying to validate a point before I actually insert it into the db. I am using the following: TypeScript: 3.5.2 MassiveJS: 6.4.0 PostgreSQL: 11 PostGIS: 2.5 const ...
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35 views

QGIS Voronoi polygons being generated incorrectly

I am trying to generate some Voronoi/Theissen polygons from points across the UK. From my understanding, any point within a Voronoi polygon should be closer to that polygons origin point than any ...
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1answer
74 views

Connecting lines with point in QGIS

I have two shapefiles Blue network yellow locations as shown in the below figure. I want to connect all yellow dots with the blue lines blue as shown in red color in the figure. Is there a way to ...
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Global Mapper - How can I export point elevation from file .kmz or kml?

I want to get point elevation from file like pic below? Anyone know about it! Thank you!
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3answers
51 views

Drawing transects using point layer as start point

I'm very new to QGIS 3 and I have a problem. I got a point.shp indicating coastal transects long the world's coast set 500 m apart. I selected a subset projecting only the sandy transects along the ...
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1answer
15 views

Add point to existing file with mouse click in ArcGIS Pro

How do I add a point to a point shapefile in ArcGIS Pro 2.0? All the modify options seemed geared toward polygons. I have looked through the documentation and can't find anything.
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1answer
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Data type for point coordinates input in PyQGIS

I am working in QGIS console. I'd like to create new point in existing layer and using two floats as coordinates [1604288.165, 642862.0068]. feat.setGeometry(QgsGeometry.fromPointXY(coords[0], coords[...
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1answer
24 views

Export 3D DXF elevation line with multiple Z-values to points each with a discrete Z-value

We are using a new program that outputs DXF lines with elevation data. I need to compare this data over multiple time-series, but I don't know how to extract it. If I use the identify tool, I can see ...
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1answer
23 views

Use R to combine information in a raster and a point vector according to a separate polygon vector associated with each

This builds off a previous question I had about counting the pixels in a raster that contains at least 1 point (Use R to count the number of pixels in a raster file for which there are at least one ...
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1answer
28 views

Shapefile vector point to ppp spatstat with polygon windows

I always get error to this when converting shapefile point to ppp spatstat that windowed by a polygon shapefile # polygon that to be window neighborhoods <- st_read("neighborhoods/...
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12 views

Move individual address points to closest intersection in ArcGIS

I'm working with ArcGIS 10.3 (standard license). I have approximately 3000 points that are geocoded to the exact address. I'm hoping to anonymize the point data by moving them to the closest road ...
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1answer
22 views

Interpolating FROM points TO points (i.e. not to a new raster)?

Imagine I have two samples of XY points, lets call them A and B, distributed across the same area/extent: Points A have an attribute, lets call it N. I’d like to estimate (i.e. interpolate) attribute ...
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1answer
32 views

Point dataset from CSV showing up outside of known region [duplicate]

I'm using QGIS and trying to display point data from a CSV file. I've added a vector layer with a shapefile of Canada. Both the project CRS and the shapefile CRS are set to NAD83 / Statistics Canada ...
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19 views

Comparing results of cross K-L functions for point patterns

Given marked point patterns with types a, b, and c, spatstat in R allows to easily calculate cross K(a,b) and L(a,b) functions. Envelopes can be used to estimate the significance at a given alpha (0....
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52 views

How to group many points in the same point and colour it by value?

I have coordinates of car incidents and I have to draw a map. The coordinates are not precise: as you can see in the image below you can see the coordinates of 10 incidents and the crossroards where ...
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27 views

Creating a point layer in .tab format in certain symbology of .ttf font with FDO Toolbox 1.4

The current version of QGIS doesn't support creating .tab files of POINT layers with saving the symbology of spatial objects. If you open the output .tab file in MapInfo, you will see, that the whole ...
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1answer
24 views

Distinguish between point and any other spatial type

When running an ST_INTERSECTION query on two linestrings in PostGIS, I expect it to return a point (e.g. 'POINT(1 2)'). This works 99,99 % of the time. However, sometimes (for whatever reason), my ...
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1answer
51 views

Difference between “Join attributes by location” and “Join attributes by location (summary)”

I'm using QGIS 3.4.4. I have a polygon layer and a points layer. When I use Join attributes by location I get the espected results. When I use Join attributes by location (summary) the task failed, ...
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12 views

Controlling for 1st order effect when testing for spatial association between points of two different patterns

Background I have a follow-up question relative to a question I asked long time ago link to earlier question. I am asking a new question since this is something new, even though it builds on the ...
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2answers
29 views

How to create point attribute distribution map in QGIS?

I'm working with multiple species distribution data and am looking at creating what amount to density distribution maps of those species. I have a small number of site locations (18) and only 10 ...
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15 views

Automatically update fields in polyline based on points snapped to the beginning and end

I have a bunch of points with unique ID's and polylines joining them. I need to update the fields on the polylines to have the ID of the point snapped to the beginning and end of each line. How can I ...
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1answer
23 views

How to determine the individual slope values of GPS point features in ArcGIS Pro

I have created a geodatabase raster displaying the slope of a region's terrain and have a number of GPS points which I uploaded into ArcMap (using the GPX to features tool). The points are locations ...
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1answer
84 views

TIN Output empty raster and corrupted Triangulation network

In Qgis: I've got a point shape (EPSG:3398) with some height info and want to create a TIN interpolated raster with the Qgis TIN-Interpolation tool. But after running there was a raster created, which ...
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2answers
40 views

Buffer and Dissolve/Union 2 million points

I'm looking for a solution that will let me add a 100m buffer around 2 million points and then dissolve/union that output into a single multipart polygon. On a much smaller scale (100 points) using R ...
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1answer
24 views

Generating sampling points - making a series of points in the horizontal centre of a long polygon, equidistant spacing on vertical axis

I have a polygon showing the extent of a beach. I would like to create a series of sampling points along that beach, that are equally spaced north to south (say at increments of 100m to the northing ...
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1answer
32 views

Creating polyline segments by points in maximum distance to each other along another polyline using QGIS

I have a polyline layer contains different roads a point layer contains points along these roads with random distances between the points. The points are also listed randomly and not in order along ...
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1answer
48 views

PostGIS - Optimize Point Outside polygon query for 4 million points

I am trying to do a 'point outside polygon' query for GBR with ~ 4 million points. Most of these points are inside the boundary but a handful are falling way outside the boundary. The country shape ...
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1answer
53 views

Calculate azimuth angle in QGIS

I have a few exercises to do and I can't do it at all. I am newbie to this field. I use QGIS 3.4. Exercise 1 What is the azimuth between the starting point and the Z place? I must write the value in ...
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Create random points not creating enough points-ArcMap

I'm creating random survey points within polygons based on how large each patch is, about 1 point per hectare. The points also need to be at least 175m apart. Since the plots are weird shapes, I ...
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2answers
41 views

How to add Google Maps coordinates into ArcMap?

I have set the standard "World Imagery" as a basemap in ArcMap. Now I want to search for places from which I have the coordinates through Google Maps. Let's say I would like to display 51°38'27.1"N 6°...
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1answer
63 views

Checking Points within polygon and assigning value using ArcPy

How can I write arcpy code to determine if the points of a point feature class are inside polygons of a polygon feature class and write the result (true/false) to the point FC's attribute field? I ...
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22 views

I cannot use Point entry into Graphical Modeler in QGIS

I would like to use a Point entry to get the point coordinates in the map to add in the network analysis as a start point. I have added the Point entry into Graphical Modeler, I can click on the map ...
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1answer
93 views

geoplot: axis limits cannot be nan or inf

I am trying to plot a geodataframe with geoplot, and cannot work out the solution to ValueError: Axis limits cannot be NAN or Inf Context: Linux (Ubuntu 19.10, x86_64) cugdf.head(): Cu_ppm ...
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1answer
23 views

Statistical method to quantify the accuracy of point clusters

I have coordinates of about 13 points from different pictures in UTM. Per point I can have 2, 3, 4 or 5 coordinates of these points from 2, 3, 4 or 5 pictures. I would like to quantify the quality of ...
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1answer
78 views

Count number of points outside of Buffer?

I'm trying to count the total points outside of a buffer zone using PostgreSQL. The intention is to find all of the schools that do not fall within a 2 mile radius to libraries. I've either gotten ...
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1answer
26 views

Plot Circles / Polygons with KM radius from CSV in Google Earth Engine

I'm looking to plot a series of points with a set radius in google earth engine from a CSV. The table.draw function I'm currently using plots a pixel based radius, how can I convert this to a Km based ...
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0answers
22 views

Formula to determine polygon points of a bounding box created from this equation

I have a series of points making a linestring I am trying to detect when a user is within a few meters of any section on the linestring with a tolerance factor For this, I use this java code (unsure ...
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1answer
29 views

Errors relating to merging point shapefiles

I have created two different point shapefiles which represent towns within a state. However I want to know the distance between both towns, but first I want to draw a line between them. Is this ...
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1answer
29 views

Merging two point shapefiles as one in using shapely and fiona

I am a little bit confused. I have two point shapefile in the same Co-ordinate reference system, and I am trying to merge them using shapely to merge them together as one and output the geom with ...

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