Questions tagged [point]

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

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21 views

Model or script to calculate distance from each point in a multipoint file to the center of a matching polygon in ArcGIS Pro

I am working in ArcGIS Pro. I have a series of multipoint features that represent release locations for individual animals. I have a series of these, for multiple study sites. At each study site - I ...
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17 views

Manhattan distance between a point and a line [closed]

I would like to know if anyone knows a code in python to implement the minimum manhattan distance between a point and a line.
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25 views

Finding close road centerlines to given trajectory

I am working on trajectory prediction model for autonomous vehicle using previous trajectory and road information. I have lane centerlines. I need to filter them. (Removing unnecessary lanes). I ...
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1answer
73 views

Linear referencing to calculate maximum distance between points by group along line (river system) using ArcGIS Pro

I am using ArcGIS Pro. I have a series of points representing animal locations that were tracked in a small stream. I would like to get the distance between the most upstream and downstream location ...
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1answer
25 views

Random points within a grid cell on a line

I'm trying to create random points on a line within a grid cell. I have a river layer within a state boundary. I have placed a grid over the state boundary. I would like to assign 5 random points ...
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1answer
39 views

Join attributes by location fails to join to selected features

There's an issue when I perform the "join attributes by location" tool. I have a simple polygon layer representing urban areas. I also have a point layer with human population estimates. My aim is to ...
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1answer
85 views

arcpy.SelectByAttribute 'Parameters are not valid' error

I am trying to run a python script to select 5 random points in an attribute table and to loop through every 100 points to do this. When I run the function SelectRandomByCOunt within a python shell, ...
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1answer
20 views

Attach features of lines to points

I am trying to calculate the cost of network to homes. In the image i have cable (brown line) between utility boxes(pink/blue points) and home feed (black dash) to the home. I know the cost for each ...
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18 views

Opening hyperlinks in a new tab from GeoJSON points when the link to the website is embeded in GeoJSON? [closed]

In the code below the point links are embeded in GeoJSON object places_geojson. How could we make the link to be opened in a new tab? I believe that this functionality need to be added in the ...
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1answer
24 views

Put the start and the end name of a point object into the layer of the line object that connects them? [duplicate]

I am new to QGIS. I am given two layers with point objects. In their attribute table each of this objects has a code (name) given previously to it by someone else. Then I import the lines from AutoCAD ...
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2answers
40 views

Removing both sets of duplicate points

I'm trying to create points on the edges of polygons. So far I have converted the polygons to lines, then exploded the lines, then ran the following code which plots a point in the middle of the ...
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32 views

Difference between grid and its centroid

Recently I was download GPCC gridded precipitation data. I plot them on Matlab and it gives me pixels. then I tried to plot them on the ArcMap and saw there are lots of points instead of pixels. What ...
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Assigning elevation to point shapefile based on point file using ArcGIS Desktop

Goal: Extract elevation data (Data B) based on given point file locations (Data A). Current problem: I have several sets of xyz data for large areas with a resolution of 1m. I converted those to ...
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53 views

Define custom projection in QGIS from some control points

I have six control points in a local mine grid which I want to use to define a custom projection in QGIS. The reference points are in GDA94 / MGA zone 50 (EPSG:28350) (https://spatialreference.org/ref/...
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2answers
73 views

Plotting point every x m2 in polygon using QGIS plugin

I'm trying to work out whether its possible to plot a point every so often within a polygon. For example, if I have a polygon thats 200x200m, perhaps I could plot a point at every meter squared ...
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17 views

Upload waypoints to OpenStreetMap

I want to upload waypoints recorded in the maps.me app onto openstreetmap.org for further editing. Already tried: Export from maps.me to .kml then conversion to .gpx with QGIS (second try with ...
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1answer
35 views

Delete overlapping points between two shapefiles QGIS

I have a point shapefile of all human settlements in South Africa (ranging from tiny hamlets to major cities). In another shapefile, I have point features as well, representing settlements located ...
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42 views

Adding break/vertex on a polyline from points

I have a polyline which consists of just one geometry. I have points which are evenly spaced (25m). How would I add these point vertices to the line so that the points will create one line segment/...
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13 views

Rasterize will output 0 as NODATA (QGIS)

I have a data range which includes 0 ex +3 to -4. I would like the rasterize to include my 0 data (create a pixel) and just exclude the NODATA (where there is no points)
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29 views

Rasterize right method for true value of point grid?

Is rasterize an interpolation or does it just burn in the "true" value of the point? I have a grided data that is evenly spaced and dense. I would like to just have a raster with the "real" value of ...
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36 views

Is points to route still available in QGIS 3.4?

I need to do the same thing as the post here as I need to create polylines based on given points with sequence attribute, and networks, but I cannot find the tool in toolbox: my point data and ...
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0answers
28 views

Not all points overlain on raster map are showing up with R

Using R, I loaded a raster file (.tif) and overlaid points on the map. I have 46 points but only about half of them appear on the map. I can't figure out why other points are not showing up. Here are ...
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34 views

Grouping points by attributes from field with possibly many values

I have a shapefile "cities" with one unique city_id for each city (geometry polygon, although not relevant here) : city_name ; city_id New-York ; 0001 Paris ; 0002 London ; 0003 And a ...
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37 views

Calculate road distances between points in QGIS 3.4?

I would like to calculate road distances between a series of points. I don't have any road network layer, I need to rely on OpenStreetMap. What is the best plugin available right now? And how ...
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46 views

Points group automatically when adding delimited text layer [duplicate]

I'm using QGIS 3.10. I am working with an Excel table with records having coordinates. I'm adding a delimited text layer, that is shown as points. However, records with the same coordinates are shown ...
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37 views

Why is my Nearest neighbour outputting higher value in a equally spaced grid?

So I got a point layer which is equally spaced 0,5x0,5. When I run the nearest neighbour and accounting for the extent so that the raster cells are centered, I get this result. I got maybe five areas ...
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32 views

Point grid in QGIS

I'm working on a project that needs me to map out a point grid for drilling work. The grid needs to fall within an already created polygon and be spaced 30x35meters. I was able to overlay a pointgrid ...
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2answers
66 views

Unfinished Layer with QGIS Contour Plugin

I am using QGIS 3.4.13 Madeira on Windows 10 I have an issue with the QGIS Contour Plugin. I have two point layers, they contain about 45'000 points in the exact same locations. The only differences ...
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15 views

Rescaling point distance values

I have a single line feature that I have converted into points that also contains an attribute field with each point distance value along the line. I’ve edited that line (e.g. made it longer, changed ...
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2answers
47 views

Converting from SHP into TXT file using PyQGIS [duplicate]

I'm working with many shp file point format with geometry attributes like this: But I need convert it into such format in textfile like below: Are there any ways to arrange my shapefiles format into ...
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3answers
209 views

Creating point at line end using QGIS

For an examination of a local power grid, I need to mark the transformation stations (substation) by simply create a point for each station. What I want to do is that QGIS creates a point at the end ...
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1answer
31 views

If I selected (highlight) a feature or points would I be able to color that feature as as it is being highlighted?

The points on purple and lightgreen area I want to maintain them reds. The points outside that I want to color them yellow not just the highlighted ones. How can I do that?
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22 views

Combining orthophoto and DEM to export xyz-CSV

I have a georeferenced orthophoto and a DEM as tiff-file. For my further workflow I want to export x,y,z (x,y from the orthophoto and z from the DEM). I already managed to create a point layer and ...
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1answer
47 views

Rendering 3D points in QGIS

I am using 3D map view in QGIS 3.4 and I have point data. On layer properties I have enabled 3D Renderer but the billboard rendering to point option does not seem to be there. Does anyone know where ...
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1answer
42 views

Adding information to points [closed]

New to QGIS here. I'm trying to figure out how to add information to set points. I'm trying to use them as leads, so I can put lead name, address, phone number, whether they've been talked to, etc. ...
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23 views

How to calculate the number of pixels in each class using QGIS?

I have a raster file with slope values. These slope values are divided among several classes like A,B,C. Then there's a vector map with points. For an example a point can belong to class A of slope ...
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1answer
23 views

Using weighted species distribution data to create a scored grid map

I'm currently working on a project within ArcGIS Pro, I have a large dataset (>40000 points) comprising a list of ~120 indicator species as point data that are assigned numerical scores (1-10) based ...
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1answer
31 views

Select evenly distirbuted points of unevenly distributed set

I have a task which looks pretty nontrivial yet pretty standard. Let's say, I have a set of points, unevenly distributed on the map (i.e. in some regions there are a lot of points, while in the ...
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1answer
38 views

Split linestring by selecting two points in OpenLayers?

I have a project where people can drag and drop a gpx file. This results in a multilinestring. People should be able to take a piece of their route and submit that. I was thinking of letting the user ...
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1answer
34 views

Output file from Point Sampling Tool plugin returns data but no sample ID using QGIS

I have sampling points in QGIS which all have a unique ID, and I'm trying to collect various geographic and climate data for those points from a variety of sources. Although the source raster data ...
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0answers
31 views

Moving points to nearest raster cell with values in ArcMap [closed]

I have two types of data, one that is a point vector (occurrences), and one that is a raster (environment). The environmental data has both cells with numerical values or NA. Both of the types of data ...
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2answers
112 views

Calculate sequential numbers along line

I am looking for a way to calculate sequential numbers in points feature along line. I've got polygon 1 feature intersected with other layer of polygons. Then I extract points from the intersection, ...
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1answer
41 views

Adding points every X distance along a LineString [closed]

I have a list of LineString coords: list = [(90, 170), (99.0, 159.0), (321.0, 159.0), (300, 146), (296, 23)] which looks like this. How to interpolate a point at every X distance along the line ...
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1answer
43 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 ...
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29 views

Creating random points using feature class points data within polygon using ArcGIS Desktop

I have ArcGIS Desktop 10.4. I have a shapefile containing a number of polygons with specified attributes. And a feature class containing a large number of points. both have a field in common. ...
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1answer
41 views

Joining point layer with line layer using coordinates

I am using QGIS 3.14, and I want to represent a road network. I had a polyline layer (3257 entities) as a background. For each one I have calculated x_start, y_start, x_end, y_end coordinates, length ...
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1answer
32 views

Create points along a line from spreadsheet data in QGIS

I have a sewer network comprising: Manholes - a points layer Pipes - a polyline layer, with attributes comprising the upstream and downstream manhole I have a spreadsheet of pipe defects (from a ...
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1answer
69 views

Copying set of points perpendicular along polyline

I have a polyline which represents the middle of a river. Perpendicular to this polyline there is a layer with a set of points. These points all have an "X" and "Y" coordinates as well as a height ...
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0answers
11 views

Extrapolating point values to raster, excluding NAs

I have a raster generated from drone imagery that has been classified into water (river channel) and NA (all areas outside the wetted channel). I have a point file running down the center of the river ...
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2answers
85 views

Populate field in one layer with corresponding value from another layer

I have 2 existing vector layers: 1 point, 1 polygon. In almost all cases the points overlap a polygon. The point layer has multiple features (1,000+) with an existing field which I need to ...

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